I just dont like moving parts. My problem with heat pumps is that you have to replace every 10-20 years which seems wasteful.
How much material in a heat pump is recyclable and how much isn't, compared to a furnace?
We are trying to reduce CO2 and methane in the atmosphere. Throwing away the non-recyclable parts of heat pumps isn't as big of a concern. Polluting the ground and water isn't even as big a concern. Certainly they are concerns, but they pale in comparison.