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Natural Gas or Propane (LP) Fuel, Water Boilers

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 32 results
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  • Rinnai I060SN

    60,000 BTU, 95% Efficiency, Natural Gas/LP, Wall-Mounted, Condensing Gas Boiler

    $2,091.75 Free Shipping
    Not In Stock

    Or as low as

    (0 Reviews)
  • Rinnai I090SN

    90,000 BTU, 95% Efficiency, Natural Gas/LP, Wall-Mounted, Condensing Gas Boiler

    $2,246.25 Free Shipping
    Not In Stock

    Or as low as

    (0 Reviews)
  • Rinnai I120SN

    120,000 BTU, 95% Efficiency, Natural Gas/LP, Wall-Mounted, Condensing Gas Boiler

    $2,411.25 Free Shipping
    Not In Stock

    Or as low as

    (0 Reviews)
  • Rinnai I150SN

    150,000 BTU, 95% Efficiency, Natural Gas/LP, Wall-Mounted, Condensing Gas Boiler

    $2,643.75 Free Shipping
    Not In Stock

    Or as low as

    (0 Reviews)
  • Rinnai I060CN

    60,000 BTU, 95% Efficiency, 4.1 GPM, Natural Gas/LP, Wall-Mounted, Condensing Combi Boiler

    $2,568.75 Free Shipping
    Not In Stock

    Or as low as

    (0 Reviews)
  • Rinnai I090CN

    90,000 BTU, 95% Efficiency, 4.1 GPM, Natural Gas/LP, Wall-Mounted, Condensing Combi Boiler

    $2,868.75 Free Shipping
    Not In Stock

    Or as low as

    (0 Reviews)
  • Rinnai I120CN

    120,000 BTU, 95% Efficiency, 5.1 GPM, Natural Gas/LP, Wall-Mounted, Condensing Combi Boiler

    $3,018.75 Free Shipping
    Not In Stock

    Or as low as

    (0 Reviews)
  • Rinnai M060SN

    60,000 BTU, 95% Efficiency, 2.6 GPM, Natural Gas/LP, Wall-Mounted, Condensing Gas Boiler

    $2,023.45 Free Shipping
    Not In Stock

    Or as low as

    (0 Reviews)
  • Rinnai M090SN

    90,000 BTU, 95% Efficiency, 4.2 GPM, Natural Gas/LP, Wall-Mounted, Condensing Gas Boiler

    $1,746.00 Free Shipping
    In Stock

    Or as low as

    (0 Reviews)
  • Rinnai M120SN

    120,000 BTU, 95% Efficiency, 4.2 GPM, Natural Gas/LP, Wall-Mounted, Condensing Gas Boiler

    $2,302.95 Free Shipping
    Not In Stock

    Or as low as

    (0 Reviews)
  • Rinnai M160SN

    160,000 BTU, 95% Efficiency, 4.2 GPM, Natural Gas/LP, Wall-Mounted, Condensing Gas Boiler

    $2,531.75 Free Shipping
    Not In Stock

    Or as low as

    (0 Reviews)
  • Rinnai M060CN

    60,000 BTU, 95% Efficiency, 2.6 GPM, Natural Gas/LP, Wall-Mounted, Condensing Gas Boiler

    $2,076.17 Free Shipping
    Not In Stock

    Or as low as

    (0 Reviews)
  • Rinnai M090CN

    90,000 BTU, 95% Efficiency, 4.2 GPM, Natural Gas/LP, Wall-Mounted, Condensing Combi Boiler

    $2,586.35 Free Shipping
    Not In Stock

    Or as low as

    (0 Reviews)
  • Rinnai M120CN

    120,000 BTU, 95% Efficiency, 4.2 GPM, Natural Gas/LP, Wall-Mounted, Condensing Combi Boiler

    $2,657.85 Free Shipping
    Not In Stock

    Or as low as

    (0 Reviews)
  • Rinnai M160CN

    160,000 BTU, 95% Efficiency, Natural Gas/LP, Wall-Mounted, Condensing Combi Boiler

    $2,164.00 Free Shipping
    In Stock

    Or as low as

    (0 Reviews)
  • Crown Boiler Company BSI172SN

    172,000 BTU, Steam Boiler, 80.6% Efficiency, Standing Pilot, Natural Gas

    $3,307.99 Free Shipping
    Not In Stock

    Or as low as

    (0 Reviews)
  • Crown Boiler Company BWF061EN

    61,000 BTU, Water Boiler, 83.3% Efficiency, Intermittent Pilot, Natural Gas / LP Convertible, Power Vented

    $2,396.99 Free Shipping
    Not In Stock

    Or as low as

    (2 Reviews)
  • Crown Boiler Company BWF095EN

    95,000 BTU, Water Boiler, 83.1% Efficiency, Intermittent Pilot, Natural Gas / LP Convertible, Power Vented

    popular
    $2,589.99 Free Shipping
    Not In Stock

    Or as low as

    (2 Reviews)
  • Crown Boiler Company BWF128EN

    128,000 BTU, Water Boiler, 82.8% Efficiency, Intermittent Pilot, Natural Gas / LP Convertible, Power Vented

    popular
    $2,794.99 Free Shipping
    Not In Stock

    Or as low as

    (2 Reviews)
  • Crown Boiler Company BWF162EN

    162,000 BTU, Water Boiler, 82.5% Efficiency, Intermittent Pilot, Natural Gas / LP Convertible, Power Vented

    $2,629.99 Free Shipping
    Not In Stock

    Or as low as

    (2 Reviews)
  • Crown Boiler Company BWF195EN

    195,000 BTU, Water Boiler, 82.3% Efficiency, Intermittent Pilot, Natural Gas / LP Convertible, Power Vented

    $3,211.99 Free Shipping
    Not In Stock

    Or as low as

    (2 Reviews)
  • Crown Boiler Company BWF229EN

    229,000 BTU, Water Boiler, 82% Efficiency, Intermittent Pilot, Natural Gas / LP Convertible, Power Vented

    $3,479.99 Free Shipping
    Not In Stock

    Or as low as

    (2 Reviews)
  • Crown Boiler Company CWD-060

    60,000 BTU, Water Boiler, 85.1% Efficiency, Electronic Ignition, Natural Gas/LP, Direct Vented

    popular
    $2,604.99 Free Shipping
    Not In Stock

    Or as low as

    (0 Reviews)
  • Crown Boiler Company CWD-083

    82,500 BTU, Water Boiler, 85.1% Efficiency, Electronic Ignition, Natural Gas/LP, Direct Vented

    $2,782.99 Free Shipping
    Not In Stock

    Or as low as

    (0 Reviews)