I plugged those blasted roof vents with the thick foam with the reflectix to prevent heat gain through them. The difference is noticeable. I never camp without some shade available in Florida and my one 13.5k unit does fine with my 32' TT that is poorly insulated.
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2006 Keystone Hornet 29RLS (The Cracker Cabana)
2009 F-250 SuperDuty CC 6.8L/4.10 (The Black Pearl)
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