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# AABC - Associated Air Balance Council
## Sitemaps
- [XML Sitemap](/sitemap_index.xml): Includes all crawlable and indexable pages.
## Posts
- [AABC Publishes Updated National Standards for Total System Balance](/aabc-publishes-updated-national-standards-for-total-system-balance/): The Associated Air Balance Council (AABC) announces the publication of the AABC National Standards for Total System Balance, 8th Edition.
- [AABC Member Robert Kolnes to Present at NFMT West 2026](/aabc-member-robert-kolnes-to-present-at-nfmt-west-2026/): AABC is pleased to share that AABC member Robert Kolnes will present “TAB Fundamentals for Engineers, Commissioning and Energy Management Providers” during this year’s NFMT conference.
- [Certification Leaders to Exhibit at AHR Expo](/certification-leaders-to-exhibit-at-ahr-expo/): The Energy Management Association (EMA), Associated Air Balance Council (AABC) and AABC Commissioning Group (ACG) will exhibit together at the 2027 AHR Expo, taking place January 25–27 at McCormick Place in Chicago.
- [Independence: What Is It, And Why Does It Matter?](/independence-what-is-it-and-why-does-it-matter/): America celebrates the 250th anniversary of its independence on July 4, 2026. At AABC, we put independence at the forefront every single day. To AABC and its membership, independence means work without bias — the testing, adjusting, and balancing (TAB) companies who make up AABC do not have any affiliation with contractors, installers, manufacturers, or design engineering firms, allowing them to provide unbiased test and balance services without the potential for conflicts of interest.
- [AABC Members Discuss Diagnosing System Effect](/aabc-members-discuss-diagnosing-system-effect/): AABC member Cody Shook, PE, TBE, CxA breaks down “Diagnosing System EffectCommon causes & where to start” for IFMA.
- [Why Your Fan Won’t Behave: A Field Tech’s Guide to System Effect](/why-your-fan-wont-behave-a-field-techs-guide-to-system-effect/): When your fan isn’t performing as expected, the issue might not be the fan at all. In this insightful piece, AABC member Cody Shook, PE, TBE, CxA breaks down “system effect” and how real-world installations can impact fan performance in ways that aren’t always obvious.
- [Thank You for Attending The 2025 AABC Annual Meeting](/thank-you-for-attending-the-2025-aabc-annual-meeting/): Help the General Contractor Help You : TAB Preparedness, Planning and Execution
- [The Authorities in Certification to Exhibit at NFMT East](/the-authorities-in-certification-to-exhibit-at-nfmt-east/): The Associated Air Balance Council (AABC), the AABC Commissioning Group, and the Energy Management Association will exhibit at NFMT East 2026, hosted in Charlotte, NC, in booth 1814.
- [AABC Members Discuss Duct Leakage, Craftsmanship, and the Invisible Costs of Air](/aabc-members-discuss-duct-leakage-craftsmanship-and-the-invisible-costs-of-air/): In a recent article featured in ACHR News,  Mike Kelly, TBE, American Testing, shed light on duct leakage, craftsmanship, and the invisible cost of air.
- [CxEnergy 2026 Technical Program & Keynote Announced](/cxenergy-2026-technical-program-keynote-announced/): The premier event in commissioning, energy management, and building analytics and diagnostics, CxEnergy 2026, announced its technical program & keynote today. The event takes place April 21-24, 2026, in Chicago, IL at the Sheraton Grand.
- [Newly Certified TBEs and TBTs & New Member Companies who joined us in October 2024 – October 2025](/newly-certified-tbes-and-tbts-new-member-companies-who-joined-us-in-october-2024-october-2025/): We’re calling on all independent TAB firms (no affiliations with contractors, design engineers, or manufacturers) with a commitment to integrity to certify their services as Certified TBEs with the oldest and most respected testing, adjusting, and balancing association in the industry. Learn more here.
- [NFMT 2026 is Back! March 10-12, 2026 in Charlotte, NC](/nfmt-2026/): The National Facilities Management & Technology (NFMT) Tradeshow is back and heading to the Charlotte Convention Center on March 10–12, 2026. As one of the leading events for facilities professionals across the country, NFMT offers world-class education, unmatched networking, and a dynamic expo hall filled with the latest technologies and solutions shaping the future of facility operations.
- [AABC Proudly Supports CxEnergy 2026 and Participates in the Call for Abstracts](/aabc-proudly-supports-cxenergy-2026-and-participates-in-the-call-for-abstracts/): As a cornerstone of the TAB community, AABC is excited to contribute to CxEnergy 2026, the premier event in commissioning, energy management, and building analytics and diagnostics. CxEnergy 2026 issued a call for abstracts for presentations for its highly regarded technical program. The 30+ educational sessions, state-of-the-art expo hall, and professional networking opportunities take place April 21-24 at the Sheraton Grand in Chicago, IL.
- [The Authorities in Certification to Exhibit at AHR Expo](/ahr-expo-2026/): The Associated Air Balance Council (AABC), the AABC Commissioning Group, and the Energy Management Association will exhibit at AHR Expo 2026, the world’s largest HVACR marketplace, in booth C6229.
- [Newly Certified TBEs and TBTs who joined us in May – June 2025](/newly-certified-tbes-and-tbts-who-joined-us-in-may-june-2025/): We’re calling on all independent TAB firms (no affiliations with contractors, design engineers, or manufacturers) with a commitment to integrity to certify their services as Certified TBEs with the oldest and most respected testing, adjusting, and balancing association in the industry. Learn more here.
- [Newly Certified TBEs and TBTs who joined us in February – April 2025](/newly-certified-tbes-and-tbts-who-joined-us-in-february-april-2025/): All AABC member agencies must have at least one certified Test and Balance Engineer (TBE) on staff. The TBE is ultimately responsible for overseeing technical operations of the company; reviewing and certifying test and balance reports; and providing supervision and training of technicians.
- [Congratulations to New AABC Corporate Member Company!](/congratulations-to-new-aabc-corporate-member-company/): AABC stands out as the premier choice for independent testing and balancing agencies. By associating with like-minded independent firms, AABC Member Company ensures that independent TAB becomes the norm rather than the exception. Focused solely on testing and balancing, AABC prioritizes TAB without distractions from other disciplines. Choosing AABC opens doors to increased business growth, as engineers frequently specify it, leading to more bid opportunities. Additionally, AABC offers advantageous partnerships with ACG and EMA, facilitating further education, networking, and business opportunities. Welcome this new corporate member to join AABC.
- [Newly Certified TBEs and TBTs who joined us in December & January 2025](/newly-certified-tbes-and-tbts-who-joined-us-in-december-january-205/): All AABC member agencies must have at least one certified Test and Balance Engineer (TBE) on staff. The TBE is ultimately responsible for overseeing technical operations of the company; reviewing and certifying test and balance reports; and providing supervision and training of technicians.
- [AABC Eastern Regional TAB Seminar (in conjunction with NFMT 2025)](/aabc-eastern-regional-tab-seminar/): The Associated Air Balance Council (AABC) invites building operators, engineers, and commissioning providers to the AABC Eastern Regional TAB Seminar on Tuesday, March 25, 2025, at the Baltimore Convention Center – Room 324. Held in conjunction with NFMT 2025, this one-day event offers a technical deep dive into the principles and practices of Testing & Balancing (TAB) to enhance HVAC system performance and project outcomes.
- [CxEnergy 2025 Technical Program & Keynote Announced](/cxenergy-2025-technical-program-keynote-announced/): The premier event in commissioning, energy management, and building analytics and diagnostics, CxEnergy 2025, announced its technical program & keynote today. The event takes place April 28 - May 1, 2025, in Charlotte, NC at the Le Meridien Charlotte.
- [Register for 2025 AABC Annual Meeting](/save-the-date-for-2025-aabc-annual-meeting/): Set your calendars for October 22-24, 2025, for the 60th anniversary convening of the leading professionals in test and balance from around the country. The 2025 AABC Annual meeting will be held at the Omni Amelia Island Resort and Spa, located on the tip of a barrier island in northeastern Florida. This award-winning Four Diamond-rated Omni Amelia Island Resort & Spa welcomes guests to a serene location overlooking the white sands of Fernandina Beach and the Atlantic Ocean.
- [Thank You for Attending The 2024 AABC Annual Meeting](/thank-you-for-attending-the-2024-aabc-annual-meeting/): Relative Humidity Levels in Operating Rooms: The Effect on the Contamination LevelsDr. Jennifer Wagner, Onsite, LLC
- [AABC Member Breaks Down the Value of a Testing, Adjusting and Balancing Report](/aabc-member-breaks-down-the-value-of-a-testing-adjusting-and-balancing-report/): In a recent Podcast featured in Consulting-Specifying Engineer AABC Member Jeremy Johnson, TBE, CxA, American Testing Inc. gives insight on the value of a testing, adjusting, and balancing report.
