No heat or cooling ducts are blocked when slides are in, the return air ducts are above the slides, but not blocked. I would/ have left them out & on one occasion the park operator ask that I put them in while gone cause they were going to mow & would be out of their way, I wondered what if I had been there.
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Danny & Linda
Fulltimers since 2008
2013 Denali 3500 drw 4x4 d/a
2013 RW 36 FB black & tan
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