Again, I'll have to re-confirm these numbers but - $220(summer 4 months) + $710 (winter 3 months) + $600 (remainder of the year) = $1530/yr total
$3900- $1530 = $2430 savings , so it was figured in 4yrs they would return the investment (after the 30% govt rebate)
I know one thing, in the summer my electric bills are like $270/month for the central AC. That sucks.
I'm really on the fence (still),
do I invest $6000 into a coal system by the time its installed, or what?
I am really interested to see what the electric bills are for the existing customer references you received. Getting the exact system they have installed for $9400 and if monthly electric is the same as estimated cost of winter coal usage and summer AC usage, I'd say you have a viable solution.
Maybe I missed it, how many wells did they say you would need for your system?