ISO 18501:2025

Performance rating of positive displacement refrigerant compressor

Publication date:   Mar 20, 2025

General information

60.60   Standard published   Mar 20, 2025

ISO

ISO/TC 86/SC 4 Testing and rating of refrigerant compressors

International Standard

27.200   Refrigerating technology

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Scope

This document specifies normative references, terms and definitions, rating requirements, published rating, tolerance and marking provisions of positive displacement refrigerant compressors. This document applies to positive displacement refrigerant compressors and their performance in air-conditioning, heating, refrigeration and dehumidification applications. Single stage, two-stage and refrigerant-injected compressors without intermediate temperature load (only one evaporator) are included in this document. Subcritical operation and transcritical operation are also included in this document.
Compressors for other applications, compression types and operations can also refer to this document. The manufacturer is solely responsible for the determination of values to be used in the published product information.
This document is intended as guidance for the industry, including manufacturers, engineers, installers and service contractors. It defines the minimum amount of information in a standard form to enable the evaluation and comparison of different compressors for use in an application.

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PUBLISHED
ISO 18501:2025
60.60 Standard published
Mar 20, 2025