New ventilation units, which include exhaust fans and supply fans, generate a significant amount of noise during operation. When the noise exceeds a certain decibel level, it can disturb nearby residents. What should be considered when implementing noise control for ventilation unit equipment?

Its vibration and noise reduction scope includes an underground ground-source heat pump room, a roof-mounted air-source heat pump unit, and an underground air handling unit. The noise generated by the equipment during operation is transmitted through the on-site structure to the spaces above and below, affecting the indoor sound environment of the residents. It is essential to install a vibration reduction system between the equipment, pipelines, and the building to lower the transmission of equipment noise and protect the indoor sound environment of the residents.

(1) Equipment Main Vibration Reduction: The operation of the equipment generates significant vibration. This type of structural noise is mainly transmitted to the floor and then to the upper space through the shell and foundation of the equipment. Low-frequency solid noise pollution is a major issue and technical challenge in the treatment process. Therefore, installing composite vibration dampers can achieve the treatment goal.

(2) Pipe Hanger Retrofit: The connection of pipes and bridge structures to noise sources such as chillers, pumps, and air compressors is a primary route for noise transmission. The hangers for water pipes need to be vibration-dampened to reduce noise transmission along this main route.

(3) Foundation Bracket Retrofit: The pipeline foundation bracket is a primary transmission path, requiring vibration reduction measures. Composite vibration isolation measures are added to the bottom of the ground-mounted support to decrease the efficiency of vibration transmission.