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    Victory Natural Gas Direct Vent Hot Water Boiler with 120,000 Input BTU and 90,000 Output BTU, Blue

    Victory Natural Gas Direct Vent Hot Water Boiler with 120,000 Input BTU and 90,000 Output BTU, Blue

    Free Shipping on Over 500K Items!

    The Slant/Fin Victory 4.7 gal. Natural Gas Boiler features a reliable cast-iron heat exchanger that provides powerful heating for up to 2,000 sq. ft. Energy Star qualified for year-round energy and money savings. This efficient boiler has a compact... more

    $2,750.22

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    Victory Natural Gas Direct Vent Hot Water Boiler with 60,000 Input BTU and 45,000 Output BTU, Blue

    Victory Natural Gas Direct Vent Hot Water Boiler with 60,000 Input BTU and 45,000 Output BTU, Blue

    Free Shipping on Over 500K Items!

    The Victory 3.0-Gal. Natural Gas Boiler helps you maintain a comfortable home environment thanks to its powerful sealed-combustion system, which does not consume warm household air. Designed for use with natural gas. This powerful boiler features a... more

    $2,370.28

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    TekSupply 113777 Hydro Smart Condensing Micro-Boiler - Propane 120K BTU, As Shown

    TekSupply 113777 Hydro Smart Condensing Micro-Boiler - Propane 120K BTU, As Shown

    Features This compact condensing micro-boiler is a powerful unit with a wide BTU range and is perfect for residential applications, whether its general hot water heating or in-floor radiant heating. These pre-assembled units allow you to save labor... more

    $1,863.76

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    TekSupply 113779 Hydro Smart Condensing Micro-Boiler - Propane 199K BTU, As Shown

    TekSupply 113779 Hydro Smart Condensing Micro-Boiler - Propane 199K BTU, As Shown

    Features This compact condensing micro-boiler is a powerful unit with a wide BTU range and is perfect for residential applications, whether its general hot water heating or in-floor radiant heating. These pre-assembled units allow you to save labor... more

    $2,735.76

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    Victory Natural Gas Direct Vent Hot Water Boiler with 90,000 Input BTU and 68,000 Output BTU, Blue

    Victory Natural Gas Direct Vent Hot Water Boiler with 90,000 Input BTU and 68,000 Output BTU, Blue

    Free Shipping on Over 500K Items!

    The advanced-design cast-iron heat exchanger of the Victory 3.8-Gal. Natural Gas Boiler provides powerful heating for up to 1,500 sq. ft. while maintaining high energy efficiency. The boiler's durable metal push nipples help prevent leakage. Its sealed... more

    $2,546.48

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    Liberty 131,000 to 175,000 BTU Input 117,000 to 131,000 BTU Output Hot Water Oil Boiler without Coil, Green

    Liberty 131,000 to 175,000 BTU Input 117,000 to 131,000 BTU Output Hot Water Oil Boiler without Coil, Green

    Free Shipping on Over 500K Items!

    This Heating Oil Boiler Less Coil features a high-efficiency Beckett burner and a cast-iron heat exchange for reliable performance in your home. It runs on heating oil and has an annual fuel utilization efficiency rating of 86%. The boiler features a... more

    $2,599.00

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    TekSupply 113780 Hydro Smart Condensing Micro-Boiler - Natural Gas 199K BTU, As Shown

    TekSupply 113780 Hydro Smart Condensing Micro-Boiler - Natural Gas 199K BTU, As Shown

    Features This compact condensing micro-boiler is a powerful unit with a wide BTU range and is perfect for residential applications, whether its general hot water heating or in-floor radiant heating. These pre-assembled units allow you to save labor... more

    $2,723.17

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    TekSupply 113778 Hydro Smart Condensing Micro-Boiler - Natural Gas 120K BTU, As Shown

    TekSupply 113778 Hydro Smart Condensing Micro-Boiler - Natural Gas 120K BTU, As Shown

    Features This compact condensing micro-boiler is a powerful unit with a wide BTU range and is perfect for residential applications, whether its general hot water heating or in-floor radiant heating. These pre-assembled units allow you to save labor... more

