I guess the honest and reliable part caused the lack of response. Any way I ran across a guy today. He came out with no ladder. Returned 30 minutes later with a ladder, still too short, we combined 2 ladders and were on the roof. The AC unit only needed freon. $1,400 peso's later its working great. I asked about another unit for another bedroom. He said 12,000 BTU installed, complete, 17,000 to 18,000.