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Natural Gas (124)
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70,000 (1)
80,000 (3)
84,000 (1)
100,000 (1)
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130,000 (2)
140,000 (12)
157,000 (3)
160,000 (15)
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0.80 - 0.85 (39)
0.85 - 0.90 (5)
0.90 - 0.95 (47)
0.95+ (45)

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Concentric (16)
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Direct Exhaust (2)
Direct Vent (59)
Outdoor (No Venting) (19)
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Indoor Only (67)
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Flow Rate At 40F Temp Rise (GPM)
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5.4 (2)
5.5 (1)
5.8 (5)
6 (1)
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6.6 (2)
6.7 (1)
7.1 (2)

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4.4 (3)
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4.6 (3)
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5.1 (1)
5.3 (2)
5.8 (2)
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6.2 (6)

Flow Rate At 60F Temp Rise (GPM)
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3.7 (1)
3.8 (5)
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5 (2)
5.2 (2)

Flow Rate At 70F Temp Rise (GPM)
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2.8 (2)
3.2 (3)
3.3 (5)
3.5 (1)
3.6 (1)
3.8 (3)
4.2 (2)
4.3 (1)
4.4 (1)
4.5 (5)

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(36)
(8)
(1)
(2)

Price Range
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$40 to $45 (1)
$300 to $400 (1)
$400 to $500 (2)
$500 to $600 (4)
$600 to $700 (5)
$700 to $800 (7)
$800 to $900 (8)
$900 to $1000 (8)
$1000 to $1500 (27)
$1500 to $2000 (37)

