Nice of them to share
I still have to wonder just what is going on with those air to air heat pump houses. NZ $1,200 a month to run them still seems way out of line especially considering your electric cost is 1/10th that. And where you live they aren't even trying to force heat out of super cold air.
https://www.aquaplumbingsarasota.com/blog/geothermal-vs-air-source-heat-pumps
Those geothermal ones sound really interesting. Power prices do seem to be high here, no matter which provider you go with. Then there's the lines company adding their fee which seems to creep up regularly.




