we moved in 5years ago into a bi-level [rancher] stove was upstairs heated 1000sf 67F-73f deg.This summer I put it downstairs all new pipe two.Basemt 900sf now 70f-78f deg. Upstairs gas house heater is sill running 35f deg outside.What stoves are good. i like the reg 1100 but to small,burn times suck.Friends has regency 2400 to small to. Right now looking at a Q-F 5700 step top. I will be putting a 8"=16"return from house heater in I already tested it and it works! just need a bigger box and longer burn times.