heating ventilating and air conditioning hvac air distribution air duct accessories duct silencersDuct Silencers - 23 33 19
Sound attenuators, or duct silencers, are acoustic chambers consisting of a rectangular or cylindrical device with a complex system of baffles mounted inside. They are designed to prevent and reduce the transmission of sound through ducts and are usually installed into a duct run near the central supply unit in both return and supply ducts. Sound attenuators may also be found in return and/or supply ducts of areas with special sound requirements such as auditoriums and lecture halls, as well as in the plenums of built-in air handlers. ...
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Tips on Estimating Duct Silencer Costs from RSMeans
 | Review all construction documentation before proceeding with the estimate for HVAC. It is not unusual to find items on the plans, but not in the specifications; or they may be in the specifications but not on the drawings. Also check any and all communications; the owner may have requested a change or expressed a concern or a specific need, and not have had it included in your drawings or specifications. |
