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AHRI 1250 (I-P/2025)

Performance Rating of Walk-in Coolers and Freezers
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The purpose of AHRI Standard 1250 (I-P), and its metric equivalent AHRI Standard 1251 (SI), is to establish a uniform method for rating the performance of Walk-in Coolers and Freezers (WICF).

Specifically, the standard:

  • Establishes Definitions: Provides clear, standardized definitions for terms related to walk-in cooler and freezer equipment.
  • Sets Test and Rating Requirements: Outlines the specific procedures and conditions for testing and rating the performance of the mechanical refrigeration equipment used in WICFs. This is critical for determining a unit's efficiency and capacity.
  • Determines Minimum Data: Specifies the minimum data that manufacturers must include in their published ratings.
  • Ensures Conformance: Lays out the conditions that must be met to conform to the standard, which helps ensure that performance claims by different manufacturers are comparable and reliable.

The standard applies to the mechanical refrigeration equipment for WICFs, which can be an integrated single package unit or separate unit cooler and condensing unit sections (often called "split systems").

In short, AHRI 1250/1251 provides the rules to ensure that when manufacturers advertise the performance (like cooling capacity and energy efficiency) of a walk-in cooler or freezer system, they are all measuring and reporting those numbers in the exact same way. This helps engineers, contractors, and users make informed, apples-to-apples comparisons.

SDO AHRI: Air-Conditioning, Heating, and Refrigeration Institute
Document Number 1250 (I-P)
Publication Date Sept. 15, 2025
Language en - English
Page Count
Revision Level
Supercedes
Committee
Publish Date Document Id Type View
Sept. 15, 2025 AHRI 1250 (I-P/2025) Revision
Jan. 1, 2020 Revision