- [Congratulations to New AABC Member Company!](/congratulations-to-new-aabc-member-company-2/): AABC stands out as the premier choice for independent testing and balancing agencies. By associating with like-minded independent firms, AABC ensures that independent TAB becomes the norm rather than the exception. Focused solely on testing and balancing, AABC prioritizes TAB without distractions from other disciplines. Choosing AABC opens doors to increased business growth, as engineers frequently specify it, leading to more bid opportunities. Additionally, AABC offers advantageous partnerships with ACG and EMA, facilitating further education, networking, and business opportunities. Welcome the new AABC Member Company to join.
- [Meet us at AHR Expo 2025](/meet-us-at-ahr-expo-2025/): The Associated Air Balance Council (AABC) will exhibit in booth #6263 at AHR Expo 2025, the world’s largest HVACR marketplace. The AHR Expo brings together manufacturers & suppliers of all sizes & specialties to share ideas and showcase the future of HVACR technology. It’s the industry’s best place for OEMs, engineers, contractors, facility operators, architects, educators, and other professionals to experience everything new in HVACR and build the vital relationships that grow businesses and careers. The AHR Expo is co-sponsored by ASHRAE and AHRI and is held concurrently with ASHRAE’s Winter Conference. HVACR professionals from every segment of the industry attend, including engineers, contractors, OEMs, design/build professionals, wholesalers and distributors, manufacturer’s agents and reps, architects, facility managers, public utility professionals, publishers and content producers, and educators. Join Mike Kelly, TBE, CxA, American Testing, Inc., AABC Past President as he delivers a presentation on Fundamentals of Test, Adjust, & Balance for Engineers, Cx & Energy Providers on Monday, 2/10/2025, 2:30 PM - 3:30 PM; meeting room W311AB. This practical, information-packed session explains many of the key test and balance challenges—from practical system design considerations, to the TAB Process, to obtaining meaningful and useful data—that if properly addressed in cooperation with an independent TAB firm can ensure that any project goes smoothly. Click for more details.
- [AABC TAB Technology Showcase](/aabc-virtual-tab-technology-showcase/): AABC is committed to helping people on both the service provider and building owner sides of the test & balance industry look for the latest trends and technologies.
- [Congratulations to New AABC Branch Member Company!](/congratulations-to-new-aabc-member-company/): AABC stands out as the premier choice for independent testing and balancing agencies. By associating with like-minded independent firms, AABC Member ensures that independent TAB becomes the norm rather than the exception. Focused solely on testing and balancing, AABC prioritizes TAB without distractions from other disciplines. Choosing AABC opens doors to increased business growth, as engineers frequently specify it, leading to more bid opportunities. Additionally, AABC offers advantageous partnerships with ACG and EMA, facilitating further education, networking, and business opportunities. Welcome the new branch company to join AABC.
- [Newly Certified TBEs who joined us in February – March](/newly-certified-tbes-who-joined-us-in-feb-march/): All AABC member agencies must have at least one certified Test and Balance Engineer (TBE) on staff. The TBE is ultimately responsible for overseeing the technical operations of the company; reviewing and certifying test and balance reports, and providing supervision and training of technicians.
- [Save the Date for 2024 AABC Annual Meeting](/save-the-date-2024-aabc-annual-meeting/): Set your calendars for October 9-11, 2024, for the annual convening of the leading professionals in test and balance from around the country. The 2024 AABC Annual meeting will be held at the Hyatt Lost Pines Resort and Spa, an exceptional venue near Austin, Texas, that offers stellar accommodations, luxurious amenities, and a variety of activities for attendees and their families. We look forward to seeing you there!
- [AABC Members Discuss Creating Better HVAC Systems in Old Laboratories and University Buildings](/aabc-members-discuss-creating-better-hvac-systems-in-old-laboratories-and-university-buildings/): In a recent article featured in Consulting-Specifying Engineer AABC Members, Brian Venn, TBE, CxA, Mechanical Testing, Inc., Jeremy Johnson, TBE, CxA, American Testing Inc., and Thomas Prevish, Ph. D., PE, CEM, NorthWest Engineering Service Inc., gives insight on creating better HVAC systems in old laboratories and university buildings.
- [AABC Members Discuss Pump Optimization: Achieving Peak Performance in HVAC Systems](/aabc-members-discuss-pump-optimization/): In a recent PODCAST  featured in Engineered Systems,  Muslim F. Nazarali, TBE, and Soham Neupane from IMI Hydronic Engineering Inc., shed light on the significance of pump optimization and its profound impact on enhancing HVAC system performance.
## Pages
- [2026 Fall TAB Journal Quiz](/2026-fall-tab-journal-quiz/): Franklyn J. Andujar, TBT
- [AABC Annual Meeting: Will You Still Be Joining Us for Dinner?](/annual-meeting-dinner-confirmation/): AABC Annual Meeting: Will You Still Be Joining Us for Dinner? We’re finalizing our dinner plans for the AABC Annual Meeting and would appreciate a quick confirmation from you. Please let us know whether you’ll be joining us for the Annual Closing Reception & Celebration. Your response will help us plan the dinner count accurately and minimize food waste.Name(Required) First Last Email(Required) Will you be attending the Annual Closing Reception & Celebration?(Required) Yes, I'll be there No, I won't be attending Submit Δ
- [AABC TAB Talk September 2026 Quiz: Reverse Return Piping Gone Wrong](/aabc-tab-talk-september-2026-quiz-reverse-return-piping-gone-wrong/): AABC TAB Talk September 2026 – Reverse Return Piping Gone Wrong Quiz Step 1 of 11 9% Name(Required) First Last Email(Required) Which statement best describes the operating principle of a reverse-return piping system?(Required) The first unit supplied is intended to be the last unit returned. The first unit supplied is also the first unit returned. All units must have identical pipe sizes. The return piping must always be smaller than the supply piping. Reverse return eliminates the need for balancing. Next What is a primary engineering tradeoff when choosing reverse return instead of direct return?(Required) Reverse return always requires smaller pumps. Reverse return generally requires more piping, space, labor, and coordination. Reverse return eliminates all balancing valves. Reverse return always has a lower first cost. Reverse return requires no commissioning. Previous Next Why should a reverse-return system not be considered automatically 'self-balancing'?(Required) Pump speed never changes in a reverse-return system. Equipment pressure drops, valves, fittings, and field conditions can still vary. Reverse-return systems have no return piping. Only direct-return systems require design GPM values. All heat pumps always have the same pressure drop. Previous Next During the January 7, 2011 testing, which rooms were found to have little to no condenser-water flow?(Required) 328, 428, and 528 329, 429, and 529 328, 529, and 1127 429, 528, and 1127 328, 329, and 428 Previous Next What was the design flow for Riser 10 identified during the January 20 follow-up?(Required) 22.5 GPM 32.7 GPM 37.9 GPM 44.5 GPM 60.0 GPM Previous Next What made Riser 10 especially suspicious during the troubleshooting process?(Required) The riser had no measurable total flow. The riser showed approximately 60 GPM fully open while individual heat-pump flows remained low. Every heat pump on the riser was above design flow. The riser had been removed from the mechanical drawings. The cooling tower was not operating. Previous Next Which troubleshooting step was essential to moving from low-flow symptoms to the root-cause theory?(Required) Increase pump speed until room temperatures improve. Replace all heat-pump compressors. Compare the flow pattern with the mechanical drawings and investigate possible crossover locations. Ignore individual equipment flow if total riser flow is acceptable. Close all balancing valves on adjacent risers. Previous Next Where was the crossed supply and return piping ultimately located?(Required) Room 1127 Room 828 Room 529 Room 129 The penthouse Previous Next What does this case demonstrate about using total riser flow as proof of system performance?(Required) Correct riser flow proves every heat pump is receiving design flow. Riser flow is only useful on direct-return systems. Total riser flow does not prove that flow is correctly distributed to individual equipment. Individual heat-pump measurements are unnecessary when the riser is balanced. A riser should always be operated fully open. Previous Next Which statement best captures the final lesson of the case study?(Required) If equipment is operating, the piping installation must be correct. Reverse-return piping eliminates the need for commissioning. A system operating does not mean the system is operating correctly; measure, understand, and verify the system. Comfort complaints are usually unrelated to water flow. Replacing failed components is more important than investigating system configuration. Previous Next Previous Submit Quiz Δ
- [TAB Journal Submission Guidelines](/tab-journal-submission-guidelines/): Any AABC-certified test and balance engineer (TBE) or technician (TBT) is encouraged to submit an article to be considered for publication in TAB Journal at any time. Every two years, each AABC member company is required to submit at least one article as part of their certification requirements. Authors who submit articles over 500 words are eligible to earn 5 CEU points.
