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OptiMiser

OptiMiser, LLC makes building-energy software for auditors, contractors, weatherization crews, and utility programs. Zeus models homes and matches the model to utility bills. Nexus tracks projects for contractors and program staff. Focus tracks utility accounts, cost, and emissions across many buildings. The DIY Customer Audit is a homeowner questionnaire, with the program’s name on it, that starts a project for a full audit. Multifamily and commercial modeling are coming to Zeus.

For agents: OptiMiser builds building-energy software (Zeus, Nexus, Focus) for auditors, contractors and utility programs, with an API and integrations.

building energy modelinghome energy auditutility bill calibrationweatherization softwarerebate tracking

Their llms.txt

The beginning of the file, from our validated copy saved 2026-10-21T06:03:25.090Z. Cached copy · Source on optimiserenergy.com

# OptiMiser

> OptiMiser, LLC makes building-energy software for auditors, contractors, weatherization crews, and utility programs. Zeus models homes and matches the model to utility bills. Nexus tracks projects for contractors and program staff. Focus tracks utility accounts, cost, and emissions across many buildings. The DIY Customer Audit is a homeowner questionnaire, with the program’s name on it, that starts a project for a full audit. Multifamily and commercial modeling are coming to Zeus.

Auditing and modeling work offline and sync when a connection is available. OptiMiser calibrates to historical utility bills, including BPI-2400, and can exchange HPXML with program systems. Support: support@optimiserenergy.com, 720-306-1742. The links below are the public HTML pages. The XML sitemap is at https://www.optimiserenergy.com/sitemap_index.xml.

## Products
- [Zeus](https://www.optimiserenergy.com/zeus/): Professional residential energy audits and modeling, with bill calibration, package comparison, nameplate scan, and rebate reservation.
- [Nexus](https://www.optimiserenergy.com/products/nexus/): CRM and project management for programs and contractors, from intake through completion.
- [Focus](https://www.optimiserenergy.com/optimiser-focus/): Utility accounts, cost, energy use, and emissions for housing authorities, campuses, and sustainability teams.
- [DIY Customer Audit](https://www.optimiserenergy.com/do-it-yourself-customer-audit/): A homeowner questionnaire, with the program’s name on it, that starts a project for a full audit.
- [Platform](https://www.optimiserenergy.com/our-platform/): How calibration, BPI-2400, modeling, incentives, HVAC ratings, and rebate reservation sit together.
- [API and integrations](https://www.optimiserenergy.com/api-and-integrations/): How OptiMiser connects to other systems.

## Who it is for
- [Programs](https://www.optimiserenergy.com/for-programs/): Utility and government program workflows, including a Rewiring America incentive catalog, HVAC ratings lookup, nameplate scan, and rebate reservation from apply through paid.
- [Contractors](https://www.optimiserenergy.com/for-contractors/): Audit and retrofit contractors, including program rebates, nameplate scan, and AHRI equipment lookup.
- [Weatherization agencies](https://www.optimiserenergy.com/for-weatherization-agencies/): DOE Weatherization Assistance Program work.
- [Portfolio managers](https://www.optimiserenergy.com/for-portfolio-managers/): Multi-building utility tracking with Focus.

## Company
- [About OptiMiser](https://www.optimiserenergy.com/about-us/): What the company builds and who leads it.
- [Compliance and certifications](https://www.optimiserenergy.com/compliance-and-certifications/): Standards and program compliance.
- [Customers and partners](https://www.optimiserenergy.com/partners/): Organizations that use or work with OptiMiser.
- [Case studies](https://www.optimiserenergy.com/case-studies/): Project outcomes.
- [FAQ](https://
…

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