Interesting: comparing the DLCPRBH18AAK you linked to the MXZ-SM42NAMHZ2 I was quoted for, yours has maximum efficiency at a relatively high output level while mine has maximum efficiency at it’s lowest output level. And yours even is even labeled as able to put out more heat at 5F than 17F, without losing COP, which is pretty weird?
So you need roughly 50 percent more efficiency for a heat pump to be just as efficient.
Does the market sell these? Yes:
https://ashp.neep.org/#!/product/134030/7/25000/95/7500/0///0
The “min max” setup is several splits of the tier above, combined with a 96 percent gas furnace that is ducted.
Interesting: comparing the DLCPRBH18AAK you linked to the MXZ-SM42NAMHZ2 I was quoted for, yours has maximum efficiency at a relatively high output level while mine has maximum efficiency at it’s lowest output level. And yours even is even labeled as able to put out more heat at 5F than 17F, without losing COP, which is pretty weird?
Yes that’s weird and probably wrong. Real question is what would the crossover temperature be if you had both gas and these.