31 days or 744 hours later..
51.5 hours of run time
31.17 kWh burned ($5.09) (16.4 cents per day)
Theoretically speaking,
if the A7 was working perfectly and pumped in exactly 7,000 BTUh
for 51.5 hours, that would come to 360,500 BTUh used, for the month.
(11,629 BTUh per day).
Using a heating element to make that many BTU hours would require 105.6 kWh. ($17.14).
Per day, that's about 55.5 cents, burning 3.4kWh.. (11.6k BTUh)
A 1200 watt element would have to run about 2.8 hours a day.
Compared to $2 for oil, 55.5 cents isn't all that bad.
Recovery time for the tank will be slow. About 1/2 the speed of the A7.
I guess, if the A7 suddenly dies, we could live with slow recovery times for a while..