    $1,851.26

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    Improvements Outdoor Portable Tankless Water Heater-41,000 BTU

    Improvements Outdoor Portable Tankless Water Heater-41,000 BTU

    The 41,000 BTU Outdoor Portable Tankless Water Heater provides hot water, fuss-free. The 41,000 BTU Outdoor Portable Tankless Water Heater makes it easy for you to wash your car, boat, even your dog, using hot water. This portable water heater needs no... more

    $199.99

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    Improvements

    (100,000+)
    Eccotemp 45HI-NG Indoor Natural Gas Tankless Water Heater

    Eccotemp 45HI-NG Indoor Natural Gas Tankless Water Heater

    The Eccotemp 45HI-NG is the largest indoor model of the Eccotemp tankless line. Rated at impressive 6.8 GPM and 140,000 BTU per hour, the 45HI-NG can meet all the hot-water needs of a standard home or apartment with one or two bathrooms, as well as... more

    $488.00

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    Modine 106269 Heater Hot Water - 12,600 BTU/Steam 18K BTU

    Modine 106269 Heater Hot Water - 12,600 BTU/Steam 18K BTU

    Ideal for heating buildings with large open areas and low ceilings- These horizontal units operate with either steam or hot water and counter heat loss along outside building walls, especially where windows are present- Compact, lightweight, horizontal... more

    $520.83

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    Jensen Reliance TS-110-LE 140,000 BTU Tankless Outdoor Propane Water Heater (Tankless Outdr 140k)

    Jensen Reliance TS-110-LE 140,000 BTU Tankless Outdoor Propane Water Heater (Tankless Outdr 140k)

    Includes remote temperature control Increased flow rates provide continuous hot water up to 6.6 GPM Includes internal freeze protection 140,000 BTU Unit Assembly: Assembled more

    $796.99

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    Overstock.com

    (600,000+)
    Rinnai Propane External Max BTU 120k Max Flow 5.3gpm (White) (Metal)

    Rinnai Propane External Max BTU 120k Max Flow 5.3gpm (White) (Metal)

    Enjoy convenient hot water with this propane water heater. Featuring 120,000 max BTU and 5.3 gpm max flow, this water heater provides plenty of heat for luxuriously hot water. Details: 120,000 max BTU 5.3 gpm max flow Temperature controlled Continuous... more

    $596.49

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    Overstock.com

    (600,000+)
    Eccotemp FVI-12 High Capacity Tankless Water Heater

    Eccotemp FVI-12 High Capacity Tankless Water Heater

    Efficient, high capacity tankless water heating system Comes with stainless horizontal vent kit Cranks out up to 3.4 gallons of steaming hot water a minute 74,000 BTU unit runs only when water runs Big enough to handle multiple hot water applications... more

    $269.99

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    Eccotemp FVI-12 High Capacity Tankless Water Heater - Propane

    Eccotemp FVI-12 High Capacity Tankless Water Heater - Propane

    Efficient, high capacity tankless water heating system Comes with stainless horizontal vent kit Cranks out up to 3.4 gallons of steaming hot water a minute 74,000 BTU unit runs only when water runs Big enough to handle multiple hot water applications... more

    $269.99

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    New Yorker CG 70 DNI-G2 198000 BTU Hot Water Boiler

    New Yorker CG 70 DNI-G2 198000 BTU Hot Water Boiler

    The Right Choice When the time comes to replace your existing boiler, and you need a reliable and affordable heat source, ask your contractor about the New Yorker CG-D Series .An Economical Choice The CG-D's cast iron boiler design maximizes heat... more

    $2,295.00

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    New Yorker CG 60 DNI-G2 164000 BTU Hot Water Boiler

    New Yorker CG 60 DNI-G2 164000 BTU Hot Water Boiler

    The Right Choice When the time comes to replace your existing boiler, and you need a reliable and affordable heat source, ask your contractor about the New Yorker CG-D Series .An Economical Choice The CG-D's cast iron boiler design maximizes heat... more

