# Energy Conservation Program: Energy Conservation Standards for Direct Expansion-Dedicated Outdoor Air Systems
> **US Department of Energy** · Final rule. · Published 2022-11-01 · Effective 2023-01-03 · 87 FR 65651
## Document
- **Document number:** 2022-23185
- **Category:** energy-efficiency
- **Sub-agency:** US Department of Energy
- **Federal Register citation:** 87 FR 65651
- **CFR reference:** 10 CFR 429
- **Publication date:** 2022-11-01
- **Effective date:** 2023-01-03
- **Energy docket:** EERE-2017-BT-STD-0017
## Abstract

In this final rule, DOE is establishing energy conservation standards for direct expansion-dedicated outdoor air systems ("DX- DOASes") that are of equivalent stringency as the minimum levels specified in the most recent publication of the American Society of Heating, Refrigerating and Air-Conditioning Engineers ("ASHRAE") Standard 90.1 "Energy Standard for Buildings Except Low-Rise Residential Buildings" ("ASHRAE 90.1-2019") when tested pursuant to the DOE test procedure for DX-DOASes--which incorporates by reference the most recent applicable industry standard for this equipment. DOE has determined that it lacks clear and convincing evidence to adopt standards more stringent than the levels specified in ASHRAE 90.1-2019.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2022/11/01/2022-23185/energy-conservation-program-energy-conservation-standards-for-direct-expansion-dedicated-outdoor-air)
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