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Old 04-06-2011, 08:02 AM   #1
Bus Crazy
Join Date: Feb 2009
Location: Austin, TX
Posts: 1,489
Year: 1996
Coachwork: Thomas
Chassis: International
Engine: DT466/AT545
Re: RV air conditioner install issues on bus?

One issue you may have is that the metal is thin and the wieght of the AC will bend it. I think many people (including myself) put some sort of bracing between the layers of the ceiling and roof to take up the space and prevent the sagging of the upper roof metal. Although a little bit of sagging may actually help level out any curvature. I cut some 2" pieces of wood and used that to fill the gap and attach the upper unit to the roof.
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Old 04-06-2011, 10:40 AM   #2
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Location: Estevan, Saskatchewan, Canada
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Year: 1990
Coachwork: Goshen
Chassis: Ford
Engine: 7.3
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Re: RV air conditioner install issues on bus?

id suggest browsing builds on here where they have installed AC's. if i remember right it isnt a big deal.
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Old 04-06-2011, 09:51 PM   #3
Bus Nut
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Posts: 446
Year: 89
Coachwork: thomas
Engine: 7.3 diesel
Re: RV air conditioner install issues on bus?

I used 2" styrofoam from an insulated panel used for sunroom walls to between the inner and outer layer. fit tight and insulated a little. It has an aluminum skin on it to make it rigid
see my conversion at
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