Been burning the englander 30 for about a month now. Outside temps are just getting in the 20s and 30s, and even with the stove in the basement and just a small fan at the bottom of the stairs we can get the main floor up to 65-66 so far, but we dont burn full time,only when we are home, so we have to reheat the basement every time, just about. We normanlly keep the programmable thermostat at 63 when we are here, so it is nice that on these colder days we have not had the furnace running.. I'm happy and if we sit in the basement i'm very comfortable.