Low NOx Tankless Water Heaters

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Learn More About Takagi TK-110U-E-N
Takagi
Takagi TK-110U - 3.9 GPM at 60° F Rise - 0.81 UEF - Gas Tankless Water Heater - Outdoor
Model: TK-110U-E-NG
7% Buy This
(25)
$675.00
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Learn More About Rinnai V65IN
Rinnai
Rinnai Value Series - V65 - 4.1 GPM at 60° F Rise - 0.81 UEF - Gas Tankless Water Heater - Concentric Vent
Model: V65IN
Ultra Low NOx Emissions (SCAQMD Rule 1146.2 Compliant). Ratings: 6.2 GPM at 40
7% Buy This
(18)
Q&A (6)
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On Sale Ends 09/30
$681.73
Was 
$757.48
SAVE $75.75
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Learn More About Noritz EZTR40-NG
Noritz
Noritz EZTR40 - 3.7 GPM at 60° F Rise - 0.89 UEF - Gas Tankless Water Heater - Direct Vent (Bundle Pack)
Model: EZTR40NG
EnergyStar Water Heater. Ultra Low NOx Emissions (SCAQMD Rule 1146.2 Compliant). Ratings: 5.5 GPM at 40
5% Buy This
(6)
$1,542.41
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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 may apply, see our full shipping policy for more details.
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Learn More About A.O. Smith ATI-540HX3-N
A.O. Smith
A.O. Smith X3 - 6.2 GPM at 60° F Rise - 0.93 UEF - Gas Tankless Water Heater - Indoor
Model: ATI-540HX3-N
EnergyStar Condensing Water Heater. Ultra-Low NOx (14 ng/J or 20 ppm). 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.
4% Buy This
(1)
$1,558.00
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Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
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Learn More About Noritz NR98-SV-LP
Noritz
Noritz NR98 - 5.6 GPM at 60° F Rise - 0.88 UEF - Propane Tankless Water Heater - Power Vent
Model: NR98-SV-LP
EnergyStar Non-Condensing Water Heater. Ultra Low Nox Emissions (SCAQMD Rule 1146.2 Compliant). Ratings: 8.4 GPM at 40
4% Buy This
(9)
$1,444.96
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Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
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Learn More About Noritz NR501-OD-NG
Noritz
Noritz NR501 - 3.3 GPM at 60° F Rise - 0.81 UEF - Gas Tankless Water Heater - Outdoor
Model: NR501OD-NG
3% Buy This
(9)
Q&A (1)
$644.48
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Learn More About Noritz NR98-DVC-NG
Noritz
Noritz NR98 - 5.6 GPM at 60° F Rise - 0.83 UEF - Gas Tankless Water Heater - Concentric Vent
Model: NR98-DVC-NG
EnergyStar Non-Condensing Water Heater. Ultra Low Nox Emissions (SCAQMD Rule 1146.2 Compliant). Ratings: 8.4 GPM at 40
3% Buy This
(9)
$1,444.96
Only 3 In-Stock
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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 may apply, see our full shipping policy for more details.
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Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
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Learn More About A.O. Smith ATO-540H-N
A.O. Smith
A.O. Smith ATO-540H - 6.3 GPM at 60° F Rise - 0.95 UEF - Gas Tankless Water Heater - Outdoor
Model: ATO-540H-N
EnergyStar Condensing Water Heater. Low NOx Emissions (< 40 ng/J or 55 PPM). 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. 189k Effective BTU/h.
3% Buy This
(1)
$1,269.00
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Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
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Learn More About Takagi TK-310U-I-N
Takagi
Takagi TK-310U - 5.3 GPM at 60° F Rise - 0.82 UEF - Gas Tankless Water Heater - Direct Vent
Model: TK-310U-I-NG
3% Buy This
(29)
$936.00
Only 2 In-Stock
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Learn More About Takagi TK-310U-E-N
Takagi
Takagi TK-310U - 5.3 GPM at 60° F Rise - 0.82 UEF - Gas Tankless Water Heater - Outdoor
Model: TK-310U-E-NG
3% Buy This
(28)
$936.00
Only 4 In-Stock
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Learn More About Noritz NR662-OD-NG
Noritz
Noritz NR662 - 3.8 GPM at 60° F Rise - 0.81 UEF - Gas Tankless Water Heater - Outdoor
Model: NR662OD-NG
EnergyStar Water Heater. Ultra Low NOx Emissions (SCAQMD Rule 1146.2 Compliant). Ratings: 5.8 GPM at 40
3% Buy This
(10)
$899.56
In-Stock
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Learn More About Takagi T-H3-OS-N
Takagi
Takagi T-H3 - 6.3 GPM at 60° F Rise - 0.95 UEF - Gas Tankless Water Heater - Outdoor
Model: T-H3-OS-NG
2% Buy This
(32)
$1,269.00
In-Stock
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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 may apply, see our full shipping policy for more details.
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Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
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Learn More About Takagi TK-110U-I-N
Takagi
Takagi TK-110U - 3.9 GPM at 60° F Rise - 0.81 UEF - Gas Tankless Water Heater - Direct Vent
Model: TK-110U-I-NG
2% Buy This
(28)
$728.00
In-Stock
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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 may apply, see our full shipping policy for more details.
