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Overstock Furnace Special!

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 73-91 of 91 results
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  • Goodman GMS81005CN

    100,000 BTU Furnace, 80% Efficiency, Single-Stage Burner, 2,000 CFM Multi-Speed Blower, Upflow/Horizontal Flow Application

    $ 614.99 Free Shipping

    Or as low as /mo

    (41 Reviews)
  • Goodman GMS81005CX

    Low NOx Emission 100,000 BTU Furnace, 80% Efficiency, Single-Stage Burner, 2,000 CFM Multi-Speed Blower, Upflow/Horizontal Flow Application

    $ 681.99 Free Shipping

    Or as low as /mo

    (41 Reviews)
  • Goodman GMS81205DN

    120,000 BTU Furnace, 80% Efficiency, Single-Stage Burner, 2,000 CFM Multi-Speed Blower, Upflow/Horizontal Flow Application

    $ 703.99 Free Shipping

    Or as low as /mo

    (41 Reviews)
  • Goodman GMS81205DX

    Low NOx Emission 120,000 BTU Furnace, 80% Efficiency, Single-Stage Burner, 2,000 CFM Multi-Speed Blower, Upflow/Horizontal Flow Application

    $ 812.99 Free Shipping

    Or as low as /mo

    (41 Reviews)
  • Goodman GMSS920402BN

    40,000 BTU Furnace, 92% Efficiency, 1-Stage Burner, 800 CFM Multi-Speed Blower, Upflow/Horizontal Flow Application

    $ 679.99 Free Shipping

    Or as low as /mo

    (15 Reviews)
  • Goodman GMSS920603BN

    60,000 BTU Furnace, 92% Efficiency, 1-Stage Burner, 1200 CFM Multi-Speed Blower, Upflow/Horizontal Flow Application

    $ 696.99 Free Shipping

    Or as low as /mo

    (15 Reviews)
  • Goodman GMSS920803BN

    80,000 BTU Furnace, 92% Efficiency, 1-Stage Burner, 1200 CFM Multi-Speed Blower, Upflow/Horizontal Flow Application

    $ 758.99 Free Shipping

    Or as low as /mo

    (15 Reviews)
  • Goodman GMSS920804CN

    80,000 BTU Furnace, 92% Efficiency, 1-Stage Burner, 1600 CFM Multi-Speed Blower, Upflow/Horizontal Flow Application

    $ 798.99 Free Shipping

    Or as low as /mo

    (15 Reviews)
  • Goodman GMSS920805CN

    80,000 BTU Furnace, 92% Efficiency, 1-Stage Burner, 2000 CFM Multi-Speed Blower, Upflow/Horizontal Flow Application

    $ 826.99 Free Shipping

    Or as low as /mo

    (15 Reviews)
  • Goodman GMSS921004CN

    100,000 BTU Furnace, 92% Efficiency, 1-Stage Burner, 1600 CFM Multi-Speed Blower, Upflow/Horizontal Flow Application

    $ 865.99 Free Shipping

    Or as low as /mo

    (15 Reviews)
  • Goodman GMSS921005CN

    100,000 BTU Furnace, 92% Efficiency, 1-Stage Burner, 2000 CFM Multi-Speed Blower, Upflow/Horizontal Flow Application

    $ 890.99 Free Shipping

    Or as low as /mo

    (15 Reviews)
  • Goodman GMSS921205DN

    120,000 BTU Furnace, 92% Efficiency, 1-Stage Burner, 2000 CFM Multi-Speed Blower, Upflow/Horizontal Flow Application

    $ 943.99 Free Shipping

    Or as low as /mo

    (15 Reviews)
  • 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 GMVC80604BN

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

    $ 940.00 Free Shipping

    Or as low as /mo

    (1 Review)
  • Goodman GMVC80805CN

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

    $1,005.00 Free Shipping

    Or as low as /mo

    (1 Review)
  • Goodman GMVC80805CX

    Low NOx Emission 80,000 BTU Furnace, 80% Efficiency, 2-Stage Burner, 2,000 CFM Variable Speed Blower, Upflow/Horizontal Flow Application

    $1,005.00 Free Shipping

    Or as low as /mo

    (1 Review)