    $1,995.00

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    "A.O. Smith GW-2500 Commercial Hot Water Supply, Boiler, Natural Gas, Burkay Genesis, 2,490,000 BTU I"

    "A.O. Smith GW-2500 Commercial Hot Water Supply, Boiler, Natural Gas, Burkay Genesis, 2,490,000 BTU I"

    "A.O. Smith GW-2500 Commercial Hot Water Supply, Boiler, Natural Gas, Burkay Genesis, 2,490,000 BTU Input Today's best value in gas boiler performance! The Burkay Genesis line of mid-range efficiency gas boilers lets you have it all: outstanding... more

    $28,248.99

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    "A.O. Smith GWO-2500 Commercial Hot Water Supply, Boiler, Natural Gas, Burkay Genesis, 2,490,000 BTU "

    "A.O. Smith GWO-2500 Commercial Hot Water Supply, Boiler, Natural Gas, Burkay Genesis, 2,490,000 BTU "

    "A.O. Smith GWO-2500 Commercial Hot Water Supply, Boiler, Natural Gas, Burkay Genesis, 2,490,000 BTU Input Today's best value in gas boiler performance! The Burkay Genesis line of mid-range efficiency gas boilers lets you have it all: outstanding... more

    $29,157.31

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    AO Smith HW-420 Burkay 344.400 BTU Output Electronic Ignition Hot Water Boiler (Nat Gas)

    AO Smith HW-420 Burkay 344.400 BTU Output Electronic Ignition Hot Water Boiler (Nat Gas)

    AO Smith HW-420 Burkay 344.400 BTU Output Electronic Ignition Hot Water Boiler (Nat Gas) more

    $4,763.95

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    Electro Industries EB-MX-20 - 20 kW - 68K BTU - Hot Water Electric Boiler - 240V - 1 Phase

    Electro Industries EB-MX-20 - 20 kW - 68K BTU - Hot Water Electric Boiler - 240V - 1 Phase

    EB-MX-20 Electro Industries Electric Radiant Heating Staging Boiler-68,000BTU, 100% Efficient EB-MX-20 Electro Industries Electric Radiant Heating Staging Boiler-68,000BTU The new Mid-Size EB-MX Boiler has more features and is easier to install and use... more

    $1,751.97

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    Rinnai E50C - 47K BTU - 95.5% AFUE - Combi Gas Boiler - Direct Vent

    Rinnai E50C - 47K BTU - 95.5% AFUE - Combi Gas Boiler - Direct Vent

    High Efficiency Heating and Hot Water Rinnai's E series combines their high efficiency boiler technology with a space saving built-in hot water heater. With a rated 95.6% AFUE, this system is one of the most efficient on the market. The E50C can use up... more

    $1,875.00

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    110k BTU Unit Heater Outdoor Furnace Boiler , MODINE

    110k BTU Unit Heater Outdoor Furnace Boiler , MODINE

    These hanging hot water unit heaters are the most efficient, heavy duty units available! They feature heavier gauge construction, using laser cut tup quality G90 Galvanized. All units feature adjustable louvers so you can adjust the direction of air... more

    $599.00

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    Liberty 131,000 to 175,000 BTU Input 117,000 to 131,000 BTU Output Hot Water Oil Boiler with Tankless Coil, Gray

    Liberty 131,000 to 175,000 BTU Input 117,000 to 131,000 BTU Output Hot Water Oil Boiler with Tankless Coil, Gray

    Free Shipping on Over 500K Items!

    Equip your home with 117,000 to 131,000 BTUs of heating power per hour using this 3.2-Gallon Oil Boiler that is ideal for heating large spaces up to 3,000 sq. ft. Energy Star qualification and an 86% Annual Fuel Utilization Efficiency helps ensure... more

    $2,999.00

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    Condensing 95% Combination Liquid Propane Wall Mount Boiler/Water Heater with 140,000 BTU Input, Black

    Condensing 95% Combination Liquid Propane Wall Mount Boiler/Water Heater with 140,000 BTU Input, Black

    Free Shipping on Over 500K Items!

