GB/T 43080.4-2025 in English

This standard specifies the efficiency classification for ventilators, particularly focusing on the performance of ventilators when operated at the highest speed of their drive units. It provides detailed criteria and methods for assessing the efficiency levels of ventilators under specified conditions. The document outlines the requirements for testing and evaluating the efficiency of ventilators, ensuring consistency and comparability across different models and manufacturers. It also includes guidelines for the classification of efficiency grades, which are essential for the proper application and selection of ventilators in various operational scenarios. The standard is structured to support both the design and performance validation processes of ventilators.