- [AABC TAB Talk Speaker Form](/aabc-tab-talk-speaker-form/): AABC TAB Talk Speaker Form Name(Required) First Last Email(Required) Enter Email Confirm Email Phone(Required) Country Phone Number Backup Phone NumberThe number we can contact if you are out of reach Country Phone Number Bio(Required)2-3 sentences about yourself to introduce you to webinar attendeesI confirm I will be participating and presenting at AABC TAB Talk webinar(Required) Confirm Submit Δ
- [AABC TAB Talk August 2026 Quiz: TAB in the Real World – An Approach to HVAC Systems That Don’t Follow the Rules](/aabc-tab-talk-august-2026-quiz-tab-in-the-real-world-an-approach-to-hvac-systems-that-dont-follow-the-rules/): AABC TAB Talk August 2026 – TAB in the Real World: An Approach to HVAC Systems That Don’t Follow the Rules Quiz Step 1 of 11 9% Name(Required) First Last Email(Required) What did the presentation describe as the meaning of “Test” in Test & Balance?(Required) Testing flows & Pressures to determine what needs to be balanced. Testing flows & Pressures and Testing the system to make sure they are ready to be balanced. Testing systems to be balanced to make sure they are ready to be balanced. Next What is the major issue with air balancing air distribution that is added to an existing system without flow values for the existing system?(Required) The new air distribution will lower the air flow for every grille in the existing system and the new air distribution grilles will probably not make design flow. There is no issue the new air distribution should be balanced as usual. There is no issue the correct procedure is to increase the existing AHU flow by an amount equal to the new air distribution to provide air to the new grilles. Previous Next What is one reason a VAV box may have been oversized?(Required) Box was installed incorrectly. Oversized VAV boxes are not a problem because they are calibrated for actual flow conditions. Owner has requested larger boxes to facilitate future load. System pressure is much higher than anticipated by the designer. Previous Next When over speeding an induction fan motor what is one of the most important items to verify?(Required) That the tip speed of the fan wheel is not exceeded. That the noise from the fan with higher speed is not objectionable. That the increase in speed increases the motor torque beyond the motor rating. Previous Next How should balance valves be sized?(Required) Balance valves should be sized on Cv or sized so the balanced position is not near valve close off. Balance valves are sized to equal the pipe size. Balance valves are sized on velocity at full flow. Previous Next Automatic flow balance valves provide what main characteristic?(Required) Total pressure independent flow. Pre balanced to always provide the correct flow to the coil. Between the minimum and maximum pressure rating of the spring the valve operates as a pressure independent valve but as a fixed orifice outside of pressure rating. Previous Next What is the recommended method to be used to verify auto flow valves are working correctly?(Required) Verify that the supply pipe pressure is below the maximum pressure for the valve Verify that the supply pipe pressure is above the maximum pressure for the valve. Verify that the supply pipe pressure is within the pressure range of the valve for both the highest pressure and lowest pressure valves. Previous Next What is a common reason for some central plant decouplers to be construction incorrectly?(Required) Confusion between the pipe diagram and the actual layout in the field where the pipe routing does not resemble the diagram. Lack of knowledge of the installing pipe fitters. Lack of knowledge of the designers. Previous Next What happens when the decoupler is piped incorrectly and the primary pumps into the decoupler instead of into the chillers?(Required) The secondary return water and the primary pump water both flow through the decoupler doubling flow and increasing the system pressure and lowering total flow. The flow in the decoupler reverses, starving the secondary pumps. The flow in the decoupler decreases due to competing pump pressure. Previous Next What problem do bull head tees cause if pipe velocity is high enough?(Required) Bull head tees cause water noise when flowing with enough velocity. Bull head tee outlet pressure changes substantially limiting flow depending upon the % flow of the branch, disrupting balanced flow to chillers and towers. Bull head tees cause low pressure flow in the fitting when velocity is high enough. Previous Next Previous Submit Quiz Δ
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- [AABC National Standards for Total System Balance, 8th Edition](/national-standards/): After undergoing a comprehensive revision and American National Standards Institute (ANSI) approval process, the 8th edition AABC Standards offer the most updated guidance and requirements for Total System Balance.
- [2026 Fall AABC TAB Technology Attendee Registration](/2026-fall-aabc-tab-technology-attendee-registration/): By registering, you agree AABC can share your contact information with the TAB Technology Showcase sponsors.
- [2026 Fall AABC TAB Technology Showcase Sponsorship](/2026-fall-aabc-tab-technology-showcase-sponsorship/): 2026 Fall AABC Virtual Technology Showcase Sponsor InstagramThis field is for validation purposes and should be left unchanged.Enter your informationName(Required) First Last Job Title(Required)Phone Number(Required)Email Address(Required) Company Name(Required)Company Logo(Required)Max. file size: 50 MB. Company Description and What will You Showcase?(Required)Payment Information2026 Fall AABC TAB Technology Showcase Sponsor(Required) Price: Credit Card American ExpressDiscoverMasterCardVisaSupported Credit Cards: American Express, Discover, MasterCard, Visa Card Number Expiration Date Month Month010203040506070809101112 Year Year20262027202820292030203120322033203420352036203720382039204020412042204320442045   Security Code Cardholder Name Billing Address(Required) Street Address Address Line 2 City State / Province / Region ZIP / Postal Code AfghanistanÅland IslandsAlbaniaAlgeriaAmerican SamoaAndorraAngolaAnguillaAntarcticaAntigua and BarbudaArgentinaArmeniaArubaAustraliaAustriaAzerbaijanBahamasBahrainBangladeshBarbadosBelarusBelgiumBelizeBeninBermudaBhutanBoliviaBonaire, Sint Eustatius and SabaBosnia and HerzegovinaBotswanaBouvet IslandBrazilBritish Indian Ocean TerritoryBrunei DarussalamBulgariaBurkina FasoBurundiCabo VerdeCambodiaCameroonCanadaCayman IslandsCentral African RepublicChadChileChinaChristmas IslandCocos IslandsColombiaComorosCongoCongo, Democratic Republic of theCook IslandsCosta RicaCôte d'IvoireCroatiaCubaCuraçaoCyprusCzechiaDenmarkDjiboutiDominicaDominican RepublicEcuadorEgyptEl SalvadorEquatorial GuineaEritreaEstoniaEswatiniEthiopiaFalkland IslandsFaroe IslandsFijiFinlandFranceFrench GuianaFrench PolynesiaFrench Southern TerritoriesGabonGambiaGeorgiaGermanyGhanaGibraltarGreeceGreenlandGrenadaGuadeloupeGuamGuatemalaGuernseyGuineaGuinea-BissauGuyanaHaitiHeard Island and McDonald IslandsHoly SeeHondurasHong KongHungaryIcelandIndiaIndonesiaIranIraqIrelandIsle of ManIsraelItalyJamaicaJapanJerseyJordanKazakhstanKenyaKiribatiKorea, Democratic People's Republic ofKorea, Republic ofKuwaitKyrgyzstanLao People's Democratic RepublicLatviaLebanonLesothoLiberiaLibyaLiechtensteinLithuaniaLuxembourgMacaoMadagascarMalawiMalaysiaMaldivesMaliMaltaMarshall IslandsMartiniqueMauritaniaMauritiusMayotteMexicoMicronesiaMoldovaMonacoMongoliaMontenegroMontserratMoroccoMozambiqueMyanmarNamibiaNauruNepalNetherlandsNew CaledoniaNew ZealandNicaraguaNigerNigeriaNiueNorfolk IslandNorth MacedoniaNorthern Mariana IslandsNorwayOmanPakistanPalauPalestine, State ofPanamaPapua New GuineaParaguayPeruPhilippinesPitcairnPolandPortugalPuerto RicoQatarRéunionRomaniaRussian FederationRwandaSaint BarthélemySaint Helena, Ascension and Tristan da CunhaSaint Kitts and NevisSaint LuciaSaint MartinSaint Pierre and MiquelonSaint Vincent and the GrenadinesSamoaSan MarinoSao Tome and PrincipeSaudi ArabiaSenegalSerbiaSeychellesSierra LeoneSingaporeSint MaartenSlovakiaSloveniaSolomon IslandsSomaliaSouth AfricaSouth Georgia and the South Sandwich IslandsSouth SudanSpainSri LankaSudanSurinameSvalbard and Jan MayenSwedenSwitzerlandSyria Arab RepublicTaiwanTajikistanTanzania, the United Republic ofThailandTimor-LesteTogoTokelauTongaTrinidad and TobagoTunisiaTürkiyeTurkmenistanTurks and Caicos IslandsTuvaluUgandaUkraineUnited Arab EmiratesUnited KingdomUnited StatesUruguayUS Minor Outlying IslandsUzbekistanVanuatuVenezuelaViet NamVirgin Islands, BritishVirgin Islands, U.S.Wallis and FutunaWestern SaharaYemenZambiaZimbabwe Country Promo Code Total Submit Δ
- [2026 Fall AABC TAB Technology Showcase](/2026-fall-aabc-tab-technology-showcase/): The Associated Air Balance Council (AABC) is dedicated to advancing the testing, adjusting, and balancing (TAB) industry by bringing together service providers, building owners, and industry experts to explore emerging technologies and best practices. The TAB Technology Showcase offers a unique opportunity to see innovative solutions in action, gain insights directly from technology leaders, and stay ahead in an increasingly complex built environment.