    This ultra high efficiency dual purpose boiler has an AFUE rating of 94% which provides 140,000 BTUs for space heating and comes with an optional domestic hot water capability that can provide 3.2 GPM at a 77° temperature rise. This product provides... more

    $2,400.00

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    Sentry Natural Gas Boiler with 150,000 BTU Input 110,000 Output BTU Intermittent Electronic Ignition, Blue

    Sentry Natural Gas Boiler with 150,000 BTU Input 110,000 Output BTU Intermittent Electronic Ignition, Blue

    Free Shipping on Over 500K Items!

    Sentry is a hot water boiler heating system which is ideal for a wide variety of gas boiler requirements, as a replacement or for new installations. Its advanced design provides years of trouble-free, high efficiency operation while providing easy... more

    $2,426.49

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    Slantfin Natural Gas Boiler with 90,000 BTU Input 66,000 Output BTU Intermittent Electronic Ignition, Blue

    Slantfin Natural Gas Boiler with 90,000 BTU Input 66,000 Output BTU Intermittent Electronic Ignition, Blue

    Free Shipping on Over 500K Items!

    Sentry is a hot water boiler heating system which is ideal for a wide variety of gas boiler requirements, as a replacement or for new installations. Its advanced design provides years of trouble-free, high efficiency operation while providing easy... more

    $1,632.00

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    Sentry Natural Gas Boiler with 60,000 BTU Input 44,000 Output BTU Intermittent Electronic Ignition, Blue

    Sentry Natural Gas Boiler with 60,000 BTU Input 44,000 Output BTU Intermittent Electronic Ignition, Blue

    Free Shipping on Over 500K Items!

    Sentry is a hot water boiler heating system which is ideal for a wide variety of gas boiler requirements, as a replacement or for new installations. Its advanced design provides years of trouble-free, high efficiency operation while providing easy... more

    $1,932.16

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    Sentry Natural Gas Water Boiler with 34,000 BTU Input 25,000 Output Intermittent Electronic Ignition, Blue

    Sentry Natural Gas Water Boiler with 34,000 BTU Input 25,000 Output Intermittent Electronic Ignition, Blue

    Free Shipping on Over 500K Items!

    Sentry is a hot water boiler heating system which is ideal for a wide variety of gas boiler requirements, as a replacement or for new installations. Its advanced design provides years of trouble-free, high efficiency operation while providing easy... more

    $1,850.94

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    Galaxy Natural Gas Steam Boiler with 100,000 BTU Input 61,000 BTU Output Intermittent Electronic Ignition, Black

    Galaxy Natural Gas Steam Boiler with 100,000 BTU Input 61,000 BTU Output Intermittent Electronic Ignition, Black

    Free Shipping on Over 500K Items!

    Slant/Fin's Galaxy is a hot water boiler heating system which is one of America's most trusted gas boilers. Installed in tens of thousands of homes, Galaxy is the choice of experienced heating professionals everywhere. For homeowners, it's the wise... more

    $2,732.44

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    Sentry 120,000 BTU Input, 88,000 BTU Output Intermittent Ignition Natural Gas Water Boiler, Blue

    Sentry 120,000 BTU Input, 88,000 BTU Output Intermittent Ignition Natural Gas Water Boiler, Blue

    Free Shipping on Over 500K Items!

    Provide efficient heating for your home with the Sentry Natural Gas Boiler. This boiler offers a low-profile design that is ideal for installations in low-ceiling applications. The cast iron construction of this boiler provides durable wear. Use this... more

    $2,699.00

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    210k BTU Unit Heater Outdoor Furnace Boiler - Variable Speed Fan, Brown

    210k BTU Unit Heater Outdoor Furnace Boiler - Variable Speed Fan, Brown

    These hanging hot water unit heaters are the most efficient, heavy duty units available! They feature heavier gauge construction, using laser cut tup quality G90 Galvanized. All units feature adjustable louvers so you can adjust the direction of air... more

