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Bosch Thermotechnology (8)
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Maximum Input Capacity (BTU)
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Maximum Input Capacity (BTU)
The Maximum Input Capacity describes how quickly the appliance will use fuel when delivering it's maximum capacity. The units may change depending on the fuel being used.
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70000 - 99999 (1)
100000 - 129999 (22)
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160000 - 189999 (49)
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280000 - 309999 (5)
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Energy Factor
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Energy Factor
Energy Factor (EF) is a measurement of water heater energy efficiency. The higher the energy factor, the more efficient the water heater.
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0.95 (7)
0.99 (2)
3.06 (1)
3.17 (1)
AFUE (%)
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AFUE (%)
AFUE (Annual Fuel Utilization Efficiency) measures the efficiency of combustion equipment over the entire heating season, and is calculated by dividing the amount of energy that is actually heating your home by the total energy contained in the fuel used by the boiler/furnace.
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84 (2)
88 (2)
97 (1)
98 (8)
Vent Type
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Vent Type
Products that use combustion (burning) of fuel to create heat also create potentially dangerous gasses that need to be exhausted (AKA "Vented"). Depending on the product, venting can be done via a chimney, through a side wall, or use a second vent to provide fresh air to the appliance.
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Concentric Vent (20)
Direct Vent (89)
Outdoor (No Venting) (63)
Power Vent (4)
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Fuel Type
To create heat, some form of fuel is required. Fuel Type specifies what the product uses as an input to create heat.
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Electric (71)
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Flow Rate at 40F Temperature Rise (GPM)
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Flow Rate at 40F Temperature Rise (GPM)
Flow rate measures how much hot water your heater can deliver. Click Learn More to determine the appropriate temperature rise to use based on your location.
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0 (29)
1 (18)
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3 (1)
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8 (43)
9 (52)
10 (2)
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Product Status
Discontinued (87)
Available (301)
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Webstone Isolator - 3/4" Threaded - Isolator Valve Kit w/ 150 PSI Pressure Relief Valve - Lead Free Including PRV
Model: 44443WPR-LF
(6)
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$115.00
Free Shipping
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Webstone Isolator - 3/4" Sweat - Isolation Valve kit w/ 150 PSI Relief Valve - Lead Free Including PRV
Model: 54443WPR-LF
(5)
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$155.00
Free Shipping
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Webstone Isolator - 3/4" Press - Isolator Valve Kit w/ 150 PSI Pressure Relief Valve - Lead Free Including PRV
Model: 84443WPR-LF
(5)
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$129.00
Free Shipping
In-Stock
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Takagi T-H3 - Commercial/Residential 199,000 BTU - Liquid Propane Tankless Water Heater - Indoor
Model: T-H3-DV-P
(41)
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2% Check Discount
$1,210.95
Free Freight
Factory-Direct!
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Takagi T-H3M - Residential 120,000 BTU - Liquid Propane Tankless Water Heater - Indoor
Model: T-H3M-DV-P
(37)
Q&A
(1)
$800.95
Free Shipping
Factory-Direct!
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Takagi T-H3 - Residential 199,000 BTU - Natural Gas Tankless Water Heater - Outdoor
Model: T-H3-OS-N
(32)
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2% Check Discount
$1,185.95
Free Shipping
In-Stock
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Takagi T-H3 - Residential 199,000 BTU - Liquid Propane Tankless Water Heater - Outdoor
Model: T-H3-OS-P
(31)
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2% Check Discount
$1,195.95
Free Shipping
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Takagi TK-310U - Commercial/Residential 190,000 BTU - Natural Gas Tankless Water Heater - Indoor
Model: TK-310U-I-N
(29)
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$910.95
Free Shipping
Only 5 In-Stock
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Takagi TK-110U - Residential 140,000 BTU - Natural Gas Tankless Water Heater - Indoor
Model: TK-110U-I-N
(28)
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$695.95
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Takagi TK-310U - Commercial/Residential 190,000 BTU - Natural Gas Tankless Water Heater - Outdoor
Model: TK-310U-E-N
(28)
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$885.95
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In-Stock
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Takagi TK-510U - Commercial/Residential 199,000 BTU - Natural Gas Tankless Water Heater - Indoor
Model: TK-510U-I-N
(28)
Q&A
(1)
2% Check Discount
$1,055.95
Free Shipping
Factory-Direct!
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Takagi T-H3S - Commercial/Residential 180,000 BTU - Natural Gas Tankless Water Heater - Outdoor
Model: T-H3S-OS-N
(27)
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2% Check Discount
$1,421.00
Free Freight
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Takagi TK-540P-PIH - Residential 199,000 BTU - Liquid Propane Tankless Water Heater - Indoor
Model: TK-540P-PIH
(27)
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2% Check Discount
$1,415.95
Free Shipping
Factory-Direct!
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Takagi T-H3S - Residential 180,000 BTU - Liquid Propane Tankless Water Heater - Outdoor
Model: T-H3S-OS-P
(26)
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2% Check Discount
$1,090.95
Free Shipping
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Takagi TK-110U - Residential 140,000 BTU - Natural Gas Tankless Water Heater - Outdoor
Model: TK-110U-E-N
(25)
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$640.95
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In-Stock
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Takagi TK-510U - Commercial/Residential 199,000 BTU - Natural Gas Tankless Water Heater - Outdoor
Model: TK-510U-E-N
(25)
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2% Check Discount
$1,085.95
Free Shipping
Only 3 In-Stock
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Takagi TK-540P-PEH - Residential 199,000 BTU - Liquid Propane Tankless Water Heater - Outdoor
Model: TK-540P-PEH
(25)
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2% Check Discount
$1,415.95
Free Shipping
Factory-Direct!
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Takagi T-H3J - Residential 160,000 BTU - Liquid Propane Tankless Water Heater - Outdoor
Model: T-H3J-OS-P
(25)
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$965.95
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A.O. Smith ATI-540H - Residential 199,000 BTU - Natural Gas Tankless Water Heater - Indoor
Model: ATI-540H-N
(14)
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2% Check Discount
$1,269.00
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In-Stock
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A.O. Smith HPTU-50N - 50 Gallon Capacity - Residential Hybrid Electric Heat Pump Water Heater
Model: HPTU-50N
(13)
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2% Check Discount
$1,793.00
Free Freight
Free Lift Gate
In-Stock
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Noritz NR662 - Residential 140,000 BTU - Natural Gas Tankless Water Heater - Outdoor
Model: NR662-OD-NG
(10)
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Offer Ends Saturday, December 21
$899.56
$809.60
Free Shipping
Only 1 In-Stock
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Noritz NR98 - Residential 199,900 BTU - Natural Gas Tankless Water Heater - Power Vent
Model: NR98-SV-NG
(10)
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Offer Ends Saturday, December 21
2% Check Discount
$1,444.96
$1,300.46
Free Shipping
In-Stock
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Triangle Tube Smart 120 - 119 Gallon - Residential Indirect Water Heater
Model: SMART 120
(10)
Q&A
(1)
Offer Ends Tuesday, December 31
2% Check Discount
$3,147.00
$3,100.00
Free Freight
Free Lift Gate
Only 1 In-Stock
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Triangle Tube Smart 50 - 46 Gallon - Residential Indirect Water Heater
Model: SMART 50
(10)
Q&As
(3)
Offer Ends Tuesday, December 31
2% Check Discount
$1,345.00
$1,289.00
Free Freight
Free Lift Gate
In-Stock
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