- Joined
- Oct 2, 1998
- Messages
- 48,191
I switch between heat pump and propane furnace when it gets to about 35 or below. I don't know the exact crossover point where it's most economical, but I think it's probably not far off.I already know lol just felt like being a dork on this lovely Sunday. It’s nice to rest and play on the internet, this week has been rough on a heating guy!



