Oilpan4 wrote: ↑
Sat Aug 10, 2019 10:40 am
You sound exactly like a heat pump sales pamphlet.
Ambitious, nonspecific and completly useless.
Heat pumps are getting better and better. However, ground source heat pumps work far better.
It isn’t always possible to retrofit a good GSHP system. But if it is built into the house from the start, it has very good results.
Our winters are a bit colder than yours. 10 below is not unusual and 20-30 below is not unheard of.
We have no wood stove, no natural gas, our heat is solely from the heat pump and resistance heat as a backup (which hasn’t been used so far).
In the event of a grid outage we have solar panels and batteries.
The trick with our house is it is extremely well insulated with as few “holes” in it as possible. No chimney, no exhaust for the clothes dryer, and all bath fans go through the ERV ventilation system to recover the heat before it is expelled.
Combined with a lot of thermal mass and using passive solar it is extremely efficient. We calculated we needed 19kW of solar to cover our annual energy needs (house and two cars). Turns out we needed about 11kW.