Residential Tankless Hot Water Heaters

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Application
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Fuel Type Learn More
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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Vent Type Learn More
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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Voltage (Volts)
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Installation Location
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Flow Rate at 40F Temperature Rise (GPM) Learn More
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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Flow Rate at 50F Temperature Rise (GPM) Learn More
Flow Rate at 50F 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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Flow Rate at 60F Temperature Rise (GPM) Learn More
Flow Rate at 60F 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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Flow Rate at 70F Temperature Rise (GPM) Learn More
Flow Rate at 70F 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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Product Height (Inches)
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Product Width (Inches)
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Includes Pump
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Maximum Input Capacity (BTU) Learn More
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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EnergyStar Condensing Water Heater. Ultra-Low NOx Emissions. Ratings: 8.5 GPM at 40° F Rise, 6.8 GPM at 50° F Rise, 5.8 GPM at 60° F Rise, 4.9 GPM at 70° F Rise. 180k BTU/h.
Item#: 154115
Model#: ATHR-180X3
Brand: A.O. Smith
$1,800.70
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*This product qualifies for Free Lift Gate Service. Items over 100lbs normally ship via semi-truck. Select this service if you need the product lowered to the ground curbside. To learn more about Lift Gate Service, read our shipping policy.
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EnergyStar Condensing Water Heater. Ultra Low NOx Emissions. Ratings: 5.8 GPM at 40° F Rise, 4.6 GPM at 50° F Rise, 3.8 GPM at 60° F Rise, 3.3 GPM at 70° F Rise. 112k Effective BTU/h.
Item#: 31851
Model#: NRC661OD-LP
Brand: Noritz
$1,051.68
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EnergyStar Water Heater. Ultra Low NOx Emissions. Ratings: 8.3 GPM at 40° F Rise, 6.9 GPM at 50° F Rise, 5.5 GPM at 60° F Rise, 4.8 GPM at 70° F Rise. 199k Max BTU/h.
Item#: 69986
Model#: ATI-510U-N
Brand: A.O. Smith
$1,642.87
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EnergyStar Condensing Water Heater. Ultra-Low NOx Emissions. Ratings: 8.0 GPM at 40° F Rise, 6.8 GPM at 50° F Rise, 5.7 GPM at 60° F Rise, 4.8 GPM at 70° F Rise. 180k Effective BTU/h.
Item#: 70558
Model#: T-H3S-DV-P
Brand: Takagi
$1,187.95
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EnergyStar Condensing Water Heater. Ultra Low NOx Emissions. Ratings: 8.0 GPM at 40° F Rise.
Item#: 73648
Model#: T9800 SE 160
Brand: Bosch Thermotechnology
$1,680.00
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EnergyStar Condensing Water Heater. Ultra-Low NOx. Ratings: 9.5 GPM at 40° F Rise, 7.5 GPM at 50° F Rise, 6.2 GPM at 60° F Rise, 5.2 GPM at 70° F Rise. 199k Max BTU/h.
Item#: 123211
Model#: ATI-540HX3-P
Brand: A.O. Smith
$1,726.70
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*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges map apply, see our full shipping policy for more details.
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EnergyStar Condensing Water Heater. Ultra Low NOx Emissions. Ratings: 5.8 GPM at 40° F Rise, 4.6 GPM at 50° F Rise, 3.8 GPM at 60° F Rise, 3.3 GPM at 70° F Rise. 112k Effective BTU/h.
Item#: 31850
Model#: NRC661DV-LP
Brand: Noritz
$1,051.68
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EnergyStar Water Heater. Ultra Low NOx Emissions. Ratings: 5.8 GPM at 40° F Rise, 4.6 GPM at 50° F Rise, 3.8 GPM at 60° F Rise, 3.3 GPM at 70° F Rise. 122k Effective BTU/h.
Item#: 32017
Model#: NR662OD-LP
Brand: Noritz
$899.56
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EnergyStar Condensing Water Heater. Ultra-Low NOx. Ratings: 9.5 GPM at 40° F Rise, 7.5 GPM at 50° F Rise, 6.3 GPM at 60° F Rise, 5.4 GPM at 70° F Rise. 199k Max BTU/h.
Item#: 61568
Model#: ATI-540H-P
Brand: A.O. Smith
$1,432.30
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Factory-Direct
EnergyStar Condensing Water Heater. Low NOx Emissions. Ratings: 6.7 GPM at 40° F Rise, 6.1 GPM at 50° F Rise, 5.0 GPM at 60° F Rise, 4.3 GPM at 70° F Rise. 171k Effective BTU/h.
Item#: 69993
Model#: ATO-240H-N
Brand: A.O. Smith
$1,109.00
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EnergyStar Condensing Water Heater. Ultra Low NOx Emissions. Ratings: 8.6 GPM at 40° F Rise, 6.9 GPM at 50° F Rise, 5.7 GPM at 60° F Rise, 4.9 GPM at 70° F Rise. 180k Effective BTU/h.
