Got my Aerotherm heater a couple weeks ago and just in time. The weather here in upstate New York went into the lower twenties. I set up the heater on my Skylane and left it turned on overnight. I went back the next day expecting that the motor would be running continuously, but to my pleasant surprise it was not. I reached inside the cowl and could just feel the warmth and of course she started right off with no trouble. I am very pleased.