Air terminal unit Radiated Sound Power baseline data is reported per the AHRI-880-2011 standard. The HUSHCORE Premium System removable acoustical wraps are designed to attenuate the radiated transmission path. Acoustical product testing which most accurately predicts how directly lagged HUSH FLEX panels will perform in this application is outlined in standard ASTM E-1222, “Standard Test Method for Laboratory Measurement of the Insertion Loss of Lagging Systems”. Typical reductions of radiated sound are 4 to 6 dBA.
Two styles of panels can be utilized depending on the return air path utilized on the project. If the units have ducted returns, the HUSH FLEX™ product PWN-250 can be used. If the units have open plenum returns, a higher flammability/fire rating is recommended. HUSH FLEX™ product PWA-500 has a Class “A”/1 rating per ASTM E-84 flammability test procedures.