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Starting at $462.99, 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 25-48 of 113 results
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  • Comfort-Aire GDD80A072B4XE

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

    $ 587.99 Free Shipping
    (0 Reviews)
  • Comfort-Aire GDD80A090B4XE

    90,000 BTU Furnace, 80% Efficiency, 1-Stage Burner, 1,600 CFM Multi-Speed Blower, Dedicated Downflow Application

    $ 621.99 Free Shipping
    (0 Reviews)
  • Comfort-Aire GDD80A108C5XE

    108,000 BTU Furnace, 80% Efficiency, 1-Stage Burner, 2,000 CFM Multi-Speed Blower, Dedicated Downflow Application

    $ 631.99 Free Shipping
    (0 Reviews)
  • Comfort-Aire GDD80A126D5XE

    126,000 BTU Furnace, 80% Efficiency, 1-Stage Burner, 2,000 CFM Multi-Speed Blower, Dedicated Downflow Application

    $ 667.99 Free Shipping
    (0 Reviews)
  • Comfort-Aire GDD95A054B4XE

    54,000 BTU Furnace, 95% Efficiency, 1-Stage Burner, 1,600 CFM Fixed Speed PSC, Dedicated Downflow Application

    $ 928.75 Free Shipping
    (0 Reviews)
  • Comfort-Aire GUH80A045A3XE

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

    $ 502.99 Free Shipping
    (0 Reviews)
  • Comfort-Aire GUH80A054A3XE

    54,000 BTU Furnace, 80% Efficiency, 1-Stage Burner, 1,200 CFM Multi-Speed Blower, Upflow/Horizontal Flow Application

    $ 520.99 Free Shipping
    (0 Reviews)
  • Comfort-Aire GUH80A072B4XE

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

    $ 576.99 Free Shipping
    (0 Reviews)
  • Comfort-Aire GUH80A072C5XE

    72,000 BTU Furnace, 80% Efficiency, 1-Stage Burner, 2,000 CFM Fixed Speed PSC Blower, Upflow/Horizontal Flow Application

    $ 584.99 Free Shipping
    (0 Reviews)
  • Comfort-Aire GUH80A090B4XE

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

    $ 594.99 Free Shipping
    (0 Reviews)
  • Comfort-Aire GUH80A090C5XE

    90,000 BTU Furnace, 80% Efficiency, 1-Stage Burner, 2,000 CFM Multi-Speed Blower, Upflow/Horizontal Flow Application

    $ 640.99 Free Shipping
    (0 Reviews)
  • Comfort-Aire GUH80A108C5XE

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

    $ 645.99 Free Shipping
    (0 Reviews)
  • Comfort-Aire GUH80A126D5XE

    126,000 BTU Furnace, 80% Efficiency, 1-Stage Burner, 2,000 CFM Multi Speed Blower, Upflow/Horizontal Flow Application

    $ 689.99 Free Shipping
    (0 Reviews)
  • Comfort-Aire GUH95A038B4XE

    38,000 BTU Furnace, 95% Efficiency, 1-Stage Burner, 1,600 CFM Fixed Speed PSC, Upflow/Horizontal Flow Application

    $ 744.46 Free Shipping
    (0 Reviews)
  • Comfort-Aire GUH95A054B4XE

    54,000 BTU Furnace, 95% Efficiency, 1-Stage Burner, 1,600 CFM Fixed Speed PSC, Upflow/Horizontal Flow Application

    $ 783.68 Free Shipping
    (0 Reviews)
  • Comfort-Aire GUH95A072C5XE

    72,000 BTU Furnace, 95% Efficiency, 1-Stage Burner, 2,000 CFM Fixed Speed PSC, Upflow/Horizontal Flow Application

    $ 715.99 Free Shipping
    (0 Reviews)
  • Comfort-Aire GUH95A090C5XE

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

    $ 898.12 Free Shipping
    (0 Reviews)
  • Comfort-Aire GUH95A108D5XE

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

    $ 934.58 Free Shipping
    (0 Reviews)
  • Comfort-Aire GUH95A120D5XE

    120,000 BTU Furnace, 95% Efficiency, 1-Stage Burner, 2,000 CFM Fixed Speed PSC, Upflow/Horizontal Flow Application

    $ 998.84 Free Shipping
    (0 Reviews)
  • Comfort-Aire GUH95T060B4XE

    60,000 BTU Furnace, 95% Efficiency, 2-Stage Burner, 1,600 CFM Variable Speed ECM, Upflow/Horizontal Flow Applications

    $ 978.88 Free Shipping
    (0 Reviews)
  • Goodman GCSS960402BN

    40,000 BTU Furnace, 96% Efficiency, 1-Stage Burner, 800 CFM Single-Speed Blower, Downflow/Horizontal Flow Application

    popular
    $ 866.99 Free Shipping
    (1 Review)
  • Goodman GCSS960603BN

    60,000 BTU Furnace, 96% Efficiency, 1-Stage Burner, 1200 CFM Single-Speed Blower, Downflow/Horizontal Flow Application

    popular
    $ 812.99 Free Shipping
    (1 Review)
  • Goodman GCVM960805DX

    80,000 BTU Furnace, 96% Efficiency, Modulating Burner, 2000 CFM Variable Speed Blower, Horizontal / Downflow Application

    $1,576.99 Free Shipping
    (0 Reviews)
  • Goodman GDH80403AX

    Low NOx Emission 40,000 BTU Furnace, 80% Efficiency, 2-Stage Burner, 1,200 CFM Multi-Speed Blower, Dedicated Downflow Application

    popular
    $ 570.99 Free Shipping
    (9 Reviews)

In 2002 Alpine Home Air Products became the first company to sell heating, air conditioning and indoor air-quality products online. We have proudly served hundreds of thousands of customers, helping them save time and money by buying their products direct.