So happy we got the two wood inserts for the fireplaces (both upstairs and downstairs). We run the upstairs pretty much non-stop and the basement one on a few evenings when it gets cold enough. Our furnace died in October, but the house hasn't gotten lower than 65. Even during the -20+, we were able to keep the house in the mid to upper 60s. Bonus, the wife wanted (and received) a battery powered chainsaw. We can get about twice the wood in the same amount of time and have a weekend chore we do together.