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AO Smith (31)
Bosch (4)
Bradford White (9)
Eccotemp (6)
EZ Tankless (7)
Noritz (24)
Rheem (13)
Rinnai (24)
Takagi (19)

Fuel Type

Natural Gas (132)
Propane (27)

BTU (Max)

70,000 (1)
80,000 (3)
84,000 (1)
100,000 (1)
120,000 (7)
130,000 (2)
140,000 (12)
157,000 (3)
160,000 (18)
165,000 (1)

Energy Factor

0.80 - 0.85 (40)
0.85 - 0.90 (5)
0.90 - 0.95 (53)
0.95+ (49)

Vent Type

Concentric (17)
Concentric Direct-Vent Termination (3)
Direct Exhaust (3)
Direct Vent (65)
Outdoor (No Venting) (19)
Power Direct Vent (6)
Power Vent (11)

Installation Type

Indoor Only (71)
Indoor/Outdoor (20)
Outdoor Only (42)

Flow Rate At 40F Temp Rise (GPM)

4.9 (1)
5.0 (1)
5.4 (2)
5.5 (1)
5.8 (5)
6 (1)
6.3 (1)
6.6 (2)
6.7 (2)
7.1 (2)

Flow Rate At 50F Temp Rise (GPM)

3.9 (2)
4.4 (3)
4.5 (2)
4.6 (3)
4.8 (1)
5.1 (1)
5.3 (2)
5.8 (2)
6.1 (3)
6.2 (6)

Flow Rate At 60F Temp Rise (GPM)

3.3 (2)
3.7 (1)
3.8 (5)
3.9 (2)
4 (1)
4.2 (1)
4.4 (2)
4.9 (2)
5 (3)
5.2 (2)

Flow Rate At 70F Temp Rise (GPM)

2.8 (2)
3.2 (3)
3.3 (5)
3.5 (1)
3.6 (1)
3.8 (3)
4.2 (2)
4.3 (2)
4.4 (1)
4.5 (5)

Review Score

(39)
(8)
(1)
(1)

Price Range

$40 to $45 (1)
$300 to $400 (1)
$400 to $500 (2)
$500 to $600 (5)
$600 to $700 (4)
$700 to $800 (5)
$800 to $900 (6)
$900 to $1000 (13)
$1000 to $1500 (31)
$1500 to $2000 (40)

