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Show In Stock Only (74)

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AO Smith (31)
Bosch (3)
Bradford White (8)
Eccotemp (6)
EZ Tankless (7)
Noritz (24)
Rheem (13)
Rinnai (24)
Takagi (13)

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Natural Gas (124)
Propane (26)

BTU (Max)
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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 (15)
165,000 (1)

Energy Factor
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0.80 - 0.85 (39)
0.85 - 0.90 (5)
0.90 - 0.95 (47)
0.95+ (45)

Vent Type
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Concentric (16)
Concentric Direct-Vent Termination (3)
Direct Exhaust (2)
Direct Vent (59)
Outdoor (No Venting) (19)
Power Direct Vent (6)
Power Vent (10)

Installation Type
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Indoor Only (67)
Indoor/Outdoor (19)
Outdoor Only (39)

Flow Rate At 40F Temp Rise (GPM)
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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 (1)
7.1 (2)

Flow Rate At 50F Temp Rise (GPM)
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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 (2)
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 (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)

Review Score
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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

129 items
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Product Image of High Efficiency 9.5 GPM Indoor Propane Gas EcoNet Enabled Tankless Water Heater, RTGH-95DVELP-3
High Efficiency 9.5 GPM Indoor Propane Gas EcoNet Enabled Tankless Water Heater, RTGH-95DVELP-3
SKU: RTGH-95DVELP-3
Rheem
SKU: RTGH-95DVELP-3
Brand: Rheem
$1,785.00 each
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Product Image of 398,000 BTU Commercial Indoor Tankless Rack System - Free-Standing Back-to-Back (NG)
398,000 BTU Commercial Indoor Tankless Rack System - Free-Standing Back-to-Back (NG)
SKU: ACI-CRS-24B2B-N
AO Smith
SKU: ACI-CRS-24B2B-N
Brand: AO Smith
$8,856.96 each
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Get it by Thu, Nov 5 - Tue, Dec 8
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Product Image of NRC711 157,000 BTU Outdoor Vent Condensing Residential Tankless Water Heater (NG)
NRC711 157,000 BTU Outdoor Vent Condensing Residential Tankless Water Heater (NG)
SKU: NRC711-OD-NG
Noritz
SKU: NRC711-OD-NG
Brand: Noritz
$1,295.62 each
Backorder
Get it by Wed, Nov 4 - Thu, Dec 3
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Product Image of 398,000 BTU Commercial Outdoor Tankless Rack System - Free Standing Back-To-Back (NG)
398,000 BTU Commercial Outdoor Tankless Rack System - Free Standing Back-To-Back (NG)
SKU: ACO-CRS-24B2B-N
AO Smith
SKU: ACO-CRS-24B2B-N
Brand: AO Smith
$8,856.96 each
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Get it by Thu, Nov 5 - Tue, Dec 8
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Product Image of 199,000 BTU Ultra Low-NOx Natural Gas Indoor Condensing Tankless Water Heater (10 GPM)
199,000 BTU Ultra Low-NOx Natural Gas Indoor Condensing Tankless Water Heater (10 GPM)
SKU: TK-540P-NIH
Takagi
SKU: TK-540P-NIH
