Finally got cold in SE PA for a couple days. Lower teens at night mid 20's day. I have a 1600 sq ft raised rancher w/finishished basment. Burning oak, locust, and whatever else I could get free( OK I paid a guy $40.00 for a pickup load of seasoned split oak) my house stayed between 77deg high and 68deg low. Havn't used any oil to heat my upstairs yet. Downstairs is set to 62 but the heater rarely comes on. I wanted to wait untill it got cold to comment on this stove, this is the best money I ever spent. Burns all day while I'm at work, and all night while sleeping. Just good ole white ash when it burns down. I would recomend this stove to everyone but then I wouldn't be able to get as much free wood.