ok. if i figure out how much ccf my current gas furnace needed last year to heat my house, and considering its efficiency (80%), i convert that to equivalent kW-hr of energy. Let's say it's 9000. i understand that most modern heat pumps need 1kW-hr of electricity to produce 3kW-hr of heat energy (around 300% efficient). So does that mean my new heat pump (HSPF of 9) will need around 3000 kW-hr of electricity to accomplish the same thing as the gas furnace its replacing? TIA
@ChiefD
What part of the country do you live in?
OK. Just wanted to see if you were in an area where heat pumps are viable, and it sounds like you are.
As for the math above, I have no idea. I've never been one to whittle down my utility bills and production and all that because I believe my gains/losses dollar wise would be minimal. And I simply don't care that much on that because utility prices go up and down so much I'd just drive myself nuts.
So honestly, I can't answer the above question. What I would say is I would never go heat pump and get rid of my gas furnace for the following reasons:
1. The life of a heat pump is about 10-12 years, versus about 18 years old for an air conditioner. So your replacement cost is going to be much faster with a heat pump.
2. You can get a 96% furnace these days, so you are getting .96 of heat for every 1.00 you spend. That's fine with me.
3. I don't want to be tied to one utility. But that's just me.
4. If you go all electric, when that heat pump can't keep up on really cold nights that air handler with back-up heat strips is going to be REALLY expensive to run. Someone mentioned it above - it's basically toaster type coils used to heat your house. They pull A LOT of juice.
If you start getting pricing and such or have other questions, go ahead and post in that other thread so we don't clutter up this page. I can definitely tell you if you are getting a fair deal or not.