Tamar - we have 3 options for the fan: on, auto, and circulate - currently I have them both set to auto which means it should only come on with the heater Stickman - thank you so much for that download! It's nice to read something in mostly layman's terms. I'll have some shopping and exploring to do, but this looks very helpful. My guess is that these are the measurements the installers did when they came out and said the system was functioning well, but step one is to figure out the circuit breaker situation anyway. I'll make my husband poke around a bit on his next day off.