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Learn More About Noritz NR98-OD-NG
Noritz
Noritz NR98 - 5.6 GPM at 60° F Rise - 0.84 UEF - Gas Tankless Water Heater - Outdoor
Model: NR98-OD-NG
2% Buy This
(9)
Q&A (2)
$1,530.00
In-Stock
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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 may apply, see our full shipping policy for more details.
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Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
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Learn More About Noritz NRC661-DV-NG
Noritz
Noritz NRC661 - 3.8 GPM at 60° F Rise - 0.89 UEF - Gas Tankless Water Heater - Direct Vent
Model: NRC661DV-NG
EnergyStar Condensing Water Heater. Ultra Low NOx Emissions (SCAQMD Rule 1146.2 Compliant). 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. 109k Effective BTU/h.
2% Buy This
(8)
$1,052.69
In-Stock
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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 may apply, see our full shipping policy for more details.
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Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
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Learn More About Noritz NR83DVC-NG
Noritz
Noritz NR83 - 5.0 GPM at 60° F Rise - 0.85 UEF - Gas Tankless Water Heater - Concentric Vent
Model: NR83DVC
EnergyStar Water Heater. Ultra Low NOx Emissions (SCAQMD Rule 1146.2 Compliant). Concentric Vent. Ratings: 7.6 GPM at 40
2% Buy This
(7)
$1,253.23
In-Stock
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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 may apply, see our full shipping policy for more details.
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Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
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Learn More About Bosch Thermotechnology T9800 SE 160
Bosch Greentherm - 5.4 GPM at 60° F Rise - 0.97 UEF - Gas Tankless Water Heater - Direct Vent
Model: T9800 SE 160
EnergyStar Condensing Water Heater. Ultra Low NOx Emissions (SCAQMD Rule 1146.2 Compliant). Ratings: 8.0 GPM at 40
2% Buy This
(3)
$1,534.00
Factory-Direct
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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 may apply, see our full shipping policy for more details.
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Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
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Learn More About A.O. Smith ATI-340H-N
A.O. Smith
A.O. Smith ATI-340H - 5.7 GPM at 60° F Rise - 0.95 UEF - Gas Tankless Water Heater - Direct Vent
Model: ATI-340H-N
EnergyStar Condensing Water Heater. Low NOx Emissions (< 40 ng/J or 55 PPM). 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. 171k Effective BTU/h.
2% Buy This
(10)
$1,142.00
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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 may apply, see our full shipping policy for more details.
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Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
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Learn More About Noritz NR98-SV-NG
Noritz
Noritz NR98 - 5.6 GPM at 60° F Rise - 0.83 UEF - Gas Tankless Water Heater - Power Vent
Model: NR98-SV-NG
EnergyStar Non-Condensing Water Heater. Ultra Low Nox Emissions (SCAQMD Rule 1146.2 Compliant). Ratings: 8.4 GPM at 40
2% Buy This
(9)
$1,444.96
In-Stock
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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 may apply, see our full shipping policy for more details.
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Learn More About 2% Check Discount
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Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
View Details
Learn More About Noritz NRC661-OD-NG
Noritz
Noritz NRC661 - 3.8 GPM at 60° F Rise - 0.89 UEF - Gas Tankless Water Heater - Outdoor
Model: NRC661OD-NG
EnergyStar Condensing Water Heater. Ultra Low NOx Emissions (SCAQMD Rule 1146.2 Compliant). 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. 109k Effective BTU/h.
2% Buy This
(9)
$1,052.69
In-Stock
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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 may apply, see our full shipping policy for more details.
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Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
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Learn More About Rinnai V53DEP
Rinnai
Rinnai Value Series - V53 - 3.3 GPM at 60° F Rise - 0.81 UEF - Propane Tankless Water Heater - Outdoor
Model: V53DEP
Low NOx Emissions (< 40 ng/J or 55 PPM). Ratings: 4.9 GPM at 40
2% Buy This
(8)
$618.19
In-Stock
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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 may apply, see our full shipping policy for more details.
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Learn More About Bosch Thermotechnology T9900 SE 199
Bosch T9900 SE 199 - 6.8 GPM at 60° F Rise - 0.96 UEF - Gas Tankless Water Heater - Direct Vent
Model: T9900 SE 199
2% Buy This
(8)
$2,120.00
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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 may apply, see our full shipping policy for more details.
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Learn More About 2% Check Discount
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Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
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Learn More About Noritz NR98-DVC-LP
Noritz
Noritz NR98 - 5.6 GPM at 60° F Rise - 0.88 UEF - Propane Tankless Water Heater - Concentric Vent
Model: NR98-DVC-LP
2% Buy This
(7)
$1,444.96
Factory-Direct
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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 may apply, see our full shipping policy for more details.
2% Check Discount Icon
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Learn More About 2% Check Discount
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Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
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Learn More About Takagi TK-540X3-NIH
Takagi
Takagi X3 - 6.2 GPM at 60° F Rise - 0.93 UEF - Gas Tankless Water Heater - Indoor
Model: TK-540X3-NIH
EnergyStar Condensing Water Heater. Ultra-Low NOx (14 ng/J or 20 ppm). 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.
2% Buy This
(1)
$1,558.00
In-Stock
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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 may apply, see our full shipping policy for more details.
2% Check Discount Icon
2% Check Discount
Learn More About 2% Check Discount
2% Check Discount
Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
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