Tankless Natural Gas Water Heaters

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Product Image of RE140e 140,000 BTU, Non-Condensing Outdoor Tankless Water Heater (Propane)
RE140e 140,000 BTU, Non-Condensing Outdoor Tankless Water Heater (Propane)
SKU: RE140EP
Rinnai
SKU: RE140EP
Brand: Rinnai
$884.10 each
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Product Image of RTG-S-199-N1 INFINITI GS-Series Indoor Tankless Condensing Water Heater, 9.7 GPM (Natural Gas)
$1,475.00 each
In Stock
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Product Image of High Efficiency 8.4 GPM Indoor Non-Condensing Tankless Water Heater (NG), RTG-84DVLN-3
$1,002.73 each
In Stock
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Product Image of T-H3M-OS-N Outdoor Tankless High Efficiency Condensing Water Heater (NG)
$934.86 each
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Product Image of NCC199CDV Pro 199,900 BTU Indoor/Outdoor Direct Vent Commercial Tankless Water Heater (NG/LP)
$2,958.43 each
In Stock
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Product Image of Greentherm T 9800 SE 199 NG Tankless Water Heater
Greentherm T 9800 SE 199 NG Tankless Water Heater
SKU: 7736503581
Bosch
SKU: 7736503581
Brand: Bosch
$2,429.37 each
In Stock
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Product Image of RTG-R-199-N1 INFINITI GR-Series Indoor Tankless Condensing Water Heater, 9.7 GPM (Natural Gas)
$1,704.13 each
In Stock
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Product Image of SmartHome 80,000 BTU Indoor Tankless Water Heater (4 GPM, NG)
$449.00 each
In Stock
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Product Image of TCT-199I-N 199,000 BTU High Commercial Indoor Condensing Ultra-Low NOx Tankless Water Heater (NG)
$1,933.19 each
Out of Stock
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Product Image of RE140e 140,000 BTU, Non-Condensing Outdoor Tankless Water Heater (Natural Gas)
$884.10 each
In Stock
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Product Image of 180,000 BTU ATM-180X3 Adapt SC Standard Condensing Ultra-Low NOx Tankless Water Heater with X3 Scale Prevention Technology (NG)
$1,787.50 each
In Stock
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Product Image of Builder Series Outdoor Tankless Water Heater (6.8 GPM, NG)
$599.00 each
In Stock
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Product Image of 199,000 BTU ACT-199I Condensing Ultra-Low NOx Indoor Tankless Water Heater (NG)
$2,246.71 each
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Product Image of 199,000 BTU ATO-510 Non-Condensing Ultra-Low NOx Outdoor Tankless Water Heater (NG/LP)
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Product Image of NRC98OD 180,000 BTU Outdoor Vent Condensing Residential Tankless Water Heater (NG)
$1,825.94 each
In Stock
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Product Image of 199,000 BTU ATO-540P Condensing Ultra-Low NOx Outdoor Tankless Water Heater w/ Integrated Recirc. Pump (NG)
$1,716.65 each
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Product Image of RTG-K-160-N1 INFINITI K Indoor Tankless Condensing Water Heater, 7 GPM (Natural Gas)
$1,758.45 each
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Product Image of NC199OD 199,900 BTU Outdoor Commercial Tankless Water Heater (NG)
$1,667.00 each
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Product Image of CXP160IN 160,000 BTU Commercial Condensing Indoor Tankless Water Heater w/ Integrated Pump (Natural Gas)
$1,608.39 each
In Stock
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Product Image of 199,000 BTU ATI-540P Condensing Ultra-Low NOx Indoor Tankless Water Heater w/ Integrated Recirc. Pump (NG)
$1,813.08 each
In Stock
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Product Image of 199,000 BTU ACT-199O Condensing Ultra-Low NOx Outdoor Tankless Water Heater (NG)
$1,960.43 each
In Stock
Get 6 by Fri, Oct 9
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Product Image of 160,000 BTU ATM-160X3 Adapt SC Standard Condensing Ultra-Low NOx Tankless Water Heater with X3 Scale Prevention Technology (NG)
$1,668.75 each
In Stock
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Product Image of RTG-L-199-N1 INFINITI L-Series Indoor Tankless Condensing Water Heater, 8.7 GPM (Natural Gas)
$1,919.15 each
In Stock
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Product Image of TK-510C-NI Indoor Tankless Non-Condensing Concentric Vent Water Heater, 199,000 BTU
$1,459.36 each
In Stock
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Product Image of 199,000 BTU ATI-510C Non-Condensing Ultra-Low NOx Indoor Tankless Water Heater (NG)
$1,381.68 each
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Product Image of Greentherm T 9900 SE 199 NG Tankless Water Heater
Greentherm T 9900 SE 199 NG Tankless Water Heater
SKU: 7736503731
Bosch
SKU: 7736503731
Brand: Bosch
$3,243.22 each
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Product Image of SmartHome 80,000 BTU Indoor Tankless Water Heater (4.5 GPM, NG)
$499.00 each
Out of Stock
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Product Image of EZTR50 180,000 BTU Multi Vent Condensing Tankless Water Heater Bundle Pack (NG)
$2,387.81 each
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Product Image of EZTR75 199,000 BTU Multi Vent Condensing Tankless Water Heater Bundle Pack (NG)
$2,509.32 each
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Product Image of 140,000 BTU ATO-110 Non-Condensing Ultra-Low NOx Outdoor Tankless Water Heater (NG/LP)
$924.50 each
In Stock
Get 1 by Tomorrow, Oct 7
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Product Image of RTG-K-160-N2 INFINITI K Outdoor Tankless Condensing Water Heater, 7 GPM (Natural Gas)
$1,758.45 each
In Stock
Get 3 by Thu, Oct 8 - Mon, Oct 12
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Product Image of 597,000 BTU Commercial Indoor Tankless Rack System - Wall Mount (NG)
$9,738.57 each
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Product Image of EZ98DV 180,000 BTU Indoor/Outdoor Residential Tankless Water Heater (NG)
$1,753.08 each
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Product Image of EZ 202 Portable Tankless Water Heater (NG)
$354.00 each
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Product Image of SmartHome 140,000 BTU Indoor Tankless Water Heater w/ Voice Commands (6.8 GPM, NG)
$699.00 each
In Stock
Get 200 by Fri, Oct 9 - Mon, Oct 12
In Stock
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Product Image of CHS16080HCXiN H-Series 160,000 BTU, Demand Duo Commercial Condensing Indoor Hybrid Tankless Water Heater (Natural Gas)
$8,362.50 each
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Product Image of T-H3J-OS-N Outdoor Tankless High Efficiency Condensing Water Heater (NG)
$1,129.70 each
In Stock
Get 5 by Tomorrow, Oct 7
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Product Image of ACO-CRS-26IL-N 398,000 BTU Commercial Outdoor Tankless Rack System - Free-Standing In-Line (NG)
$8,856.96 each
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Product Image of High Efficiency 9.5 GPM Indoor Natural Gas EcoNet Included Tankless Water Heater, RTGH-95DVELN-3
$2,394.46 each
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Product Image of IKONIC High-Efficiency 10.0 GPM Indoor Condensing Tankless Natural Gas Water Heater with Recirculation Pump, RTGH-SR10I
$1,915.55 each
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Product Image of NRC661 120,000 BTU Outdoor Vent Condensing Residential Tankless Water Heater (NG)
$1,052.69 each
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Product Image of 597,000 BTU Commercial Outdoor Tankless Rack System - Wall Mount (NG)
$9,738.57 each
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Product Image of EZTR40 120,000 BTU Indoor Direct Vent Condensing Tankless Water Heater Bundle Pack (NG)
$1,813.78 each
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Product Image of NRC111OD 199,900 BTU Outdoor Condensing Vent Residential Tankless Water Heater (NG)
$1,779.85 each
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Product Image of RTG-199ME-N INFINITI Mid Efficiency Indoor Tankless Water Heater (7.3 GPM, NG)
$1,564.20 each
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Product Image of T-H3S-OS-N Outdoor Tankless High Efficiency Condensing Water Heater (NG)
$942.96 each
Out of Stock
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Product Image of Sapphire Series 12L 80,000 BTU Tankless Water Heater (NG)
$537.38 each
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Product Image of EZ ULTRA HE Indoor Condensing Tankless Water Heater (NG)
$707.95 each
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Get it by Wed, Nov 4 - Thu, Dec 3