- [Author](/author-3/)
- [AABC TAB Talk: UV-C Light Safety](/aabc-tab-talk-uv-c-light-safety/): "*" indicates required fields
- [AABC TAB Talk: Reverse Return Piping Gone Wrong](/aabc-tab-talk-reverse-return-piping-gone-wrong-2/): "*" indicates required fields
- [2026 AABC Annual Meeting Technical Program](/2026-aabc-annual-meeting-technical-program/): Dallin Cooper
- [2026 Summer TAB Journal Quiz](/2026-summer-tab-journal-quiz/): Octavio Tenorio, TBE
- [AABC TAB Talk July 2026 Quiz: Difficult Designs: Systems That Make TAB a Challenge](/aabc-tab-talk-july-2026-quiz-difficult-designs-systems-that-make-tab-a-challenge/): AABC TAB Talk July 2026 – Difficult Designs: Systems That Make TAB a Challenge Quiz Step 1 of 11 9% Name(Required) First Last Email(Required) When supply air units are served outside air (OA) via a common intake duct:(Required) "OA" may actually flow backwards OA may vary depending on what other connected units are doing Design OA may not be achievable All of the above Next What is the best practice to achieve an accurate and reliable OA flow?(Required) Be sure to install the largest OA ductwork space will permit Install only small ductwork for small airflow quantities Install a dedicated duct run/roof penetration per supply air unit Install a booster fan in each duct run Previous Next Which of the following are problematic for supply air units ducted directly to a dedicated outside air supply (DOAS)? (Choose all that apply)(Required) Supply units often have short duct runs from the DOAS that must be traversed (unsuitable for traverse) Proportioning each duct run from the DOAS is difficult and time consuming Connecting the DOAS ducts directly to a supply air unit makes sure fresh air gets evenly distributed to the spaces All supply air units need to run simultaneously at design speeds for a prolonged period Previous Next Which of the following is a better alternative to distributing fresh air to spaces? (Choose all that apply)(Required) Duct fresh air from the DOAS into the spaces via ceiling diffusers Stub fresh air ducts above ceilings near the return intake of small supply units Stub one large duct from the DOAS into the ceiling space and let the air “gravity feed” thru transfer grilles Let fresh air in through open windows to save energy in lieu of installing DOAS units. Previous Next Which of the following are common problems with opposed blade face dampers as the only means of adjustment for grilles?(Required) Air velocity noise and whistling can occur if closed too far If pressure is high enough, the dampers may slam shut if closed more than 50% Some grilles with the largest airflow/air pressure may need to be completely closed and still be above design airflow, thus not pushing airflow where needed All of the above Previous Next What are some common items we must test and/or get data on that are completely enclosed within a unit? (Choose all that apply)(Required) Fan motor nameplate amperage rating (seldom found in submittal data) Fan and motor speed Fan speed adjustment External static pressures Previous Next What actions would expedite project completion and assure a more efficient and accurate TAB experience regarding the above mentioned test items?(Required) Selection of units with the needs of the startup technician, balancer, and end user in mind Put all essential data in the submittals, especially motor nameplate ratings, and/or put rated amperage on the unit name tag Ensure that speed controls for fans be mounted outside the unit and be easily accessible All of the above Previous Next As technology continues to advance: (Choose all that apply)(Required) Systems get much easier to work on Air balancers are becoming unnecessary Systems become more complex and are a challenge to everyone involved in the process Care should be taken in the design and selection of units so they are simple enough that everyone from installers to the end users can work with them effectively as intended Previous Next To record accurate test measurements and make the correct adjustments, it is IMPERATIVE that balancers:(Required) Be able to establish a static operating condition on units Be able to manipulate controls to lock dampers, fan speeds, and valve positions to design conditions Not have to spend excessive time figuring out complex sequences and control override codes All of the above Previous Next When designing a system to circulate water through the chillers and the building loop, it is best to:(Required) Have one pump on a drive and one pump circulating through a bypass valve Save money by installing only one pump to circulate to both chiller and building loop Install a primary/secondary pump system so both building and chillers have their own controlled flows None of the above Previous Next Previous Submit Quiz Δ
- [AABC TAB Talk June 2026 Quiz: Digital Solutions For TAB Firms: The Next Chapter With TABopts](/aabc-tab-talk-june-2026-quiz-digital-solutions-for-tab-firms-the-next-chapter-with-tabopts/): AABC TAB Talk June 2026 – Digital Solutions For TAB Firms: The Next Chapter With TABopts Quiz Step 1 of 11 9% Name(Required) First Last Email(Required) What benefits are gained from implementing a digital platform for TAB Firms?(Required) Increase in Firm Efficiency Increase in Firm Effectiveness Increase in Firm Productivity All of the Above Next What are the benefits of using a digital take off system?(Required) Counts are accumulated automatically. The original PDF is utilized Results can be shared with all users. All of the Above Previous Next What are the benefits of using a digital Project Management system ?(Required) Tracking of Bid Requests & Quotes Managed Awarded Projects Numerous report generation All of the Above Previous Next What are the benefits of using a digital Reporting system?(Required) Near real time data collection/submission Near real time discrepancy list Ease of report compilation All of the Above Previous Next What are the benefits of using a digital Time / Expense Tracker?(Required) Employees can log hours in real time. Expenses can be tracked in real time. Employees can request time off. All of the Above Previous Next What problems may arise if you do not use a digital take off system?(Required) Manual process is labor Intensive Manual Positive financial impact to the firm All of the Above Previous Next What problems may arise if you do not use a digital project management system?(Required) Cloud Based Systems Lose control of the project Project documents are current All of the Above Previous Next What problems may arise if you do not use a digital reporting system?(Required) Delays in Report Certification / Project Turn Over Paper Certified Reports are easy to keep track of Fewer hours expended to review, certify, and submit a Certified Report All of the Above Previous Next What problems may arise if you do not use a digital time / expense tracking system?(Required) Payroll is processed on time Manual Time Expense Sheets ae eaier to keep track of Job costing could be applied to the wrong project or delayed. All of the Above Previous Next Why is implementing digital work flows important for TAB Firms?(Required) Manpower is plentiful and readily available Standardization across all offices, departments, or divisions Digital Platforms are cost prohibited All of the Above Previous Next Previous Submit Quiz Δ
- [2026 AABC Annual Meeting Technical Program](/2026-aabc-annual-meeting-technical-program-2/): Dallin Cooper
- [Author](/author-2/)
- [AABC TAB Talk: Reverse Return Piping Gone Wrong](/aabc-tab-talk-reverse-return-piping-gone-wrong/): "*" indicates required fields
- [AABC TAB Talk May 2026 Quiz: Using TAB Experience to Troubleshoot Performance Issues](/aabc-tab-talk-may-2026-quiz-using-tab-experience-to-troubleshoot-performance-issues/): AABC TAB Talk May 2026 Quiz: Using TAB Experience to Troubleshoot Performance Issues Step 1 of 11 9% Name(Required) First Last Email(Required) What tools are NOT commonly used for troubleshooting air issues?(Required) Micromanometer Camera Smoke Pencil Tachometer Next When troubleshooting a system with reduced airflow, consider verifying the fan motor________.(Required) Rotation Brand HP Frame Previous Next On a draw-through CHW coil, leakage at the _________ can cause condensation issues inside the AHU.(Required) Drain Access Doors Hose bib Fan Previous Next Direct-drive exhaust fans can benefit a design/operation due to:(Required) Fewer belts to maintain Airflow flexibility (if ECM or on a VFD) Less expensive to purchase new Both A and B Previous Next _____ _______, when properly installed, can help maintain consistent room pressures.(Required) Pressure taps Door Sweeps Exhaust grilles Room thermostat Previous Next Airflow monitoring stations require___________________(Required) proper inlet conditions to be accurate/reliable regular cleaning/maintaince filters Both A and B Previous Next What issues can a opposed blade damper mounted directly on the grille cause?(Required) noise unreliable / moves over time collect dust / debris All of the above Previous Next When an AHU is no longer delivering expected airflow, what is the first recommended step?(Required) Replace the fan motor rebalance the entire system start with simple checks increase the static pressure setpoint Previous Next In a fan array system, what could cause airflow issues due to internal bypass?(Required) Dirty cooling coil Unsealed wall between suction and discharge High static pressure setpoint Low chilled water temperature Previous Next Why is it important for TAB professionals to communicate with facility managers?(Required) To assign blame To share knowledge and improve future troubleshooting To reduce workload To avoid repeat visits Previous Next Previous Submit Quiz Δ
- [2026 AABC Annual Meeting Activities](/2026-aabc-annual-meeting-activities/): Regatta Bay Golf & Yacht Club465 Regatta Bay Blvd, Destin, FL 32541.
