Hi, szimmerer. I also have the 11,000 BTU air conditioner with heat strip and I'm happy with how it works in my 25' trailer. Also because I have a Yamaha 2400 portable generator, I wouldn't want to upgrade to a larger A/C even though they say it will still power it. My question for you is: My 11,000 BTU A/C has it's controls on the roof unit, does your's? And if yours did, how did you set-up the A/C, Furnace, Thermostat system? And at what extra cost?