Decision of the National Institute for Standardization no. 375 dated 07.10.2014

This document establishes technical requirements and test methods for the measurement of sound power level radiated by air conditioning and refrigeration equipment. It specifies the procedures for conducting acoustic measurements in controlled environments to ensure accuracy and reproducibility of results. The standard outlines various testing conditions, including different operating modes and environmental factors that may influence noise emissions. It is designed to support manufacturers, testing laboratories, and regulatory bodies in evaluating the acoustic performance of ventilation and cooling systems. By providing a uniform framework for data collection and analysis, it facilitates consistent assessment across different product types and applications. The guidelines also address the determination of uncertainty in measurements and the reporting of results in a standardized format. This approach helps in comparing products and supports compliance with relevant regulations regarding noise emission limits in various settings. The methodology covers both small and large units, ensuring broad applicability across the industry.