Rooftop Unit Sound Control
Current construction trends towards curb mounting of packaged air conditioners with integrated DX cooling require more attention to vibration and noise control particularly in the downflow configuration preferred by many designers to eliminate ductwork outside the building envelope. In addition to attenuation of fan noise and structure-borne vibration, it is now necessary address radiated noise under the unit inside the curb, breakout noise in the critical first elbows inside the building, as well as flanking noise leaks where the downflow ducts penetrate the roof deck. Integrated single source specifications are needed to effectively address this multi-path application.