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WaltBennett · 06-20-2016, 05:40 AM

There are several posts about AC performance. With little to no shade, it pretty much comes down to the color of your rig, awning out & slide covers, window insulation (bubble foil kind), opening & closing the door, and how many lights & etc. turned on inside. We've one 15k btu AC and can get an 18 to 20 degree drop from outside temp in our mostly white Montana. This in up to 114 degree and very dry heat last year. Not enjoyable 'camping', but table fans made it barely bearable and once the sun went down, it got a lot better. If you've a dark color rig, you'd almost have to have a second AC to get even close.

No matter what manufacturers claim, there simply isn't much insulation that can go into an under 3" thick wall or roof, and they put none in the floor. Double pane windows don't help much either. These things are just not made for very hot or very cold weather and the only way to survive either is by workarounds.

Forgot about lighting - if you've ANY incandescent bulbs, replace them right away with LEDs. Way too much heat from the old kind!

06-20-2016, 05:40 AM	#4
WaltBennett Senior Member Join Date: Apr 2013 Location: Haymarket, VA Posts: 382	There are several posts about AC performance. With little to no shade, it pretty much comes down to the color of your rig, awning out & slide covers, window insulation (bubble foil kind), opening & closing the door, and how many lights & etc. turned on inside. We've one 15k btu AC and can get an 18 to 20 degree drop from outside temp in our mostly white Montana. This in up to 114 degree and very dry heat last year. Not enjoyable 'camping', but table fans made it barely bearable and once the sun went down, it got a lot better. If you've a dark color rig, you'd almost have to have a second AC to get even close. No matter what manufacturers claim, there simply isn't much insulation that can go into an under 3" thick wall or roof, and they put none in the floor. Double pane windows don't help much either. These things are just not made for very hot or very cold weather and the only way to survive either is by workarounds. Forgot about lighting - if you've ANY incandescent bulbs, replace them right away with LEDs. Way too much heat from the old kind! __________________ '06 F350 Lariat turbo diesel dually, Curt 20k, Softopper, Aerosheld, coolant filter, air bags '10 3665RE Hickory, wet bolts, Trimetric battery monitor, 4 100w panels & Morningstar TS-45, still tweeking!