Well you have to have the AC on, Your interior will eventally heat up inside but it takes a lot longer with the ceramic tint. With the mods I have done with my AC and window tint / Roof vent insulation so far I have had no problem maintaining low 70s in my RV all day lone in direct sun the entire time. But its only been 90 - 95 deg for the most part where I am located at. August brings the crazy hot weather so I can update next month.
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