Discussion on testing approach for noise of air conditioning products based on standard GB 9068-88

This paper analyses the Chinese standard GB 9068-88 “Determination of sound power levels for noise emitted by heating, ventilation and air conditioning equipments—Engineering method” and examines current industry practices in noise testing. The study identifies limitations in existing standards regarding five key aspects: noise assessment parameters, background noise correction values, background noise limits, equipment installation methods, and reflectors. Improvement suggestions are then proposed to address these limitations.