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Whole House Tankless Water Heaters

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Model Number TK-310U-I-N is the Number 1 Seller
Learn More About 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
Ultra Low NOx Emissions (SCAQMD Rule 1146.2 Compliant). Ratings: 7.9 GPM at 40° F Rise, 6.2 GPM at 50° F Rise, 5.3 GPM at 60° F Rise, 4.5 GPM at 70° F Rise. 156k Effective BTU/h.
7% Buy This
4.9 out of 54.9 out of 54.9 out of 54.9 out of 54.9 out of 5(17)
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On Sale Ends 12/31
$657.00
Was 
$730.00
SAVE $73.00
In-Stock
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Model Number T-H3M-DV-N is the Number 2 Seller
Learn More About T-H3M-DV-N
Takagi
Takagi T-H3M - 3.8 GPM at 60° F Rise - 0.90 UEF - Gas Tankless Water Heater - Direct Vent
Model: T-H3M-DV-NG
EnergyStar Condensing Water Heater. Low NOx Emissions (< 40 ng/J or 55 PPM). Ratings: 5.4 GPM at 40° F Rise, 4.4 GPM at 50° F Rise, 3.8 GPM at 60° F Rise, 3.2 GPM at 70° F Rise. 112k Effective BTU/h.
6% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(30)
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On Sale Ends 12/31
$621.00
Was 
$690.00
SAVE $69.00
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Model Number T-H3-DV-N is the Number 3 Seller
Learn More About T-H3-DV-N
Takagi
Takagi T-H3 - 6.3 GPM at 60° F Rise - 0.93 UEF - Gas Tankless Water Heater - Direct Vent
Model: T-H3-DV-NG
6% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(28)
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On Sale Ends 12/31
$927.00
Was 
$1,030.00
SAVE $103.00
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Model Number T-H3M-DV-P is the Number 4 Seller
Learn More About T-H3M-DV-P
Takagi
Takagi T-H3M - 3.8 GPM at 60° F Rise - 0.90 UEF - Propane Tankless Water Heater - Direct Vent
Model: T-H3M-DV-LP
6% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(23)
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On Sale Ends 12/31
$621.00
Was 
$690.00
SAVE $69.00
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Model Number T-H3-DV-P is the Number 5 Seller
Learn More About T-H3-DV-P
Takagi
Takagi T-H3 - 6.3 GPM at 60° F Rise - 0.93 UEF - Propane Tankless Water Heater - Direct Vent
Model: T-H3-DV-LP
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.
5% Buy This
4.9 out of 54.9 out of 54.9 out of 54.9 out of 54.9 out of 5(28)
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On Sale Ends 12/31
$944.10
Was 
$1,049.00
SAVE $104.90
Only 4 In-Stock
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Learn More About 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
Ultra Low NOx Emissions (SCAQMD Rule 1146.2 Compliant). Ratings: 7.9 GPM at 40° F Rise, 6.2 GPM at 50° F Rise, 5.3 GPM at 60° F Rise, 4.5 GPM at 70° F Rise. 156k Effective BTU/h.
3% Buy This
4.9 out of 54.9 out of 54.9 out of 54.9 out of 54.9 out of 5(15)
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View All Whole House Tankless Water Heaters on Sale
On Sale Ends 12/31
$657.00
Was 
$730.00
SAVE $73.00
In-Stock
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Learn More About T-H3S-DV-N
Takagi
Takagi T-H3S - 5.7 GPM at 60° F Rise - 0.95 UEF - Gas Tankless Water Heater - Direct Vent
Model: T-H3S-DV-NG
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.
3% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(23)
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View All Whole House Tankless Water Heaters on Sale
On Sale Ends 12/31
$837.00
Was 
$930.00
SAVE $93.00
Only 5 In-Stock
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Learn More About V65IP
Rinnai
Rinnai Value Series - V65 - 4.1 GPM at 60° F Rise - 0.81 UEF - Propane Tankless Water Heater - Direct Vent
Model: V65IP
EnergyStar Water Heater. Ultra Low NOx Emissions (SCAQMD Rule 1146.2 Compliant). Ratings: 6.2 GPM at 40
2% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(14)
Q&A (6)
$624.00
Was 
$1,101.00
SAVE $477.00
In-Stock
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Learn More About T-H3J-DV-P
Takagi
Takagi T-H3J - 5.0 GPM at 60° F Rise - 0.94 UEF - Propane Tankless Water Heater - Direct Vent
Model: T-H3J-DV-LP
EnergyStar Condensing Water Heater. Low NOx Emissions (< 40 ng/J or 55 PPM). 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. 152k Effective BTU/h.
2% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(26)
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On Sale Ends 12/31
$751.50
Was 
$835.00
SAVE $83.50
Only 3 In-Stock
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Learn More About V65IN
Rinnai
Rinnai Value Series - V65 - 4.1 GPM at 60° F Rise - 0.81 UEF - Gas Tankless Water Heater - Direct Vent
Model: V65IN
EnergyStar Water Heater. Ultra Low NOx Emissions (SCAQMD Rule 1146.2 Compliant). Ratings: 6.2 GPM at 40
2% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(14)
Q&A (6)
$624.00
Was 
$1,101.00
SAVE $477.00
In-Stock
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Learn More About 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
Ultra Low NOx Emissions (SCAQMD Rule 1146.2 Compliant). Ratings: 5.8 GPM at 40° F Rise, 4.5 GPM at 50° F Rise, 3.9 GPM at 60° F Rise, 3.3 GPM at 70° F Rise. 115k Effective BTU/h.
2% Buy This
4.8 out of 54.8 out of 54.8 out of 54.8 out of 54.8 out of 5(17)
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On Sale Ends 12/31
$544.50
Was 
$605.00
SAVE $60.50
In-Stock
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Learn More About NR98-SV-NG
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
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(6)
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$1,299.00
In-Stock
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Learn More About TK-540P-NIH
Takagi
Takagi TK-540P-NIH - 6.3 GPM at 60° F Rise - 0.93 UEF - Gas Tankless Water Heater - Direct Vent
Model: TK-540P-NIH
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. 199k Effective BTU/h.
2% Buy This
4.7 out of 54.7 out of 54.7 out of 54.7 out of 54.7 out of 5(18)
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On Sale Ends 12/31
$1,143.00
Was 
$1,270.00
SAVE $127.00
In-Stock
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2% Check Discount Icon
2% Check Discount
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Learn More About T-H3M-OS-N
Takagi
Takagi T-H3M - 3.8 GPM at 60° F Rise - 0.91 UEF - Gas Tankless Water Heater - Outdoor
Model: T-H3M-OS-NG
EnergyStar Condensing Water Heater. Low NOx Emissions (< 40 ng/J or 55 PPM). Ratings: 5.4 GPM at 40
1% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(22)
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View All Whole House Tankless Water Heaters on Sale
On Sale Ends 12/31
$648.00
Was 
$720.00
SAVE $72.00
Only 4 In-Stock
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Learn More About 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
1% Buy This
4.9 out of 54.9 out of 54.9 out of 54.9 out of 54.9 out of 5(15)
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View All Whole House Tankless Water Heaters on Sale
On Sale Ends 12/31
$544.50
Was 
$605.00
SAVE $60.50
In-Stock
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Learn More About Free Freight *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 T-H3J-DV-N
Takagi
Takagi T-H3J - 5.0 GPM at 60° F Rise - 0.94 UEF - Gas Tankless Water Heater - Direct Vent
Model: T-H3J-DV-NG
EnergyStar Condensing Water Heater. Low NOx Emissions (< 40 ng/J or 55 PPM). Ratings: 6.7 GPM at 40
1% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(28)
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View All Whole House Tankless Water Heaters on Sale
On Sale Ends 12/31
$751.50
Was 
$835.00
SAVE $83.50
In-Stock
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Learn More About V65EP
Rinnai
Rinnai Value Series - V65 - 4.1 GPM at 60° F Rise - 0.81 UEF - Propane Tankless Water Heater - Outdoor
Model: V65EP
EnergyStar Water Heater. Ultra Low NOx Emissions (SCAQMD Rule 1146.2 Compliant). Ratings: 6.2 GPM at 40
1% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(11)
Q&A (3)
$605.00
Was 
$1,023.00
SAVE $418.00
In-Stock
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Learn More About T9800 SE 199
Bosch Greentherm - 6.7 GPM at 60° F Rise - 0.96 UEF - Gas Tankless Water Heater - Direct Vent
Model: T9800 SE 199
EnergyStar Condensing Water Heater. Ultra Low NOx Emissions (SCAQMD Rule 1146.2 Compliant). Ratings: 10.0 GPM at 40
1% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(2)
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$1,219.00
Factory-Direct
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2% Check Discount
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Learn More About TK-510U-I-N
Takagi
Takagi TK-510U - 5.5 GPM at 60° F Rise - 0.82 UEF - Gas Tankless Water Heater - Direct Vent
Model: TK-510U-I-NG
Ultra Low NOx Emissions (SCAQMD Rule 1146.2 Compliant). 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. 163k Effective BTU/h.
