The “Muffler” Acoustic Fan Plenum Riser


Sound Insulating Riser for Fan Models HV1000, HV1450 and HV1600

SKU: TTi-MFL20 Category:


The Muffler is specially designed to raise the HV1000, HV1450 and HV1600 off the attic floor joist by 12″.

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┬áso, no joist cutting is necessary.

Equipped with acoustic absorbing material to reduce the sound levels of the fan.

Made of 20 gauge galvanized steel.

Easy assembly and Made in the U.S.A.

Click here for product specifications.

Shipping within the Continental US, all others call for quote.





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