This is awesome info. I have (2) rooftop A/C's in my Windsport 34J (35.7') and I had both on prepping to leave for a weekend trip. Both on for 4 hrs and the coach was in direct sunlight in 98-100F California heat. IT still was above 80 when we left in the coach. I have no Bubbles just shades drawn. RV Facing East. Going to use my front A/C as my test case. I could win (2) ways. More Comfortable RV and a happier Wife!! BONUS!