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ANSI/ASHRAE Standard 41.9-2025

Standard 41.9-2025 -- Standard Methods for Refrigerant Mass Flow Measurements Using Calorimeters

Standard Details

Full Description

ANSI/ASHRAE Standard 41.9 prescribes methods for measuring mass flow rates for refrigerants and refrigerant/lubricant mixtures using calorimeters. The 2025 revision of Standard 41.9 makes it easier for higher-tier ASHRAE standards to adopt this standard by reference, updates the uncertainty requirements, and updates the steady-state criteria sections.

General Information

Status : ACTIVE
Standard Type: Main
Document No: ANSI/ASHRAE Standard 41.9-2025
Document Year: 2025
Pages: 38

Life Cycle

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ANSI/ASHRAE Standard 41.9-2025
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