I heeded the advice of my fellow hearthers and put a stove in the basement to supplement the 1st floor insert to heat when the temps drop below the teens. This week was the first real test with temps dropping to about -10 last night and I awoke to 68 degree temps inside. I see no need for any propane in the forseable future. Two stoves heating nearly 4000 sq ft in our relatively cold weather won't set any records but it sure has made it worthwhile to our family. Hopefully I will be able to finish the basement this year which will help hold the heat in even better. In the words of the great Kentucky Mudflap - "Thanks and laudulations gents"