- [2026 AABC Annual Meeting Attendee Registration](/2026-aabc-annual-meeting-attendee-registration/)
- [AABC TAB Talk: Digital Solutions for TAB Firms – The Next Chapter With TABopts](/aabc-tab-talk-digital-solutions-for-tab-firms-the-next-chapter-with-tabopts/): "*" indicates required fields
- [AABC TAB Talk: TAB in the Real World: An Approach to HVAC Systems That Don’t Follow the Rules](/aabc-tab-talk-tab-in-the-real-world-an-approach-to-hvac-systems-that-dont-follow-the-rules/): "*" indicates required fields
- [In Search of the Healthy Classroom](/in-search-of-the-healthy-classroom-2/): AABC TAB Talk April 2026 Quiz: In Search of the Healthy Classroom Step 1 of 11 9% Name(Required) First Last Email(Required) What were the 3 key areas to assess for proper classroom performance?(Required) Filtration Air Distribution Ventilation All of the Above Next What is the recommended timeframe to change filters so that sufficient airflow is maintained?(Required) Every Month Every 6 Months Every 3-4 Months When there is a complaint Previous Next What is the recommended MERV rating for filters in the classroom setting?(Required) MERV-13 MERV-10 MERV-17 MERV-8 Previous Next Why is it important to test performance of a system after installing MERV-13 filters?(Required) The performance will not change. To assure the system is maintaing sufficient airflow with the increased pressure drop. To make my customer happy. It is not recommended to test performance after changing filters. Previous Next What was a common deficiency found that lead to inadequate airflow?(Required) Broken Belt Dirty Filters No deficiencies were found A & B Previous Next What percentage of Power Exhaust fans found during the assessments were found not to be properly set up and functioning?(Required) 50% 10% 90% 25% Previous Next What is the baseline occupancy used for calculating recommended outdoor air rates in Elementary Schools?(Required) 25 35 20 15 Previous Next Should Outside Air be left greater than 10% of the recommended airflow rate?(Required) There is no problem leaving the Outdoor Air greater than 10% of the recommended rate. No, it can lead to temperature and humidity issues as well as increased energy consumption. Yes, increasing the Outside Air will have no affect on the system. All of the Above Previous Next What percentage of units were achieving or able to be adjusted to achieve their total recommended airflow specified by the unit manufacturer?(Required) 50% 30% 80% 60% Previous Next What was a common deficiency found when testing Economizers/OSA dampers?(Required) Broken Linkage on OSA damper/actuator There were no deficiencies Undersized OSA openings A & C Previous Next Previous Submit Quiz Δ
- [2026 Spring TAB Journal Quiz](/2026-spring-tab-journal-quiz/): Jared Kapoor, TBE, Arizona Air Balance Company
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- [AABC TAB Talk: Difficult Designs: Systems That Make TAB a Challenge](/aabc-tab-talk-difficult-designs-tab-challenges/): "*" indicates required fields
- [Diagnosing System Effect Common Causes & Where to Start Quiz](/diagnosing-system-effect-common-causes-where-to-start-quiz/): AABC TAB Talk March 2026 Quiz: Diagnosing System Effect Common Causes & Where to Start Step 1 of 10 10% Name(Required) First Last Email(Required) A fan underperforming design conditions is always a byproduct of system effect.(Required) True False Next The area to the left of the "do not select" curve is also commonly referred to as(Required) The System Effect region The surge or stall region The unstable area The gray area Peak performance region Previous Next Low airflow and Low Static are a common fan law relationship and rule out the possibility of system effect.(Required) True False Previous Next Which of the following do NOT contribute to system effect and unstable fan performance?(Required) Turbulent airflow at the inlet. Turbulent airflow at the outlet. Abrupt duct transitions Laminar airflow at the inlet Field modified duct connections. Previous Next Before diagnosing or quantifying systemm effect, which of the following are need to be measured.(Required) Total airflow Total static Brake horsepower Fan RPM All of the above Previous Next A fan LOW on airflow but above design brake horsepower (BHP) may be a symptom of system effect.(Required) True False Previous Next An outlet duct installed counter to the direction of fan rotation is an example of which type of issue?(Required) Belt slippage System effect due to poor outlet configuration Over-speed condition Motor phase imbalance Insufficient duct insulation Previous Next Which of the following is TRUE regarding turning vanes in ductwork?(Required) Turning vanes are only necessary on supply-side ductwork Turning vanes installed backwards can worsen flow patterns rather than improve them Turning vanes eliminate all system effect losses Turning vanes are not referenced in any AMCA publications Turning vanes should only be installed by the fan manufacturer Previous Next Per AMCA guidelines, what is the recommended minimum straight duct length at the fan outlet for full velocity pressure recovery?(Required) 1 equivalent duct diameter 2.5 to 6 equivalent duct diameters 10 equivalent duct diameters No straight duct is required if turning vanes are present It depends entirely on the fan manufacturer Previous Next Previous Submit Quiz Δ
- [Author](/author/)
- [2025 AABC Hall of Fame Modern Inductees Quiz](/2025-aabc-hall-of-fame-modern-inductees-quiz/): AABC TAB Talk February 2026 Quiz: The TAB Industry: Where It’s Been and Where It’s Going (A Conversation with 2025 AABC Hall of Fame Modern Inductees) Step 1 of 11 9% Name(Required) First Last Email(Required) What is the main focus of this TAB Talk session?(Required) New HVAC equipment launches Sales strategies for contractors Career stories and the future of TAB Building automation software Energy rebate programs Next Why is independent TAB emphasized throughout the session?(Required) It reduces project timelines It ensures unbiased system verification It lowers construction costs It replaces commissioning It eliminates testing Previous Next What type of experiences do the speakers mainly share?(Required) Software troubleshooting tips Manufacturing challenges Real-world TAB project lessons Sales techniques Marketing strategies Previous Next According to the discussion, TAB plays a key role in:(Required) Architectural design Equipment manufacturing System performance and design intent Energy rebates Building security Previous Next What is one theme repeated by the speakers?(Required) Speed is more important than accuracy Independent verification protects building owners Automation replaces TAB TAB is only for large buildings TAB is a final checklist item Previous Next What do the speakers say is important for long-term success in TAB?(Required) Fast installation Lowest bid Strong ethics and professionalism Expensive tools Marketing skills Previous Next What does the session suggest about the future of TAB?(Required) It will become less important It will be fully automated It will continue to be critical as buildings grow more complex It will only be needed for hospitals It will merge with architecture Previous Next What is one reason TAB professionals must communicate their value clearly?(Required) To be seen as essential project partners To increase equipment sales To replace commissioning agents To reduce labor costs To avoid documentation Previous Next What is a key takeaway for new professionals entering TAB?(Required) Focus only on speed Learn sales before technical skills Avoid field work Build experience, integrity, and technical knowledge Specialize only in one system Previous Next What is one reason the speakers say TAB remains important today?(Required) It speeds up construction It reduces material costs It replaces HVAC design It eliminates the need for maintenance It verifies building systems work as intended Previous Next Previous Submit Quiz Δ
- [2026 AABC Virtual TAB Technology Showcase](/2026-aabc-virtual-tab-technology-showcase-reg/)
- [2026 AABC Annual Meeting Abstract](/2026-aabc-annual-meeting-abstract/): 2026 AABC Annual Meeting Abstract Submission Form Name(Required) First Last Credentials(For example, TBE, TBT, CxA, EMP, P.E. etc.)Company Name(Required)City(Required)State(Required)Email Abstract InformationProposed Title of Presentation(Required)(maximum 25 words)Short Abstract(Required)(maximum 80 words or 400 characters)Learning objective 1(Required)At the end of this session, the attendees will be able to..Learning objective 2(Required)At the end of this session, the attendees will be able to..Learning objective 3(Required)At the end of this session, the attendees will be able to..Learning objective 4(Required)At the end of this session, the attendees will be able to..Presentation Level(Required) Entry Level Intermediate Advanced AI Policy:(Required) I certify that I am the creator of the submitted presentation and related materials and that any use of artificial intelligence in creating these materials adheres to AABC's AI Use Policy. This means that AI tools were not used in creating this material beyond research, brainstorming, and revision; that no intellectual property or private information belonging to another author was submitted to a generative AI tool in the process of creating this work; and that no portion of this work was copied directly from an AI-generated output. If any of the above is not true of these materials, I will accurately disclose the role that AI had in creating this content. I understand that my submitted work is subject to review and approval by AABC. Presenter InformationSpeaker bioSpeaker photoMax. file size: 50 MB. (jpg or jpeg file only, max file size: 5MB)Will you have a co-presenter?(Note: Co-Presentation with an owner’s representative will be reviewed more favorably by the Program Committee)Additional information/comment Submit Δ
- [Register Now for 2026 AABC Annual Meeting](/2026-aabc-annual-meeting/): Set your calendars for October 13-15, 2026, for the convening of the leading professionals in test and balance from around the country. The 2026 AABC Annual meeting will be held at the Henderson Beach Resort, located in Destin Florida. Discover the timeless romance of Henderson Beach Resort on Florida’s Emerald Coast, where Southern charm meets modern luxury. A place to reconnect, unwind, and create lasting memories you’ll return to year after year.