Item#: 82334
Model#: EZ98DV-LP
Brand: Noritz
$1,638.79
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Free Lift Gate
*This product qualifies for Free Lift Gate Service. Items over 100lbs normally ship via semi-truck. Select this service if you need the product lowered to the ground curbside. To learn more about Lift Gate Service, read our shipping policy.
Factory-Direct
EnergyStar Condensing Water Heater. Ultra Low NOx Emissions. Ratings: 9.8 GPM at 40° F Rise, 7.8 GPM at 50° F Rise, 6.5 GPM at 60° F Rise, 5.6 GPM at 70° F Rise. 199.9k Effective BTU/h.
Item#: 82335
Brand: Noritz
$2,363.65
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Free Lift Gate
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Free Lift Gate
*This product qualifies for Free Lift Gate Service. Items over 100lbs normally ship via semi-truck. Select this service if you need the product lowered to the ground curbside. To learn more about Lift Gate Service, read our shipping policy.
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EnergyStar Water Heater. Ultra Low NOx Emissions. Concentric Vent. Ratings: 8.4 GPM at 40° F Rise, 6.7 GPM at 50° F Rise, 5.6 GPM at 60° F Rise, 4.8 GPM at 70° F Rise. 199.9k Effective BTU/h.
Item#: 82340
Model#: BNR98DVC-NG
Brand: Noritz
$1,551.67
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Wall Mounted, Condensing Water Heater Ultra Low NOx Emissions Concentric Vent. Ratings: 7.4 GPM at 40° F Rise, 5.9 GPM at 50° F Rise, 4.9 GPM at 60° F Rise, 4.2 GPM at 70° F Rise. 160k Effective BTU/h.
Item#: 92628
Model#: RUS75EN
Brand: Rinnai
$1,079.10
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Wall Mounted, Non-Condensing Water Heater Low NOx Emissions. Ratings: 4.9 GPM at 40° F Rise, 3.9 GPM at 50° F Rise, 3.3 GPM at 60° F Rise, 2.8 GPM at 70° F Rise. 120k Effective BTU/h.
Item#: 95819
Model#: V53DEN
Brand: Rinnai
$669.50
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EnergyStar Condensing Water Heater. Ultra-Low NOx. Ratings: 9.5 GPM at 40° F Rise, 7.5 GPM at 50° F Rise, 6.2 GPM at 60° F Rise, 5.2 GPM at 70° F Rise. 199k Max BTU/h.
Item#: 123210
Model#: ATI-540HX3-N
Brand: A.O. Smith
$1,726.70
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EnergyStar Condensing Water Heater. Ultra-Low NOx. Ratings: 6.7 GPM at 40° F Rise, 6.1 GPM at 50° F Rise, 5.1 GPM at 60° F Rise, 4.3 GPM at 70° F Rise. 160k Max BTU/h.
Item#: 123212
Model#: TK-240X3-NEH
Brand: Takagi
$1,399.00
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EnergyStar Condensing Water Heater. Ultra-Low NOx. Ratings: 6.7 GPM at 40° F Rise, 6.1 GPM at 50° F Rise, 5.1 GPM at 60° F Rise, 4.3 GPM at 70° F Rise. 160k Max BTU/h.
Item#: 123213
Model#: TK-240X3-NIH
Brand: Takagi
$1,399.00
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EnergyStar Condensing Water Heater. Ultra-Low NOx. Ratings: 8 GPM at 40° F Rise, 6.8 GPM at 50° F Rise, 5.8 GPM at 60° F Rise, 4.9 GPM at 70° F Rise. 180k Max BTU/h.
Item#: 123233
Brand: State Water Heaters
$1,421.00
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Wall Mounted, Non-Condensing Boiler Water Heater Ultra Low NOx Emissions Ratings: 5.3 GPM at 40° F Rise, 4.6 GPM at 50° F Rise, 3.8 GPM at 60° F Rise, 3.3 GPM at 70° F Rise. 140k Effective BTU/h
Item#: 124517
Model#: RE140IN
Brand: Rinnai
$830.20
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Wall Mounted, Non-Condensing Boiler Water Heater Ultra Low NOx Emissions Ratings: 7.4 GPM at 40° F Rise, 6.0 GPM at 50° F Rise, 5.0 GPM at 60° F Rise, 4.3 GPM at 70° F Rise. 180k Effective BTU/h
Item#: 124525
Model#: RE180IP
Brand: Rinnai
$1,138.20
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Wall Mounted, Non-Condensing Boiler Water Heater Ultra Low NOx Emissions Ratings: 8.2 GPM at 40° F Rise, 6.6 GPM at 50° F Rise, 5.5 GPM at 60° F Rise, 4.6 GPM at 70° F Rise. 199k Effective BTU/h
Item#: 132520
Model#: RE199IN
Brand: Rinnai
$1,336.30
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$1,188.00
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Wall Mounted Non-Condensing Boiler Water Heater Ultra Low NOx Emissions Ratings: 7.5 GPM at 40° F Rise, 6.0 GPM at 50° F Rise, 5.0 GPM at 60° F Rise, 4.3 GPM at 70° F Rise. 157k Effective BTU/h
Item#: 153638
Model#: RECTGH-S10IN
Brand: Rheem Tankless
$1,532.00
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