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**DQDick** · 08-03-2018, 09:06 PM

To get better air flow on my whisper quiets I inserted 2 9" pieces of 1 1/2" PVC pipe in each return air vent to open the duct (if yours has the new plastic ductwork you probably don't need to do this, if it's cardboard you do) Then I took each supply duct out, cleaned up the tape and cut the part of the vent that protrudes into the duct down so it didn't block the duct anymore and then I cut every other fin off the vent to open it up even more.

08-03-2018, 09:06 PM	#53
DQDick Site Team Join Date: Jun 2011 Location: Wilsey Posts: 18,799 M.O.C. #11455	To get better air flow on my whisper quiets I inserted 2 9" pieces of 1 1/2" PVC pipe in each return air vent to open the duct (if yours has the new plastic ductwork you probably don't need to do this, if it's cardboard you do) Then I took each supply duct out, cleaned up the tape and cut the part of the vent that protrudes into the duct down so it didn't block the duct anymore and then I cut every other fin off the vent to open it up even more. __________________ Dick, Joyce, Diego, Picatso and Gustav 2017 3720 RL, and 2013 HC 343RL Pullrite Hitch, IS, Disk Brakes, 3rd AC, Winegard Traveler, Bathroom door mod, Dometic 320, couch for desk swap, replaced chairs, sun screens, added awnings, etc.