Brand: Takagi
(4)
$1,478.62 each
In Stock
Get 6 by Thu, Oct 8
In Stock
Get 6 by Thu, Oct 8
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Product Image of NR83DVC 180,000 BTU Concentric Vent Residential Tankless Water Heater (NG)
NR83DVC 180,000 BTU Concentric Vent Residential Tankless Water Heater (NG)
SKU: NR83DVC-NG
Noritz
SKU: NR83DVC-NG
Brand: Noritz
$1,554.05 each
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Get it by Wed, Nov 4 - Thu, Dec 3
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Product Image of NRC711 157,000 BTU Direct Vent Condensing Residential Tankless Water Heater (NG)
NRC711 157,000 BTU Direct Vent Condensing Residential Tankless Water Heater (NG)
SKU: NRC711-DV-NG
Noritz
SKU: NRC711-DV-NG
Brand: Noritz
$1,476.13 each
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Product Image of High Efficiency 9.5 GPM Indoor Tankless Water Heater w/ Recirculation Pump (NG), RTG-RC95DVLN-3
High Efficiency 9.5 GPM Indoor Tankless Water Heater w/ Recirculation Pump (NG), RTG-RC95DVLN-3
SKU: RTG-RC95DVLN-3
Rheem
SKU: RTG-RC95DVLN-3
Brand: Rheem
$2,195.96 each
Backorder
Get it by Wed, Nov 4 - Thu, Dec 3
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Product Image of ACI-CRS-24IL-N 398,000 BTU Commercial Indoor Tankless Rack System - Free-Standing In-Line (NG)
ACI-CRS-24IL-N 398,000 BTU Commercial Indoor Tankless Rack System - Free-Standing In-Line (NG)
SKU: ACI-CRS-24IL-N
AO Smith
SKU: ACI-CRS-24IL-N
Brand: AO Smith
$8,856.96 each
Backorder
Get it by Thu, Nov 5 - Tue, Dec 8
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Product Image of EZ Supreme on Demand Tankless Water Heater, 3-4 Bath w/ Direct Vent Kit (NG)
EZ Supreme on Demand Tankless Water Heater, 3-4 Bath w/ Direct Vent Kit (NG)
SKU: EZ-SUPREME-NG
EZ Tankless
SKU: EZ-SUPREME-NG
Brand: EZ Tankless
(1)
$896.04 each
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Get it by Wed, Nov 4 - Thu, Dec 3
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Product Image of SmartHome 140,000 BTU Outdoor Tankless Water Heater w/ Voice Commands (6.8 GPM, NG)
SmartHome 140,000 BTU Outdoor Tankless Water Heater w/ Voice Commands (6.8 GPM, NG)
SKU: SH22-NG
Eccotemp
SKU: SH22-NG
Brand: Eccotemp
$699.00 each
In Stock
Get 300 by Fri, Oct 9 - Mon, Oct 12
In Stock
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Product Image of ACO-CRS-24IL-N 398,000 BTU Commercial Outdoor Tankless Rack System - Free-Standing In-Line (NG)
ACO-CRS-24IL-N 398,000 BTU Commercial Outdoor Tankless Rack System - Free-Standing In-Line (NG)
SKU: ACO-CRS-24IL-N
AO Smith
SKU: ACO-CRS-24IL-N
Brand: AO Smith
$8,856.96 each
Backorder
Get it by Thu, Nov 5 - Tue, Dec 8
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Product Image of Builder Series Outdoor Tankless Water Heater (7 GPM, NG)
Builder Series Outdoor Tankless Water Heater (7 GPM, NG)
SKU: 7GB-NG
Eccotemp
SKU: 7GB-NG
Brand: Eccotemp
$699.00 each
In Stock
Get 110 by Fri, Oct 9 - Mon, Oct 12
In Stock
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Product Image of Greentherm T-9800 SE 160 NG Tankless Water Heater (160000 BTU)
Greentherm T-9800 SE 160 NG Tankless Water Heater (160000 BTU)
SKU: 7736503725
Bosch
SKU: 7736503725
Brand: Bosch
$2,463.67 each
Backorder
Get it by Thu, Nov 5 - Tue, Dec 8
