You're not going to get that 500KBTU in Chico, CA in the Winter. More like 300K or less because of atmospheric conditions. You would not have the power available at a normal residential installation to run that monster. By itself it would require a 150A service panel at the equipment pad. More like a 200A with the rest of the equipment. That's in addition to what the home requires.
You want to heat in your are in the Winter you need to go with gas. Regardless of the weather, you will get the rated output, but remember, there are heater issues if you don't start heating before the cold hits.
Sounds good, but you would need an electrician to verify that you have the requirements for the GBB. There is a survey and questionnaire that needs to be done before one is built.
Still, using a heat pump in Winter is problematic. I believe that unit has a gas-fired auxiliary back-up to provide heat if the air temp drops below 50 degrees. Even then, the heat rating is 313K. From the specs: Performance – Heating
@10°C Air/63% RH/26.7°C Water
@50°F Air/63% RH/80°F Water
BTU Output
313,000
If ordered today it might be available at the end of October.
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