Ironically, now that we're back in the 20ish°F, I'm using my
18K Mitsubishi Hyper Heat, heat-pump to heat my house (only the upstairs, not my walk-out basement facing the lake) because it costs only about $40-45 a month compared to using my boiler's operating cost with propane and the taco recirculation pump that costs more. I originally installed the heat-pump back in 2016 for my mother's benefit (when she was alive) because I didn't want her to suffer in the summer heat, but eventually experimented on the operating cost of heating the upstairs and letting the downstairs buck (so long as it didn't get freezing temps for the pipes down there) one November just to see what it did cost.
Anyway, I now install heat pumps for people in my area since I bought all the tools and use three-cycles of pressurized nitrogen and vacuum to both test for leaks dry out the mini-split lines (which is what is necessary in order to get the hyper efficient mini-splits down to their crazy efficiency numbers) before filling with 410A.
All to say, go team electric!
Oh, if you do go with a heat-pump and you live where it genuinely gets cold, add the optional heat plate to the outdoor condenser so it cannot freeze up, and for convenience sake a Honeywell remote controller is also nice.
Oh and considering Building HVAC systems use single flares,
I HIGHLY suggest using these fun gaskets at the flares even though I make nice flares because they help prevent leaks at the flares.