Trane TRG-TRC013-EN manual Acoustical Guidelines, Minimize system effects

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Acoustical Guidelines

▲Optimize fan and air-handler selection for lowest overall sound

▲Select fan to operate safely away from surge region

▲Minimize system effects

▲Use low-pressure-drop duct fittings (follow SMACNA recommendations)

▲Avoid rectangular sound traps, if possible

▲Use adequate vibration isolation

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by the Sheet Metal and Air Conditioning Contractors’ National Association (SMACNA) for designing and installing duct systems

■Avoid rectangular sound traps, if possible

■On larger fans, isolate the fan from the air handler to minimize vibration

Lowering the sound level of the source reduces the sound transmitted through all paths. In order to treat the paths, first analyze them all and determine which are critical. Then compare different methods of attenuating the critical path. An optimum solution involves addressing the source and the paths during system design. Software tools exist to model HVAC system noise in acoustically- sensitive projects.

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