# Energy Conservation Program: Test Procedure for Walk-In Coolers and Walk-In Freezers
> **US Department of Energy** · Final rule. · Published 2021-03-26 · Effective 2021-04-26 · 86 FR 16027
## Document
- **Document number:** 2021-05414
- **Category:** other
- **Sub-agency:** US Department of Energy
- **Federal Register citation:** 86 FR 16027
- **CFR reference:** 10 CFR 431
- **Publication date:** 2021-03-26
- **Effective date:** 2021-04-26
- **Energy docket:** EERE-2020-BT-TP-0016
## Abstract

This final rule amends the current test procedure for hot gas defrost unit coolers by making it consistent with a recent update to the industry testing standard that is incorporated by reference in the relevant Federal test procedure for walk-in freezer refrigeration systems. This final rule updates the equations used to calculate defrost energy and heat contributions applicable to these systems to provide a consistent performance evaluation between hot gas defrost and electric defrost unit coolers when tested alone.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2021/03/26/2021-05414/energy-conservation-program-test-procedure-for-walk-in-coolers-and-walk-in-freezers)
---
*AI Analytics · CC0 1.0*