    $919.00

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    110k BTU Unit Heater Outdoor Furnace Boiler - Variable Speed Fan, Brown

    110k BTU Unit Heater Outdoor Furnace Boiler - Variable Speed Fan, Brown

    These hanging hot water unit heaters are the most efficient, heavy duty units available! They feature heavier gauge construction, using laser cut tup quality G90 Galvanized. All units feature adjustable louvers so you can adjust the direction of air... more

    $619.00

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    47k BTU Unit Heater Outdoor Furnace Boiler - Single Speed Fan, Brown

    47k BTU Unit Heater Outdoor Furnace Boiler - Single Speed Fan, Brown

    These hanging hot water unit heaters are the most efficient, heavy duty units available! They feature heavier gauge construction, using laser cut tup quality G90 Galvanized. All units feature adjustable louvers so you can adjust the direction of air... more

    $399.00

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    159k BTU Unit Heater Outdoor Furnace Boiler - Variable Speed Fan, Brown

    159k BTU Unit Heater Outdoor Furnace Boiler - Variable Speed Fan, Brown

    These hanging hot water unit heaters are the most efficient, heavy duty units available! They feature heavier gauge construction, using laser cut tup quality G90 Galvanized. All units feature adjustable louvers so you can adjust the direction of air... more

    $829.00

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    89k BTU Unit Heater Outdoor Furnace Boiler - Variable Speed Fan, Brown

    89k BTU Unit Heater Outdoor Furnace Boiler - Variable Speed Fan, Brown

    These hanging hot water unit heaters are the most efficient, heavy duty units available! They feature heavier gauge construction, using laser cut tup quality G90 Galvanized. All units feature adjustable louvers so you can adjust the direction of air... more

    $499.00

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    RRG Series 84% Afue Gas Water Boiler with 96,000 BTU Input and 81,000 Output, Grey

    RRG Series 84% Afue Gas Water Boiler with 96,000 BTU Input and 81,000 Output, Grey

    Free Shipping on Over 500K Items!

    Rand & Reardon are efficient, cast iron, water boilers that have been trusted since 1858. Our units are extensively tested and proven. The RRG series are natural gas-fired water boilers that can be switched to propane. LP conversion kit must be... more

    $1,506.25

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    MPO-IQ Oil Cast Iron Water Boiler with 69,000 BTU, Green

    MPO-IQ Oil Cast Iron Water Boiler with 69,000 BTU, Green

    Free Shipping on Over 500K Items!

    The MPO-IQ blends unmatched performance with long lasting durability and exclusive energy saving features. Designed as an optimal replacement boiler for millions of homes with existing chimneys, the MPO-IQ has the highest average efficiency in its... more

    $2,929.72

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    RRO Series 84% Afue Oil Water Boiler with Coil and 179,000 BTU Output, Grey

    RRO Series 84% Afue Oil Water Boiler with Coil and 179,000 BTU Output, Grey

    Free Shipping on Over 500K Items!

    Rand & Reardon are efficient, cast iron, water boilers that have been trusted since 1858. Our units are extensively tested and proven. The RRO series are oil-fired water boiler that is designed for ease of service. Color: Grey. more

    $2,140.63

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    RRG Series 84% Afue Gas Water Boiler with 130,000 BTU Input and 110,000 Output, Grey

    RRG Series 84% Afue Gas Water Boiler with 130,000 BTU Input and 110,000 Output, Grey

    Free Shipping on Over 500K Items!

    Rand & Reardon are efficient, cast iron, water boilers that have been trusted since 1858. Our units are extensively tested and proven. The RRG series are natural gas-fired water boilers that can be switched to propane. LP conversion kit must be... more

    $1,740.63

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    More information about Heaters

    Best prices on Hot water boiler btu in Heaters. Check out Bizrate for great deals on popular brands like Modine and Slant Fin. Use Bizrate's latest online shopping features to compare prices. Read product specifications, calculate tax and shipping charges, sort your results, and buy with confidence. Easily narrow your search and find the product that's perfect for you.