If we weren't heating with the Sanyos, the peak winter months would likely average around 600 kwh.
The oil burner and circulator pump would be running a lot, plus there would be some space heater use too..
The Sanyos saved us some major bucks this past winter.
I realize the winter was pretty mild, but we kept the whole house
warm 24/7.
If next winter is 'normal', we will likely keep the house cooler at 18 to 20C (64.4 to 68F).
So,
hopefully, the power use won't increase that much.