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I placed a thin rubber flap on the back of the vents and when the furnace comes on it opens and draws from the vents and when it shuts off the rubber flap closes and keeps the cold from coming in. And keeps the heat from coming in when its hot outside in the summer and the basement doors are open.
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2017, 3500 Ram Big Horn, 4x4, Crew Cab, DRW, Aisin Transmission, 4:10. Curt Q20, 2014 Mountaineer 331 RLT, Sailun's on the rv and truck.
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