A typical home in the northern US might require 120 MBtu of heat for the average winter. HELP!?

a. If this heat were supplied by a natural gas furnace operating at 60 percent efficiency, how many cubic feet of gas would need to be purchased?
b. At a cost of 0.90/ccf, what would it cost to heat this house for one season?
c. If a new 80 percent efficient furnace could be installed at a cost of 4000 dollars, how long would it take to pay back the cost of this furnace assuming gas prices remained the same?

One Response to “A typical home in the northern US might require 120 MBtu of heat for the average winter. HELP!?”

  1. Irv S Says:

    A recent gas bill will give you the numbers you need.
    BTU/ccf. and the latest price per ccf.
    Happy number crunching.