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Product Image of Sapphire Series 14L 100,000 BTU Tankless Water Heater (NG)
Sapphire Series 14L 100,000 BTU Tankless Water Heater (NG)
SKU: SAP14L-NG
EZ Tankless
SKU: SAP14L-NG
Brand: EZ Tankless
$597.10 each
Backorder
Get it by Wed, Nov 4 - Thu, Dec 3
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Product Image of RTG-199HE-N INFINITI High Efficiency Indoor Tankless Condensing Water Heater (8.3 GPM, NG)
RTG-199HE-N INFINITI High Efficiency Indoor Tankless Condensing Water Heater (8.3 GPM, NG)
SKU: RTG-199HE-N
Bradford White
SKU: RTG-199HE-N
Brand: Bradford White
$1,822.50 each
Backorder
Get it by Thu, Nov 5 - Tue, Dec 8
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Product Image of ACI-CRS-23WM-N 398,000 BTU Commercial Indoor Tankless Rack System - Wall Mount (NG)
ACI-CRS-23WM-N 398,000 BTU Commercial Indoor Tankless Rack System - Wall Mount (NG)
SKU: ACI-CRS-23WM-N
AO Smith
SKU: ACI-CRS-23WM-N
Brand: AO Smith
$6,489.72 each
Backorder
Get it by Thu, Nov 5 - Tue, Dec 8
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Product Image of High Efficiency 9.5 GPM Indoor Wi-Fi LeakGuard Detection Non-Condensing Tankless Water Heater (NG), RTG-95DVELN-3
High Efficiency 9.5 GPM Indoor Wi-Fi LeakGuard Detection Non-Condensing Tankless Water Heater (NG), RTG-95DVELN-3
SKU: RTG-95DVELN-3
Rheem
SKU: RTG-95DVELN-3
Brand: Rheem
$2,080.88 each
Backorder
Get it by Wed, Nov 4 - Thu, Dec 3
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Product Image of ACO-CRS-23WM-N 398,000 BTU Commercial Outdoor Tankless Rack System - Wall Mount (NG)
ACO-CRS-23WM-N 398,000 BTU Commercial Outdoor Tankless Rack System - Wall Mount (NG)
SKU: ACO-CRS-23WM-N
AO Smith
SKU: ACO-CRS-23WM-N
Brand: AO Smith
$6,489.72 each
Backorder
Get it by Thu, Nov 5 - Tue, Dec 8
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Product Image of 199,000 BTU Ultra Low-NOx Natural Gas Outdoor Condensing Tankless Water Heater (10 GPM)
199,000 BTU Ultra Low-NOx Natural Gas Outdoor Condensing Tankless Water Heater (10 GPM)
SKU: TK-540P-NEH
Takagi
SKU: TK-540P-NEH
Brand: Takagi
$1,452.83 each
In Stock
Get 2 by Tomorrow, Oct 7
In Stock
Get 2 by Tomorrow, Oct 7
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Product Image of 190,000 BTU ATI-310C Non-Condensing Ultra-Low NOx Indoor Tankless Water Heater (NG)
190,000 BTU ATI-310C Non-Condensing Ultra-Low NOx Indoor Tankless Water Heater (NG)
SKU: ATI-310C-N
AO Smith
SKU: ATI-310C-N
Brand: AO Smith
(1)
$1,171.69 each
Backorder
Get it by Wed, Nov 4 - Thu, Dec 3
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Product Image of 190,000 BTU ATO-310 Non-Condensing Outdoor Tankless Water Heater (NG/LP)
190,000 BTU ATO-310 Non-Condensing Outdoor Tankless Water Heater (NG/LP)
SKU: ATO-310-U
AO Smith
SKU: ATO-310-U
Brand: AO Smith
$1,378.69 each
Backorder
Get it by Wed, Nov 4 - Thu, Dec 3
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Product Image of Packaging for EZ98DV Tankless Water Heaters
Packaging for EZ98DV Tankless Water Heaters
SKU: FDAN101
Noritz
SKU: FDAN101
Brand: Noritz
$43.01 each
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Product Image of NR662 140,000 BTU Outdoor Residential Tankless Water Heater (NG)
