This has been what’s in my house/apartments since I was 8 and first learned about them when ours went out and my grandpa came over to fix it.
Heat pump, with 1-3 rows of coils for electric backup heat. Lowest Temps I’ve experienced were -20F and highest were 110F. Struggled to cool below 75 at the top, and heat above 60 at the lows. But those are rare extremes (on the low side anyway, I expect the high side to “peak” more often in coming years)
My heat pump does fine at 0F. And has done since the late 80s. And if it can’t it has electric backup heat.
This has been what’s in my house/apartments since I was 8 and first learned about them when ours went out and my grandpa came over to fix it.
Heat pump, with 1-3 rows of coils for electric backup heat. Lowest Temps I’ve experienced were -20F and highest were 110F. Struggled to cool below 75 at the top, and heat above 60 at the lows. But those are rare extremes (on the low side anyway, I expect the high side to “peak” more often in coming years)
And none of the systems were younger than 2005.
Ground source or air?
Air. Just a bog-standard midrange heat pump, though it’s probably grossly oversized.