The "Muffler" Acoustic Fan Plenum Riser by Tamarack Technologies

The MFLR20 is an innovatively designed acoustic plenum "Muffler" engineered and equipped with acoustic absorbing material to efficiently reduce sound levels in your home. Install the Tamarack Technologies MFLR20 Acoustic Plenum "Muffler" with your Tamarack Whole House Fan and enjoy the comfort of a well ventilated home with the added benefit of reduced sound levels.The Muffler is specially designed to raise the HV1000 and HV1600 off the attic floor joist by 12". Additionally, if your attic floor joists are not exactly 16" odc or 24" odc, install this below the HV units described above for a perfect fit so, no joist cutting is necessary.