I decided to see how hot , and how much fuel I would use if I set my stove on # 3 manual and let her rip. Outside temps were a high of 30 F to a low of 10 F. I used 3 thermostats to record the temps , two in the same room as the stove , and one in a adjoining room. In twenty four hours I got the stats in the stove room up to 95 F and 92 F , and the one in the adjoining room up to 83F . I had intended to let the stove remain on # 3 until it ran out of fuel but the heat was making me real sick and I had a terrible head ache . So after 24 hours I kicked it back down to # 2 . I checked the air temps coming out of the stove , and on #3 the temps were over 150 F , and on #2 they are about 120 F . I used 120 LBS of pellets in 36 hours while the stove was on # 3 .