NR662 140,000 BTU Outdoor Residential Tankless Water Heater (NG)
SKU: NR662-OD-NG
Noritz
SKU: NR662-OD-NG
Brand: Noritz
(1)
$899.56 each
Backorder
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Product Image of Sapphire Series 24L 170,000 BTU Tankless Water Heater (NG)
Sapphire Series 24L 170,000 BTU Tankless Water Heater (NG)
SKU: SAP24L-NG
EZ Tankless
SKU: SAP24L-NG
Brand: EZ Tankless
$850.29 each
Backorder
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Product Image of RTGH Super High Efficiency 8.4 GPM Indoor Condensing Tankless Water Heater (Natural Gas), RTGH-84DVLN-3
RTGH Super High Efficiency 8.4 GPM Indoor Condensing Tankless Water Heater (Natural Gas), RTGH-84DVLN-3
SKU: RTGH-84DVLN-3
Rheem
SKU: RTGH-84DVLN-3
Brand: Rheem
$1,470.18 each
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Product Image of ACI-CRS-22WM-N 398,000 BTU Commercial Indoor Tankless Rack System - Wall Mount (NG)
ACI-CRS-22WM-N 398,000 BTU Commercial Indoor Tankless Rack System - Wall Mount (NG)
SKU: ACI-CRS-22WM-N
AO Smith
SKU: ACI-CRS-22WM-N
Brand: AO Smith
$6,066.13 each
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Product Image of ACO-CRS-22WM-N 398,000 BTU Commercial Outdoor Tankless Rack System - Wall Mount (NG)
ACO-CRS-22WM-N 398,000 BTU Commercial Outdoor Tankless Rack System - Wall Mount (NG)
SKU: ACO-CRS-22WM-N
AO Smith
SKU: ACO-CRS-22WM-N
Brand: AO Smith
$6,066.13 each
Backorder
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Product Image of ACI-CRS-26IL-N 398,000 BTU Commercial Indoor Tankless Rack System - Free-Standing In-Line (NG)
ACI-CRS-26IL-N 398,000 BTU Commercial Indoor Tankless Rack System - Free-Standing In-Line (NG)
SKU: ACI-CRS-26IL-N
AO Smith
SKU: ACI-CRS-26IL-N
Brand: AO Smith
$8,856.96 each
Backorder
Get it by Thu, Nov 5 - Tue, Dec 8
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Product Image of RTG-K-199-N2 INFINITI K Outdoor Tankless Condensing Water Heater, 8.7 GPM (Natural Gas)
RTG-K-199-N2 INFINITI K Outdoor Tankless Condensing Water Heater, 8.7 GPM (Natural Gas)
SKU: RTG-K-199-N2
Bradford White
SKU: RTG-K-199-N2
Brand: Bradford White
$2,062.95 each
In Stock
Get 2 by Thu, Oct 8 - Mon, Oct 12
In Stock
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Product Image of 120,000 BTU ATO-140H Condensing Ultra-Low NOx Outdoor Tankless Water Heater (NG)
120,000 BTU ATO-140H Condensing Ultra-Low NOx Outdoor Tankless Water Heater (NG)
SKU: ATO-140H-N
AO Smith
SKU: ATO-140H-N
Brand: AO Smith
$1,023.00 each
Backorder
Get it by Wed, Nov 4 - Thu, Dec 3
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Product Image of NHH Hybrid Hot 199,000 BTU Indoor Direct Vent Commercial Tankless Hybrid Water Heater (NG)
NHH Hybrid Hot 199,000 BTU Indoor Direct Vent Commercial Tankless Hybrid Water Heater (NG)
SKU: NHH199100-1-NG
Noritz
SKU: NHH199100-1-NG
Brand: Noritz
$10,173.36 each
Backorder
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Product Image of EZ Deluxe on Demand Tankless Water Heater, 1-2 Bath w/ Direct Vent Kit (NG)
EZ Deluxe on Demand Tankless Water Heater, 1-2 Bath w/ Direct Vent Kit (NG)
SKU: EZ-DELUXE-NG
EZ Tankless
SKU: EZ-DELUXE-NG
Brand: EZ Tankless
$578.95 each
Backorder
Get it by Wed, Nov 4 - Thu, Dec 3
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