- [2026 Winter TAB Journal Quiz](/2026-winter-tab-journal-quiz/): Vincent Ciccarella, TBE
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Grid 5 Energy 2000 Technical Engineering Co., Ltd. Bio : Ph: (822) 408-2114 Mr. Ye Haeng Lee, TBE, CxA Mr. Seong Jae Moon, TBE Mr. Sang-Yeol Yoon, TBE Kahoe Air Balance Company (Columbus) Bio : Ph: (614) 694-2558 Mr. Anderson J. Steiskal, TBE Mr. Robert M. Durosko, TBE AABCAppDev AABCMarketing Air Balance Co., Inc. Bio : Ph: (626) 339-4700 Mr. Jonathan D. Littleton, TBE Mr. Jeffrey Wicka, TBE, CxA Mr. Justin Allen, TBE Mr. Hunter Mauracooper, TBE Mr. Justin A. Chapman, TBE   Test and Balance Corp. of the Pacific Bio : Ph: (808) 593-1924 Mr. Paul Morse, TBE, CxA American Air Balance Co., LLC Bio : Ph: (714) 693-3700 Mr. Michael J. Totten, TBE Mr. Robert Conboy, TBE, CxA Mr. Keith Suzuki, TBE, CxA Mr. Robert Conboy Jr., TBE Mr. James P. Kreiss, TBE Air & Water Precision Balancing Inc. Bio : Ph: (647) 896-5353 Mr. Matthew Crittenden, TBS Air Balance Unlimited, Inc. Bio : Ph: (407) 383-8259 Mr. Timothy Howell, TBE Mr. Michael Howell, TBE Mr. Chad C. Howell, TBE Testing & Balancing Co. of the Ozarks, LLC (TABCO) Bio : Ph: (417) 443-4430 Mr. Bryan R. Baker, TBE Posts navigation 123…23Older posts
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## Products
- [AABC National Standards for Total System Balance 8th Edition (BOOK & PDF)](/product/aabc-national-standards-for-total-system-balance-8th-edition-book-pdf/): Hardcover, 454 pages AND fully searchable PDF List price: $185.00 NOTE: This is for the hardcover current edition of the AABC National Standards as well as a digital copy in PDF format. After undergoing a comprehensive revision, the 8th Edition of AABC’s National Standards for Total System Balance is now available! The AABC National Standards for Total System Balance is the comprehensive manual for the test and balance industry. It details the minimum standards for total system balance, assists design professionals in achieving design intent, provides a better understanding of the scope of work required of the TAB agency, and ensures that proper methods and procedures are followed in the test and balance process. This is the second edition to achieve designation as an approved American National Standard through ANSI.
- [AABC National Standards for Total System Balance, 8th edition (Hardcover)](/product/aabc-national-standards-for-total-system-balance-8th-edition-hardcover-2/): 8th edition, 454 pages Hardcover After undergoing a comprehensive revision, the 8th Edition of AABC’s National Standards for Total System Balance is now available! The AABC National Standards for Total System Balance is the comprehensive manual for the test and balance industry. It details the minimum standards for total system balance, assists design professionals in achieving design intent, provides a better understanding of the scope of work required of the TAB agency, and ensures that proper methods and procedures are followed in the test and balance process. This is the second edition to achieve designation as an approved American National Standard through ANSI.
- [AABC National Standards for Total System Balance, 8th edition PDF](/product/aabc-national-standards-for-total-system-balance-8th-edition-pdf/): 8th edition, PDF, 454 pages Click Here to Purchase Hardcover Version After undergoing a comprehensive revision, the 8th Edition of AABC’s National Standards for Total System Balance is now available! The AABC National Standards for Total System Balance is the comprehensive manual for the test and balance industry. It details the minimum standards for total system balance, assists design professionals in achieving design intent, provides a better understanding of the scope of work required of the TAB agency, and ensures that proper methods and procedures are followed in the test and balance process. This is the second edition to achieve designation as an approved American National Standard through ANSI.
- [TEST Equation Quick Guide](/product/test-equation-quick-guide/): The Equation Quick Guide covers fan laws, sheave sizing, density, humidification, psychrometric properties of air and water, pump laws, cooling towers, and electrical equations. It also includes, duct calculations, electrical distribution systems, conversion factors, altitude correction factors, suggested terminal unit primary inlet velocities, and a velocity pressure conversion table for standard air. This high-quality guide features a tabbed structure for quick reference, durable construction, and provides reader-friendly content in an easy to carry format.
- [AABC National Standards for Total System Balance (Member)](/product/aabc-national-standards-for-total-system-balance-member/): 7th edition, hardcover, 550 pages List price: $85.00 Member price: $40.00 Click Here to Purchase Hardcover Version The 7th Edition of AABC National Standards for Total System Balance is now available! Completely rewritten and reorganized, the Standard is also the first AABC standard to achieve designation as an approved American National Standard through ANSI. This comprehensive manual details the minimum standards for total system balance. The Standards will assist the design professional in achieving design intent, provide a better understanding of the scope of work required of the TAB agency, and ensure that proper methods and procedures are followed in the test and balance process.
- [AABC National Standards for Total System Balance BOOK & PDF (Member)](/product/aabc-national-standards-for-total-system-balance-book-pdf-member/): Hardcover, 550 pages AND fully searchable PDF List price: $125.00 NOTE: This is for the hardcover current edition of the AABC National Standards as well as a digital copy in PDF format. The 7th Edition of AABC’s National Standards for Total System Balance is now available! Completely rewritten and reorganized, the Standard is also the first AABC standard to achieve designation as an approved American National Standard through ANSI. This comprehensive manual details the minimum standards for total system balance. The Standards will assist the design professional in achieving design intent, provide a better understanding of the scope of work required of the TAB agency, and ensure that proper methods and procedures are followed in the test and balance process.
- [AABC National Standards for Total System Balance Hardcover (Member)](/product/aabc-national-standards-for-total-system-balance-hardcover-member/): 7th edition, 550 pages Hardcover or PDF The 7th Edition of AABC’s National Standards for Total System Balance is now available! Completely rewritten and reorganized, the Standard is also the first AABC standard to achieve designation as an approved American National Standard through ANSI. This comprehensive manual details the minimum standards for total system balance. The Standards will assist the design professional in achieving design intent, provide a better understanding of the scope of work required of the TAB agency, and ensure that proper methods and procedures are followed in the test and balance process.
- [AABC Technician Training Manual, 3rd Ed (Member)](/product/aabc-technician-training-manual-3rd-ed-member/): 3rd edition, 550 pages List price: $95.00 Member price: $50.00 Completely revised and expanded with new content, this in-depth manual designed for training test and balance technicians covers all aspects of total system balance, including diagrams, illustrations and review questions. A companion Instructor’s Guide is also included to facilitate the learning process and help gauge progress
- [AABC Technician Training Manual, 3rd Edition BOOK & PDF (Member)](/product/aabc-technician-training-manual-3rd-edition-book-pdf-member/): 3rd edition, GBC-bound 550 pages AND fully searchable PDF List price: $135.00 Member price: $50.00 NOTE: This is for the bound edition of the AABC Technician Training Manual as well as a digital copy in PDF format. Completely revised and expanded with new content, this in-depth manual designed for training test and balance technicians covers all aspects of total system balance, including diagrams, illustrations and review questions. A companion Instructor’s Guide is also included to facilitate the learning process and help gauge progress.
