This furnace has been a great match for my forced air system. An engineer on the project surprised me with a call just to advise and get whatever for feedback , says volumes to their product commitment. I use a pellet stove when it's not so cold, with an electric back up I've never used. My firewood consumption has reduced greatly and I'm toasty warm. Obidias has many other choices and don't seem to be bothered by questions. Can't say enough good about the experience.