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Old 04-04-2017, 06:36 PM   #1
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Roof AC units on/ roof fans/vents open or closed?

We're in SW Fla and it's really heating up here. We plan on leaving this upcoming Friday to head back to NJ. With both units running as well as the dash air should the roof fans/vents be open or closed while travelling with the AC's cranking? Heat rises so maybe open with the fan running? Closed up tight to keep the cool air inside? Which is it?
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Old 04-04-2017, 06:39 PM   #2
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If the vents are open to let the hot air out, then hot outside air has to be coming IN from somewhere - and your AC will never have a chance to catch up.

I'd say have the vents open for a short time to let the worst of the heat out (this is assuming that the RV has been sitting with the AC off and got hot inside). Then close the vents and let the AC do it's thing.
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Old 04-04-2017, 06:42 PM   #3
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Agree with Podivin.
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Old 04-04-2017, 06:55 PM   #4
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Makes sense. Thank you.
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