1% Buy This
4.9 out of 54.9 out of 54.9 out of 54.9 out of 54.9 out of 5(17)
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On Sale Ends 12/31
$814.50
Was 
$905.00
SAVE $90.50
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Learn More About RL94IN
Rinnai
Rinnai Luxury Series - RL94 - 5.5 GPM at 60° F Rise - 0.81 UEF - Gas Tankless Water Heater - Direct Vent
Model: RL94IN
EnergyStar Water Heater. Low NOx Emissions (< 40 ng/J or 55 PPM). Ratings: 8.2 GPM at 40° F Rise, 6.5 GPM at 50° F Rise, 5.5 GPM at 60° F Rise, 4.7 GPM at 70° F Rise. 163k Effective BTU/h.
1% Buy This
4.6 out of 54.6 out of 54.6 out of 54.6 out of 54.6 out of 5(8)
Q&A (1)
Model RL94IN includes Additional $100 Off w/ Mail-In Rebate
Additional $100 Off w/ Mail-In Rebate
$1,371.00
In-Stock
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Learn More About RL94EN
Rinnai
Rinnai Luxury Series - RL94 - 5.5 GPM at 60° F Rise - 0.81 UEF - Gas Tankless Water Heater - Outdoor
Model: RL94EN
1% Buy This
4.6 out of 54.6 out of 54.6 out of 54.6 out of 54.6 out of 5(8)
Q&A (1)
Model RL94EN includes Additional $100 Off w/ Mail-In Rebate
Additional $100 Off w/ Mail-In Rebate
$1,371.00
In-Stock
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2% Check Discount
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Learn More About NC380-SV-ASME-NG
Noritz NC380-SV-ASME - 8.9 GPM at 70° F Rise - 80% TE - Gas Tankless Water Heater - Power Vent or Outdoor - ASME Certified
Model: NC380-SV-ASME-NG
Commercial Water Heater. Low NOx Emissions (< 40 ng/J or 55 PPM). Ratings: GPM at 40° F Rise, GPM at 50° F Rise, GPM at 60° F Rise, 8.9 GPM at 70° F Rise. 304k Effective BTU/h.
1% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(2)
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$3,615.00
Only 5 In-Stock
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2% Check Discount
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Learn More About NR501-OD-NG
Noritz NR501 - 3.3 GPM at 60° F Rise - 0.81 UEF - Gas Tankless Water Heater - Outdoor
Model: NR501OD-NG
EnergyStar Water Heater. Ultra Low NOx Emissions (SCAQMD Rule 1146.2 Compliant). Ratings: 5.0 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. 103k Effective BTU/h.
1% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(8)
Q&A (1)
$559.00
Only 2 In-Stock
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Learn More About T-H3S-DV-P
Takagi
Takagi T-H3S - 5.7 GPM at 60° F Rise - 0.95 UEF - Propane Tankless Water Heater - Direct Vent
Model: T-H3S-DV-LP
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.
1% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(21)
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View All Whole House Tankless Water Heaters on Sale
On Sale Ends 12/31
$837.00
Was 
$930.00
SAVE $93.00
Factory-Direct
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