[ip26]

Wow, that's nearly 70kWh/day for the entire winter. Most units are only 4-8kW, which suggests your system is running 50-100% of the entire winter.

Using these numbers and an average COP of 2.5 (guess) you're at about 6 therms of gas per day, or about $5-6 while the electricity sets you back about $8.

When was your home built? When I was in the northern front range, we averaged maybe 1.5-2 therms of gas per day.

[swimorsinka]

1978. In reality the worst months are $300+ and the others are less, so the average isn’t really $300 - probably more like $200 or $250.

But yes, this is another reason I want to move. I’ve done all the insulating I can easily do without tearing everything down and starting again.

70 kWh a day sounds about right. That’s what I calculated for a max load when I was sizing solar systems.