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I just cut black poster board to fit and screwed the covers back on. Add it in the spring when I put the register vents that cloose in for the summer and take them back out when I put the open register vents back in in the fall. just the thought of blocking the return air and running the furnace gets the furnace manufacturer reps all excited at the Rally.
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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.
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