- [AABC Technician Training Manual, 3rd Ed PDF (Member)](/product/aabc-technician-training-manual-3rd-ed-pdf-member/): 3rd edition, 550 pages List price: $95.00 Member price: $50.00 Click Here to Purchase Softcover Version Completely revised and expanded with new content, this in-depth manual designed for training manual test and balance technicians covers all aspects of total system balance, including diagrams, illustrations and review questions. A companion Instructor’s Guide is also included to facilitate the learning process and help gauge progress
- [AABC Technician Training Manual, 3rd Ed PDF](/product/aabc-technician-training-manual-3rd-ed-pdf/): 3rd edition, 550 pages List price: $95.00 Member price: $50.00 Click Here to Purchase Softcover Version Completely revised and expanded with new content, this in-depth manual designed for training test and balance technicians covers all aspects of total system balance, including diagrams, illustrations and review questions. A companion Instructor’s Guide is also included to facilitate the learning process and help gauge progress
- [TAB Journal](/product/tab-journal/): TAB Journal is AABC‘s quarterly magazine featuring technical articles and commentary about all aspects of testing and balancing. The only magazine devoted exclusively to the test and balance industry, TAB Journal welcomes articles and letters from contributors throughout the construction industry. Read the most recent issue online now. For subscription information or to request a free sample issue, please contact AABC National Headquarters or use the publication form to place your order. Published 4 times/year. One-year subscription: US $24 Canada $28 International $32
- [AABC Technician Training Manual, 3rd Ed](/product/aabc-technician-training-manual/): 3rd edition, 550 pages List price: $95.00 Member price: $50.00 Completely revised and expanded with new content, this in-depth manual designed for training test and balance technicians covers all aspects of total system balance, including diagrams, illustrations and review questions. A companion Instructor’s Guide is also included to facilitate the learning process and help gauge progress
- [Equation Quick Guide](/product/equation-quick-guide/): The Equation Quick Guide covers fan laws, sheave sizing, density, humidification, psychrometric properties of air and water, pump laws, cooling towers, and electrical equations. It also includes, duct calculations, electrical distribution systems, conversion factors, altitude correction factors, suggested terminal unit primary inlet velocities, and a velocity pressure conversion table for standard air. This high-quality guide features a tabbed structure for quick reference, durable construction, and provides reader-friendly content in an easy to carry format.
- [Kahoe Test & Balance Field Manual](/product/kahoe-test-balance-field-manual/): 1st edition, softcover ring bound, 217 pages List price: $95.00 Member price: $75.00 An easy to use manual for the balancing technician that covers design components, air and water flow, temperature controls, and electricity. Concise graphics and illustrations allow for easy understanding
- [AABC Technician Training Manual, 3rd Edition BOOK & PDF](/product/aabc-technician-training-manual-3rd-edition-book-pdf/): 3rd edition, GBC-bound 550 pages AND fully searchable PDF List price: $135.00 Member price: $50.00 NOTE: This is for the bound edition of the AABC Technician Training Manual as well as a digital copy in PDF format. Completely revised and expanded with new content, this in-depth manual designed for training test and balance technicians covers all aspects of total system balance, including diagrams, illustrations and review questions. A companion Instructor’s Guide is also included to facilitate the learning process and help gauge progress.
- [AABC National Standards for Total System Balance, 7th Edition Hardcover](/product/aabc-national-standards-for-total-system-balance-hardcover/): 7th edition, 550 pages Hardcover or PDF NOTE: The 8th Edition is now available here. The 7th Edition of AABC’s National Standards for Total System Balance is the first AABC standard to achieve designation as an approved American National Standard through ANSI. This comprehensive manual details the minimum standards for total system balance. The Standards will assist the design professional in achieving design intent, provide a better understanding of the scope of work required of the TAB agency, and ensure that proper methods and procedures are followed in the test and balance process.
- [AABC National Standards for Total System Balance, 7th Edition BOOK & PDF](/product/aabc-national-standards-for-total-system-balance-book-pdf/): Hardcover, 550 pages AND fully searchable PDF List price: $125.00 NOTE: This is for the hardcover 7th edition of the AABC National Standards as well as a digital copy in PDF format. The 8th Edition is available here. The 7th Edition of AABC’s National Standards for Total System Balance is the first AABC standard to achieve designation as an approved American National Standard through ANSI. This comprehensive manual details the minimum standards for total system balance. The Standards will assist the design professional in achieving design intent, provide a better understanding of the scope of work required of the TAB agency, and ensure that proper methods and procedures are followed in the test and balance process.
- [AABC National Standards for Total System Balance PDF](/product/aabc-national-standards-for-total-system-balance/): 7th edition, hardcover, 550 pages List price: $85.00 Member price: $40.00 Click Here to Purchase Hardcover Version The 7th Edition of AABC’s National Standards for Total System Balance is now available! Completely rewritten and reorganized, the Standard is also the first AABC standard to achieve designation as an approved American National Standard through ANSI. This comprehensive manual details the minimum standards for total system balance. The Standards will assist the design professional in achieving design intent, provide a better understanding of the scope of work required of the TAB agency, and ensure that proper methods and procedures are followed in the test and balance process.
## Events
- [UV-C Light Safety](/events/uv-c-light-safety/): Abstract:
- [Reverse Return Piping Gone Wrong](/events/reverse-return-piping-gone-wrong/): **AABC, ACG, and EMA members can access this webinar at no cost through the Member Portal as part of their membership benefits.
- [Digital Solutions For TAB Firms: The Next Chapter With TABopts](/events/digital-solutions-for-tab-firms-the-next-chapter-with-tabopts/): **AABC, ACG, and EMA members can access this webinar at no cost through the Member Portal as part of their membership benefits. 
- [TAB in the Real World: An Approach to HVAC Systems That Don’t Follow the Rules](/events/tab-in-the-real-world-an-approach-to-hvac-systems-that-dont-follow-the-rules/): **AABC, ACG, and EMA members can access this webinar at no cost through the Member Portal as part of their membership benefits. 
- [Difficult Designs: Systems That Make TAB a Challenge](/events/difficult-designs-systems-that-make-tab-a-challenge/): **AABC, ACG, and EMA members can access this webinar at no cost through the Member Portal as part of their membership benefits. 
- [Using TAB Experience to Troubleshoot Performance Issues](/events/using-tab-experience-to-troubleshoot-performance-issues/): **AABC, ACG, and EMA members can access this webinar at no cost through the Member Portal as part of their membership benefits. 
- [In Search of the Healthy Classroom](/events/in-search-of-the-healthy-classroom/): **AABC, ACG, and EMA  members can access this webinar at no cost through the Member Portal as part of their membership benefits. 
- [Diagnosing System Effect Common Causes And Where to Start](/events/diagnosing-system-effect-common-causes-where-to-start/): **AABC, ACG, and EMA  members can access this webinar at no cost through the Member Portal as part of their membership benefits. 
- [Source Air Temperature Troubles](/events/source-air-temperature-troubles/): **AABC, ACG, and EMA members can access this webinar at no cost through the Member Portal as part of their membership benefits. 
- [The TAB Industry: Where It’s Been and Where It’s Going (A Conversation with 2025 AABC Hall of Fame Modern Inductees)](/events/the-tab-industry-where-its-been-and-where-its-going-a-conversation-with-2025-aabc-hall-of-fame-modern-inductees/): **AABC, ACG, and EMA members can access this webinar at no cost through the Member Portal as part of their membership benefits. 
- [Mastering Stairwell Pressurization: A TAB-Centered Approach](/events/mastering-stairwell-pressurization-a-tab-centered-approach/): Stairwell pressurization systems are a critical life safety feature designed to maintain smoke-free egress paths during fire emergencies. This session explores the testing and balancing (TAB) process for these systems in accordance with NFPA 92 and NFPA 101. Attendees will examine procedures for evaluating fan performance, verifying relief damper operation, and conducting differential pressure testing across multiple floors, including smoke evacuation under alarm conditions.
- [Specifying Duct Leakage – Percent Leakage vs Leakage Class](/events/specifying-duct-leakage-percent-leakage-vs-leakage-class/): Energy efficiency is a main concern for HVAC systems relating to Duct system leakage. The concerning question is how the engineer specifies duct leakage in specifications.
- [Periodic TAB of Existing Buildings](/events/periodic-tab-of-existing-buildings/): Discover how regular TAB practices can maintain system efficiency, enhance indoor environmental quality, and reduce operational costs in existing buildings.
- [Selecting The Proper TAB Equipment To Test Controlled Environments and Laminar Flow Devices](/events/proper-tab-equipment/): As Controlled Environments become a larger part of the TAB market, selecting the proper test equipment & deploying the correct testing method is critical. Some published standards, manufacturer’s specifications,  and owner SOP’s run counter to the traditional testing methods. Knowing which test instrument & method to use can make or break a project. This webinar will help TAB professionals realize that not everything is “By the Book”.