Tankless Natural Gas Water Heaters

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Product Image of 199,000 BTU ATM-199M Adapt SC Standard Condensing Ultra-Low NOx Tankless Water Heater (NG)
$1,656.25 each
In Stock
Get 32 by Wed, Jun 17 - Fri, Jun 19
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Product Image of Series 200 Ultra Low-NOx Non-Condensing Indoor Tankless Water Heater (6.6 GPM, NG/LP)
$776.07 each
In Stock
Get 62 by Wed, Jun 17
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Product Image of RX199IN 199,000 BTU, Condensing Indoor/Outdoor Tankless Water Heater (Natural Gas or Propane)
$1,532.79 each
In Stock
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Product Image of Series 200 Ultra Low-NOx Non-Condensing Indoor Tankless Water Heater (8 GPM, NG/LP)
$669.00 each
In Stock
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Product Image of CX199IN 199,000 BTU, Commercial Condensing Indoor Tankless Water Heater (NG/LP)
$1,577.52 each
In Stock
Get 40 by Wed, Jun 17
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Product Image of Series 200 Ultra Low-NOx Non-Condensing Indoor Tankless Water Heater (10 GPM, NG/LP)
$973.19 each
In Stock
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Product Image of RXP199IN 199,000 BTU Condensing Indoor/Outdoor Tankless Water Heater w/ Pump & Thermal Bypass Valve (Natural Gas)
$1,861.02 each
In Stock
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Product Image of NR98SV 199,900 BTU Indoor Single Vent Residential Tankless Water Heater (NG)
$1,565.64 each
In Stock
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Product Image of Series 200 Ultra Low-NOx Non-Condensing Outdoor Tankless Water Heater (8 GPM, NG/LP)
$595.04 each
Out of Stock
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Product Image of RE199i 199,000 BTU, Non-Condensing Indoor Tankless Water Heater (Natural Gas)
$1,423.10 each
In Stock
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Product Image of Series 200 Ultra Low-NOx Non-Condensing Outdoor Tankless Water Heater (6.6 GPM, NG/LP)
$793.87 each
In Stock
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Product Image of RE180i 180,000 BTU, Non-Condensing Indoor Tankless Water Heater (Natural Gas)
$1,212.40 each
In Stock
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Product Image of RE199e 199,000 BTU, Non-Condensing Outdoor Tankless Water Heater (Natural Gas)
$1,423.10 each
In Stock
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Product Image of RE160i 160,000 BTU, Non-Condensing Indoor Tankless Water Heater (Propane)
$992.60 each
In Stock
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Product Image of RE140i 140,000 BTU, Non-Condensing Indoor Tankless Water Heater (Propane)
$884.10 each
In Stock
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Product Image of NRC111DV 199,900 BTU Direct Vent Residential Tankless Water Heater (NG)
$1,908.12 each
In Stock
Get 13 by Wed, Jun 17
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Product Image of NR98OD 199,900 BTU Outdoor Vent Residential Tankless Water Heater (NG)
$1,527.34 each
In Stock
Get 10 by Wed, Jun 17
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Product Image of RTGH Super High Efficiency 9.5 GPM Indoor Condensing Tankless Water Heater (Natural Gas), RTGH-95DVLN-3
$1,201.56 each
In Stock
Get 6 by Thu, Jun 18
In Stock
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Product Image of RX160IN 160,000 BTU, Condensing Indoor/Outdoor Tankless Water Heater (Natural Gas)
$1,298.43 each
In Stock
Get 9 by Wed, Jun 17
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Product Image of RX130IN 130,000 BTU, Condensing Indoor/Outdoor Tankless Water Heater (Natural Gas)
$1,137.78 each
In Stock
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Product Image of NRC98DV 180,000 BTU Direct Vent Residential Tankless Water Heater (NG)
$1,733.78 each
In Stock
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Product Image of RE160i 160,000 BTU, Non-Condensing Indoor Tankless Water Heater (Natural Gas)
$992.60 each
In Stock
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Product Image of RX180IN 180,000 BTU, Condensing Indoor/Outdoor Tankless Water Heater (Natural Gas)
$1,409.94 each
In Stock
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Product Image of NR501 120,000 BTU Outdoor Residential Tankless Water Heater (NG)
$736.87 each
In Stock
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Product Image of NR98DVC 199,900 BTU Indoor Concentric Residential Tankless Water Heater (NG)
$1,649.09 each
In Stock
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Product Image of NRC661 120,000 BTU Direct Vent Condensing Residential Tankless Water Heater (NG)
$1,126.22 each
In Stock
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Product Image of 140,000 BTU ATI-110 Non-Condensing Ultra-Low NOx Indoor Tankless Water Heater (NG/LP)
$929.89 each
In Stock
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In Stock
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Product Image of RXP160IN 160,000 BTU Condensing Indoor/Outdoor Tankless Water Heater w/ Pump (Natural Gas)
$1,517.04 each
In Stock
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In Stock
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Product Image of NC380 380,000 BTU Single Vent Commercial Tankless Water Heater (NG)
$5,454.62 each
In Stock
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Product Image of 199,000 BTU ATI-510 Non-Condensing Ultra-Low NOx Indoor Tankless Water Heater (NG/LP)
$1,539.99 each
In Stock
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Product Image of High-Efficiency 70 Non-Condensing Direct Vent Indoor Tankless Water Heater (NG), RTG-70DVLN-3
$804.00 each
In Stock
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Product Image of CXP199IN 199,000 BTU Commercial Condensing Indoor Tankless Water Heater w/ Integrated Pump (Natural Gas)
$2,005.29 each
In Stock
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Product Image of Series 200 Ultra Low-NOx Non-Condensing Outdoor Tankless Water Heater (10 GPM, NG/LP)
$898.47 each
In Stock
Get 3 by Thu, Jun 18
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Product Image of High-Efficiency 9.5 GPM Non-Condensing Indoor Natural Gas Tankless Water Heater, RTG-95DVLN-3
$1,243.00 each
In Stock
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In Stock
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Product Image of RE180e 180,000 BTU, Non-Condensing Outdoor Tankless Water Heater (Natural Gas)
$1,212.40 each
In Stock
Get 1 by Wed, Jun 17
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Product Image of RE160e 160,000 BTU, Non-Condensing Outdoor Tankless Water Heater (Natural Gas)
$992.60 each
In Stock
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Product Image of NC199DVC 199,000 BTU Concentric Vent Commercial Tankless Water Heater (NG)
$1,838.47 each
In Stock
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Product Image of 160,000 BTU ATM-160M Adapt SC Standard Condensing Ultra-Low NOx Tankless Water Heater (NG)
$1,418.75 each
In Stock
Get 5 by Wed, Jun 17 - Fri, Jun 19
In Stock
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Product Image of 180,000 BTU ATM-180M Adapt SC Standard Condensing Ultra-Low NOx Tankless Water Heater (NG)
$1,537.50 each
In Stock
Get 5 by Wed, Jun 17 - Fri, Jun 19
In Stock
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Product Image of V53DEN 120,000 BTU High Efficiency Outdoor Tankless Heater (Natural Gas)
$741.65 each
In Stock
Get 2 by Wed, Jun 17
In Stock
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Product Image of T-H3M-OS-N Outdoor Tankless High Efficiency Condensing Water Heater (NG)
$934.86 each
In Stock
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Product Image of RUCS65IN 130,000 BTU, Condensing Indoor Tankless Water Heater (Natural Gas)
$999.99 each
In Stock
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Product Image of RE140i 140,000 BTU, Non-Condensing Indoor Tankless Water Heater (Natural Gas)
$913.03 each
In Stock
Get 90 by Thu, Jun 18
In Stock
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Product Image of 190,000 BTU ATI-310 Non-Condensing Ultra-Low NOx Indoor Tankless Water Heater (NG/LP)
$1,378.92 each
In Stock
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In Stock
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Product Image of Mid Efficiency 9.5 GPM Outdoor Natural Gas Tankless Water Heater, RTG-95XLN-3
$1,243.00 each
In Stock
Get 63 by Fri, Jun 19
In Stock
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Product Image of CX160IN 160,000 BTU, Commercial Condensing Indoor Tankless Water Heater (Natural Gas)
$1,355.13 each
In Stock
Get 1 by Wed, Jun 17
In Stock
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Product Image of RTGH Super High Efficiency 9.0 GPM Indoor Condensing Tankless Water Heater (Natural Gas), RTGH-90DVLN-3
$1,336.00 each
In Stock
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In Stock
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Product Image of IKONIC High-Efficiency 11.0 GPM Indoor Condensing Tankless Natural Gas Water Heater with Recirculation Pump, RTGH-SR11I
$2,054.17 each
In Stock
Get 4 by Wed, Jun 17 - Fri, Jun 19
In Stock
Get 4 by Wed, Jun 17 - Fri, Jun 19