Are you running in manuel mode or auto? When its cold out auto with a thermostat cycle's very quickly. So just running in manuel and trying to figure how cold it will be outside during the day to keep the house ok with no one home, but a dog and cat. I hear harmons have a lot more features for the thermo option, Hi-lo or something like that. Running on number 3 last night and today and the temp is in 70's. Stove Chow, Fireside ultra's.