Compilation essentials interpretation of GB/T 40379-2021 Multifunctional air-handling unit for residential and similar application

This paper presents the compilation background of the product national standard GB/T 40379-2021 Multifunctional air-handling unit for residential and similar application, describes the product types and performance requirements covered by the standard, and emphatically interprets the compilation essentials such as reference outdoor air flow rate, adjustment of composite function test state of recirculation air units, thermal performance test of units with integrated operation, etc.