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Natural Gas / Propane (LP) Fuel, Furnaces

BTU CALCULATOR
BTU CALCULATOR

BTU stands for "British Thermal Unit" and measures the heating or cooling capacity of a furnace or air conditioning unit. Enter your homes square footage to see how many BTU's are required to adequately heat or cool it.

Enter the square footage of your home (or room) and press Go.

Square Footage

GO
This calculator is for estimating capacity only, and does not give exact equipment capacities for your home.
Displaying 1-24 of 138 results
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  • Goodman GMSS960402BN

    40,000 BTU Furnace, 96% Efficiency, Single-Stage Burner, 800 CFM Multi-Speed Blower, Upflow/Horizontal Flow Application

    $ 764.99 Free Shipping

    Or as low as /mo

    (46 Reviews)
  • Goodman GMSS960603BN

    60,000 BTU Furnace, 96% Efficiency, Single-Stage Burner, 1200 CFM Multi-Speed Blower, Upflow/Horizontal Flow Application

    popular
    $ 785.99 Free Shipping

    Or as low as /mo

    (46 Reviews)
  • Goodman GMSS960803BN

    80,000 BTU Furnace, 96% Efficiency, Single-Stage Burner, 1200 CFM Multi-Speed Blower, Upflow/Horizontal Flow Application

    $ 863.99 Free Shipping

    Or as low as /mo

    (46 Reviews)
  • Goodman GMSS960804CN

    80,000 BTU Furnace, 96% Efficiency, Single-Stage Burner, 1600 CFM Multi-Speed Blower, Upflow/Horizontal Flow Application

    $ 901.99 Free Shipping

    Or as low as /mo

    (46 Reviews)
  • Goodman GMVC960403BN

    40,000/28,000 BTU Furnace, 96% Efficiency, 2-Stage Burner, 1,200 CFM Variable Speed Blower, Upflow/Horizontal Flow Application

    $1,046.00 Free Shipping

    Or as low as /mo

    (12 Reviews)
  • Goodman GMVC960603BN

    60,000/42,000 BTU Furnace, 96% Efficiency, 2-Stage Burner, 1,200 CFM Variable Speed Blower, Upflow/Horizontal Flow Application

    $1,086.00 Free Shipping

    Or as low as /mo

    (12 Reviews)
  • Goodman GMVC960803BN

    80,000/56,000 BTU Furnace, 96% Efficiency, 2-Stage Burner, 1,200 CFM Variable Speed Blower, Upflow/Horizontal Flow Application

    $1,307.00 Free Shipping

    Or as low as /mo

    (12 Reviews)
  • Goodman GMVC960804CN

    80,000/56,000 BTU Furnace, 96% Efficiency, 2-Stage Burner, 1,600 CFM Variable Speed Blower, Upflow/Horizontal Flow Application

    $1,323.00 Free Shipping

    Or as low as /mo

    (12 Reviews)
  • Comfort-Aire GUH80A045A3XE

    45,000 BTU Furnace, 80% Efficiency, 1-Stage Burner, 1,200 CFM Multi-Speed Blower, Upflow/Horizontal Flow Application

    $ 541.99 Free Shipping

    Or as low as /mo

    (0 Reviews)
  • Comfort-Aire GUH80A072B4XE

    72,000 BTU Furnace, 80% Efficiency, 1-Stage Burner, 1,600 CFM Multi-Speed Blower, Upflow/Horizontal Flow Application

    $ 583.99 Free Shipping

    Or as low as /mo

    (0 Reviews)
  • Comfort-Aire GUH80A090B4XE

    90,000 BTU Furnace, 80% Efficiency, 1-Stage Burner, 1,600 CFM Multi-Speed Blower, Upflow/Horizontal Flow Application

    $ 587.99 Free Shipping

    Or as low as /mo

    (0 Reviews)
  • Comfort-Aire GUH80A108C5XE

    108,000 BTU Furnace, 80% Efficiency, 1-Stage Burner, 2,000 CFM Multi-Speed Blower, Upflow/Horizontal Flow Application

    $ 649.99 Free Shipping

    Or as low as /mo

    (0 Reviews)
  • Goodman GMH80403AN

    40,000 BTU Furnace, 80% Efficiency, 2-Stage Burner, 1,200 CFM Multi-Speed Blower, Upflow/Horizontal Flow Application

    $ 506.99 Free Shipping

    Or as low as /mo

    (54 Reviews)
  • Goodman GMH80604BN

    60,000 BTU Furnace, 80% Efficiency, 2-Stage Burner, 1,600 CFM Multi-Speed Blower, Upflow/Horizontal Flow Application

    $ 566.99 Free Shipping

    Or as low as /mo

    (54 Reviews)
  • Goodman GMH80804BN

    80,000 BTU Furnace, 80% Efficiency, 2-Stage Burner, 1,600 CFM Multi-Speed Blower, Upflow/Horizontal Flow Application

    $ 608.99 Free Shipping

    Or as low as /mo

    (54 Reviews)
  • Goodman GMS80804BN

    80,000 BTU Furnace, 80% Efficiency, Single-Stage Burner, 1,600 CFM Multi-Speed Blower, Upflow/Horizontal Flow Application

    $ 565.99 Free Shipping

    Or as low as /mo

    (41 Reviews)
  • Goodman GMH80805CN

    80,000 BTU Furnace, 80% Efficiency, 2-Stage Burner, 2,000 CFM Multi-Speed Blower, Upflow/Horizontal Flow Application

    $ 624.99 Free Shipping

    Or as low as /mo

    (54 Reviews)
  • Goodman GMS80403AN

    40,000 BTU Furnace, 80% Efficiency, Single-Stage Burner, 1,200 CFM Multi-Speed Blower, Upflow/Horizontal Flow Application

    $ 488.99 Free Shipping

    Or as low as /mo

    (41 Reviews)
  • Goodman GMS80603AN

    60,000 BTU Furnace, 80% Efficiency, Single-Stage Burner, 1,200 CFM Multi-Speed Blower, Upflow/Horizontal Flow Application

    $ 513.99 Free Shipping

    Or as low as /mo

    (41 Reviews)
  • Comfort-Aire GUH95A090C5XF

    90,000 BTU Furnace, 95% Efficiency, 1-Stage Burner, 2,000 CFM Multi-Speed PSC, Upflow/Horizontal Flow Application

    $1,019.99 Free Shipping

    Or as low as /mo

    (0 Reviews)
  • Comfort-Aire GUH95A108D5XF

    108,000 BTU Furnace, 95% Efficiency, 1-Stage Burner, 2,000 CFM Multi-Speed PSC, Upflow/Horizontal Flow Application

    $1,049.99 Free Shipping

    Or as low as /mo

    (0 Reviews)
  • Goodman GMS80805CN

    80,000 BTU Furnace, 80% Efficiency, Single-Stage Burner, 2,000 CFM Multi-Speed Blower, Upflow/Horizontal Flow Application

    $ 557.99 Free Shipping

    Or as low as /mo

    (41 Reviews)
  • Comfort-Aire GDD80A054A3XE

    54,000 BTU Furnace, 80% Efficiency, 1-Stage Burner, 1,200 CFM Multi-Speed Blower, Dedicated Downflow Application

    $ 633.99 Free Shipping

    Or as low as /mo

    (0 Reviews)
  • Comfort-Aire GDD80A072B4XE

    72,000 BTU Furnace, 80% Efficiency, 1-Stage Burner, 1,600 CFM Multi-Speed Blower, Dedicated Downflow Application

    $ 631.99 Free Shipping

    Or as low as /mo

    (0 Reviews)