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AMERICA'S HEATING & COOLING STORE™
EST. 2002
Home Air Products™
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Low Profile, Top Air Outlet, Natural Gas / LP

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 47 results
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  • Williams 0743511

    7,400 BTU, 79% Efficiency, Direct-Vent Wall Furnace, Top Air Outlet, Liquid Propane, No Electricity Required

    $ 789.00 Free Shipping

    Or as low as /mo

    (1 Review)
  • Williams 0743512

    7,400 BTU, 79% Efficiency, Direct-Vent Wall Furnace, Top Air Outlet, Natural Gas, No Electricity Required

    popular
    $ 789.00 Free Shipping

    Or as low as /mo

    (2 Reviews)
  • Williams 1403821

    14,000 BTU, 76% AFUE, Direct-Vent Wall Furnace, Top Air Outlet, LP, No Electricity Required

    $ 599.99 Free Shipping

    Or as low as /mo

    (0 Reviews)
  • Williams 1403822

    14,000 BTU, 76% AFUE, Direct-Vent Wall Furnace, Top Air Outlet, Natural Gas, No Electricity Required

    $ 630.99 Free Shipping

    Or as low as /mo

    (1 Review)
  • Williams 1413821

    14,000 BTU, 65% AFUE, High Altitude (2,001 - 4,000'), Direct-Vent Wall Furnace, Top Air Outlet, LP, No Electricity Required

    $ 670.20 Free Shipping

    Or as low as /mo

    (0 Reviews)
  • Williams 1413822

    14,000 BTU, 65% AFUE, High Altitude (2,001 - 4,000'), Direct-Vent Wall Furnace, Top Air Outlet, Natural Gas, No Electricity Required

    $ 670.20 Free Shipping

    Or as low as /mo

    (0 Reviews)
  • Williams 1433821

    14,000 BTU, 76% AFUE, High Altitude (4,001 - 6,000'), Direct-Vent Wall Furnace, Top Air Outlet, LP, No Electricity Required

    $ 670.20 Free Shipping

    Or as low as /mo

    (0 Reviews)
  • Williams 1433822

    14,000 BTU, 65% AFUE, High Altitude (4,001 - 6,000'), Direct-Vent Wall Furnace, Top Air Outlet, Natural Gas, No Electricity Required

    $ 688.99 Free Shipping

    Or as low as /mo

    (0 Reviews)
  • Williams 1453821

    14,000 BTU, 65% AFUE, High Altitude (6,001 - 8,000'), Direct-Vent Wall Furnace, Top Air Outlet, LP, No Electricity Required

    $ 670.20 Free Shipping

    Or as low as /mo

    (0 Reviews)
  • Williams 1453822

    14,000 BTU, 65% AFUE, High Altitude (6,001 - 8,000'), Direct-Vent Wall Furnace, Top Air Outlet, Natural Gas, No Electricity Required

    $ 670.20 Free Shipping

    Or as low as /mo

    (0 Reviews)
  • Williams 1773511

    17,700 BTU, 82% AFUE, Direct-Vent Wall Furnace, Top Air Outlet, Liquid Propane, 120 VAC

    $1,394.40 Free Shipping

    Or as low as /mo

    (1 Review)
  • Williams 1773512

    17,700 BTU, 82% AFUE, Direct-Vent Wall Furnace, Top Air Outlet, Natural Gas, 120 VAC

    popular
    $1,394.40 Free Shipping

    Or as low as /mo

    (2 Reviews)
  • Williams 2203821

    22,000 BTU, 67% AFUE, Direct-Vent Wall Furnace, Top Air Outlet, LP, No Electricity Required

    $ 822.99 Free Shipping

    Or as low as /mo

    (0 Reviews)
  • Williams 2203822

    22,000 BTU, 67% AFUE, Direct-Vent Wall Furnace, Top Air Outlet, Natural Gas, No Electricity Required

    $ 720.60 Free Shipping

    Or as low as /mo

    (0 Reviews)
  • Williams 2213821

    22,000 BTU, 67% AFUE, High Altitude (2,001 - 4,000'), Direct-Vent Wall Furnace, Top Air Outlet, LP, No Electricity Required

    $ 793.99 Free Shipping

    Or as low as /mo

    (0 Reviews)
  • Williams 2213822

    22,000 BTU, 67% AFUE, High Altitude (2,001 - 4,000'), Direct-Vent Wall Furnace, Top Air Outlet, Natural Gas, No Electricity Required

    $ 791.40 Free Shipping

    Or as low as /mo

    (0 Reviews)
  • Williams 2233821

    22,000 BTU, 67% AFUE, High Altitude (4,001 - 6,000'), Direct-Vent Wall Furnace, Top Air Outlet, LP, No Electricity Required

    $ 793.99 Free Shipping

    Or as low as /mo

    (0 Reviews)
  • Williams 2233822

    22,000 BTU, 67% AFUE, High Altitude (4,001 - 6,000'), Direct-Vent Wall Furnace, Top Air Outlet, Natural Gas, No Electricity Required

    $ 791.40 Free Shipping

    Or as low as /mo

    (0 Reviews)
  • Williams 2253822

    22,000 BTU, 67% AFUE, High Altitude (6,001 - 8,000'), Direct-Vent Wall Furnace, Top Air Outlet, Natural Gas, No Electricity Required

    $ 791.40 Free Shipping

    Or as low as /mo

    (0 Reviews)
  • Williams 2509821

    25,000 BTU, 71% AFUE, Monterey Plus Top-Vent Wall Furnace, Top Air Outlet, LP, No Electricity Required

    $ 592.99 Free Shipping

    Or as low as /mo

    (1 Review)
  • Williams 2509822

    25,000 BTU, 71% AFUE, Monterey Plus Top-Vent Wall Furnace, Top Air Outlet, Natural Gas, No Electricity Required

    $ 599.99 Free Shipping

    Or as low as /mo

    (1 Review)
  • Williams 2519822

    25,000 BTU 71% AFUE, High Altitude (2,001 - 4,000'), Monterey Plus Top-Vent Wall Furnace, Top Air Outlet, Natural Gas, No Electricity Required

    $ 616.99 Free Shipping

    Or as low as /mo

    (1 Review)
  • Williams 2539821

    25,000 BTU,High Altitude (4,001 - 6,000'), 71% AFUE, Monterey Plus Top-Vent Wall Furnace, Top Air Outlet, LP, No Electricity Required

    $ 733.99 Free Shipping

    Or as low as /mo

    (1 Review)
  • Williams 2539822

    25,000 BTU, 71% AFUE, High Altitude (4,001 - 6,000'), Monterey Plus Top-Vent Wall Furnace, Top Air Outlet, Natural Gas, No Electricity Required

    $ 616.99 Free Shipping

    Or as low as /mo

    (1 Review)