- [Building Decarbonization – Key Test and Balance Issues and Solutions for Occupancy, Wellness, and Sustainability](/events/building-decarbonization/): Building decarbonization is considered the cornerstone of global climate action, but success hinges on efficient systems design and precise performance verification through test and balance (TAB). This session explores the critical role of TAB in optimizing HVAC system performance in conjunction with commissioning to support energy efficiency, occupant wellness, and indoor environmental quality. Common TAB challenges in decarbonized and high-performance building challenges including system calibration, airflow imbalances, and sensor integration, and how these issues can compromise sustainability and comfort goals, will be addressed. Real-world examples will be used to demonstrate how advanced TAB methodologies, continuous commissioning, and data-driven diagnostics can enhance system functionality, reduce emissions, and align with the goals of LEED, WELL, and other green building certifications. The session will equip participants with actionable strategies to ensure that decarbonization efforts translate into measurable performance outcomes.
- [Pre-Demolition Readings](/events/pre-demolition-readings/): Abstract
- [Troubleshooting Flow Issues of a Renovated Condensing Water System](/events/troubleshooting-flow-issues-of-a-renovated-condensing-water-system/): Abstract:
- [test](/events/test/): Abstract:
- [Copy of Pre-TAB for Engineered Designs](/events/copy-of-pre-tab-for-engineered-designs/): Abstract:
- [Pre-TAB for Engineered Designs](/events/pre-tab-for-engineered-designs/): Abstract:
- [Fundamentals of Test, Adjust, & Balance for Engineers, Cx & Energy Providers](/events/tab-fundamentals-web/): Abstract:
- [Commissioning for 1015 18th ST NW](/events/commissioning-for-1015-18th-st-nw/): Abstract:
- [Copy of The Mass Airflow Triangle:  What Is the Difference Between ACFM, SCFM, and MCFM? Errors That We All Make.](/events/copy-of-the-mass-airflow-triangle-what-is-the-difference-between-acfm-scfm-and-mcfm-errors-that-we-all-make/): Abstract:
- [Fundamentals of Fume Hood Testing](/events/fundamentals-of-fume-hood-testing/): Abstract:
- [Airflow Measurement & Control with Induction Diffuser Technology](/events/airflow-measurement-control-with-induction-diffuser-technology/): Abstract:
- [ASHRAE Standard 62.1 and Recent Changes That Impact the TAB Community](/events/ashrae-standard-62-1-and-recent-changes-that-impact-the-tab-community/): Abstract:
- [Distributed Pumping in Chilled Water Systems](/events/distributed-pumping-in-chilled-water-systems/): Learning Objectives:
- [Healthcare Facility Compliance: Best Practices for an Independent, AABC Total System Balance Approach](/events/healthcare-facility-compliance-best-practices-for-an-independent-aabc-total-system-balance-approach/): Abstract:
- [Fire Smoke Damper Testing and Fire Life Safety System Maintenance at Your Facility](/events/fire-smoke-damper-testing-and-fire-life-safety-system-maintenance-at-your-facility/): An important component to maintaining fire life safety (FLS) systems are fire smoke dampers (FSDs), Smoke Dampers, (SDs), and fire dampers (FDs) which are located at duct penetrations through fire rated assemblies such as walls, ceilings, and floors.
- [Planning & Scheduling TAB Work for the Best Value Outcome 2](/events/planning-scheduling-tab-work-for-the-best-value-outcome-2/): Abstract:
- [Hydronic Balancing – Design flow at Terminal Units](/events/hydronic-balancing-design-flow-at-terminal-units/): Abstract:
- [Effects of Temperature Change on Building Static Pressure Measurement](/events/effects-of-temperature-change-on-building-static-pressure-measurement/): Robin Rader, P.E., CxA, Design Alaska
- [Creating a Healthy Workplace in a COVID World: A Better Path Forward](/events/creating-a-healthy-workplace-in-a-covid-world-a-better-path-forward/): Jeremy McDonald, P.E., Principal, Guth DeConzo, Consulting Engineers, PC
- [Hospital Air Balancing Planning & Coordination Case Studies](/events/hospital-air-balancing-planning-coordination-case-studies/): The required sophistication of air systems in a healthcare setting and the process of working in existing hospitals present many obstacles to the TAB process. The case studies presented highlight how to anticipate such obstacles as well as clearly outline the constraints the team must work with to achieve success.
- [Digital Transformation in The Building Industry (ASHRAE Presidential Address)](/events/digital-transformation-in-the-building-industry-ashrae-presidential-address/): Charles Gulledge, III, ASHRAE President 2020-2021
- [Electrical Distribution Systems: What a TAB Professional Should Know](/events/electrical-distribution-systems-what-a-tab-professional-should-know/): About
- [TAB Best Practices from the ACG Building Systems Commissioning Guideline](/events/tab-best-practices-from-the-acg-building-systems-commissioning-guideline/): Testing, Adjusting, and Balancing (TAB) is a cornerstone of the building systems commissioning process, ensuring HVAC systems achieve design intent and operate at peak efficiency. This session draws from the ACG Building Systems Commissioning Guideline to highlight best practices for integrating TAB agencies into commissioning workflows during both design and construction phases. Attendees will learn how commissioning providers (CxPs) and TAB professionals can collaborate to optimize system performance, streamline communication with design and construction teams, and enhance documentation and verification practices. By understanding the essential role of TAB in system balanceability, diagnostics, and controls integration, participants will gain actionable strategies to improve project outcomes, owner satisfaction, and long-term system performance.
- [Document Control – Exploring Workflow and Software Solutions](/events/document-control/): Implementing document control workflows and software solutions can greatly enhance information transfer from project startup to final reporting. This presentation will showcase methods to ensure teams have the most current project documentation, provide an in-depth look at using Bluebeam for consistent takeoffs and robust as-builts, and present Autodesk Construction Cloud workflows that empower teams both on and off the jobsite.
- [Fundamentals of Heat Transfer and Humidity Control](/events/fundamentals-of-heat-transfer-and-humidity-control/): Join us for an engaging webinar, "Fundamentals of Heat Transfer and Humidity Control," where we explore the core principles that govern thermal energy movement and air moisture regulation. This presentation is designed for professionals seeking a deeper understanding of the science behind these essential concepts and their practical applications in HVAC systems and beyond.
- [Digital Solutions for TAB Firms Utilizing Our TABopts Platform](/events/digital-solutions-for-tab-firms/): Abstract:
- [Digital Strategies for Enhanced TAB & Commissioning](/events/digital-strategies-for-enhanced-tab-commissioning/): The presentation provides an overview of enabling digital technologies being used to expedite project delivery and automate aspects of the testing & commissioning process. It provides examples of digital strategies to minimize field coordination issues and improve project outcomes.
- [2024 AABC Annual Meeting](/events/2024-aabc-annual-meeting/): Market your products and services to nearly 150 test & balance and commissioning professionals!
- [Tackling the Challenges of Repeatable Ultra-Low Flow Measurements](/events/tackling-the-challenges-of-repeatable-ultra-low-flow-measurements/): Abstract:
- [Leakage and Deflection Testing of Air Handling Units](/events/testing-air-handling-units-webinar/): Abstract:
- [Different Types of Hydronic Balancing and their Impact on Controllability](/events/hydronic-balancing-webinar/): Abstract:
- [Preventive Medicine—Commissioning for a Healthy & Safe Building](/events/preventive-medicine-commissioning-for-a-healthy-safe-building/): Abstract:
- [Pathway to Independent Certification and Why It’s So Important!](/events/role-of-tab-contractors-364/): A discussion on the typical journey to certification in TAB, what all is involved, and why it’s so important to be a truly independent 3rd party certified professional when it comes to projects.  Learn about the prerequisite skills and experience required to sit for certification and why it takes so long to gain these skills.  What does a typical path to certification look like?  What is the difference between an individual certification and a firm certification? Join us for a discussion, hear from some recent new members of AABC, and learn why they chose our premier certification.
- [The Role of TAB Contractors in the Commissioning Process](/events/role-of-tab-contractors/): Outlining the role of Testing, Adjusting, and Balancing (TAB) contractors in the commissioning process of HVAC systems. We will navigate through key phases of the commissioning process, exploring how TAB contractors contribute to the efficiency, functionality, and performance of HVAC systems.
- [Smoke Control System Balance for Correctional Facilities](/events/smoke-control-system-balance-for-correctional-facilities/): This case study examines the Test and Balance of a complex smoke control system in a correctional facility. This building utilizes single duct systems with automatic changeover dampers served by multiple fans during both normal and smoke control modes. Since the system must support 24/7 operation without the ability to evacuate occupants, prioritization must be given to the smoke control mode without compromising indoor environmental quality during normal operation.
- [Copy of Fundamentals of Test, Adjust, & Balance for Engineers, Cx & Energy Providers](/events/copy-of-fundamentals-of-test-adjust-balance-for-engineers-cx-energy-providers/): Abstract: