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0.95+ (59)

Flow Rate At 50F Temp Rise (GPM)
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3.9 (4)
4.4 (6)
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5.1 (1)
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6.1 (10)
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Indoor Only (93)
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Outdoor (1)
Outdoor Only (62)

Flow Rate At 40F Temp Rise (GPM)
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4.9 (2)
5.0 (2)
5.4 (4)
5.5 (2)
5.8 (8)
6 (1)
6.3 (1)
6.6 (3)
6.7 (8)
7.1 (4)

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Natural Gas (267)
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100,000 (2)
120,000 (14)
130,000 (2)
140,000 (15)
157,000 (6)
160,000 (21)
165,000 (2)
170,000 (2)
180,000 (25)
190,000 (7)

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ABS (20)
Atmospheric (120)
Concentric (18)
Concentric Direct-Vent Termination (6)
CPVC (20)
Direct Exhaust (4)
Direct Vent (111)
Outdoor (No Venting) (28)
Polypropylene (20)
Power Direct Vent (8)

Flow Rate At 70F Temp Rise (GPM)
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2.8 (4)
3.2 (6)
3.3 (8)
3.5 (1)
3.6 (1)
3.8 (4)
4.2 (4)
4.3 (9)
4.4 (1)
4.5 (5)

Flow Rate At 60F Temp Rise (GPM)
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3.3 (4)
3.7 (2)
3.8 (10)
3.9 (2)
4 (1)
4.2 (1)
4.4 (3)
4.9 (4)
5 (10)
5.2 (2)

Review Score
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(131)
(21)
(3)
(4)
(6)

Price Range
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$100 to $200 (1)
$300 to $400 (2)
$400 to $500 (2)
$500 to $600 (7)
$600 to $700 (8)
$700 to $800 (6)
$800 to $900 (11)
$900 to $1000 (18)
$1000 to $1500 (123)
$1500 to $2000 (110)

Residential Gas Water Heaters

414 items
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Product Image of 50 Gallon GTP-130 130,000 BTU Polaris High Efficiency Power Direct Vent Gas Water Heater - Tall (LP)
$7,555.00 each
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Product Image of 50 Gallon GCR-50 40,000 BTU ProLine Residential Gas Water Heater - Tall (NG)
$1,013.04 each
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Product Image of 50 Gallon GCRX-50 54,000 BTU ProLine High Recovery Residential Gas Water Heater, 6 Yr Warranty - Tall (LP)
$1,762.75 each
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Product Image of PRO+G75-76N RU PV 75 Gallon 76,000 BTU Tall Professional Achiever Plus Heavy Duty Power Vent Water Heater, 8 Year (NG)
$2,800.20 each
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Product Image of 40 Gallon - 34,000 BTU Residential Ultra Low NOx Gas Water Heater (Natural Gas)
$1,734.50 each
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Product Image of 50 Gallon - 40,000 BTU Defender Safety System Damper Atmos. Vent High EF Energy Saver Residential Water Heater (Nat Gas)
$1,823.26 each
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Product Image of 48 Gallon - 35,000 BTU Defender Safety System High Efficiency Energy Saver Residential Atmospheric Water Heater (LP Gas)
$1,485.33 each
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Product Image of 100 Gallon PCG-100 75,100 BTU ProLine High Recovery Residential Gas Water Heater, 10 Yr Warranty - Tall (LP)
$3,529.38 each
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Product Image of 40 Gallon - 38,000 BTU Defender Safety System Damper Atmos. Vent High EF Energy Saver Residential Water Heater (Nat Gas)
$1,466.33 each
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Product Image of 160,000 BTU ATI-240HX3 Condensing Ultra-Low NOx Indoor Tankless Water Heater w/ X3 Scale Prevention (LP)
$1,735.00 each
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Product Image of 50 Gallon - 65,000 BTU Residential Combi2 Atmospherically Vented Water Heater (Natural Gas)
$5,159.31 each
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Product Image of 40 Gallon GCFL-40 40,000 BTU ProLine XE Series 100 High Efficiency Residential Gas Water Heater - Short (NG)
$1,536.00 each
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Product Image of 50 Gallon GCR-50 37,000 BTU ProLine Residential Gas Water Heater - Tall (LP)
$1,138.75 each
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Product Image of 50 Gallon GPVX-50L 62,000 BTU ProLine Power Vent Residential Gas Water Heater w/ Side Connections - Short (LP)
$2,866.07 each
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Product Image of 40 Gallon GPVT-40L 50,000 BTU ProLine XE Power Vent Residential Gas Water Heater w/ Side Connections - Tall (NG)
$1,845.25 each
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Product Image of 50 Gallon GPDX-50 62,000 BTU ProLine Power Direct Vent Residential Gas Water Heater w/ Side Conns. - Tall (NG)
$2,835.01 each
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Product Image of NC380 380,000 BTU Single Vent Commercial Tankless Water Heater (LP)
$5,678.74 each
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Product Image of 40 Gallon - 30,000 BTU Manufactured Home Direct Vent Energy Saver Closed Combustion Residential Water Heater (LP Gas)
$1,536.26 each
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Product Image of 50 Gal. 50,000 BTU Defender Safety System Atmos. Vent Energy Saver Residential Water Heater w/ Hi-Alt Kit (NG)
$1,542.72 each
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Product Image of SmartHome 80,000 BTU Indoor Tankless Water Heater (4.5 GPM, NG)
$499.00 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 72 Gallon - 76,000 BTU Combi2 TTW Power Vent Energy Saver Residential Water Heater (Nat Gas)
$5,216.67 each
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Product Image of EZ98DV 180,000 BTU Indoor/Outdoor Residential Tankless Water Heater (LP)
$1,638.79 each
In Stock
Get 1 by Tue, Oct 20
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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 30 Gallon GCR-30 32,000 BTU ProLine Residential Gas Water Heater - Tall (NG)
$1,423.31 each
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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 Wed, Oct 21 - Fri, Oct 23
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Product Image of 40 Gallon - 40,000 BTU Residential Ultra Low NOx Gas Water Heater (Natural Gas)
$1,738.19 each
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Product Image of 40 Gallon - 40,000 BTU NG Defender Safety System Atmos. Vent Energy Saver Residential Water Heater w/ Top T&P
$1,299.98 each
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Product Image of 48 Gal. 65,000 BTU Defender Safety System Extra Recov. Energy Saver Residential Atmos. Water Heater, Hi-Alt (NG)
$1,857.02 each
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Product Image of 40 Gallon - 38,000 BTU Defender Safety System PDX1 Power Direct Vent Energy Saver Residential Water Heater (LP Gas)
$2,308.65 each
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Product Image of 50 Gallon XCR-50 40,000 BTU ProLine Plus High Efficiency Residential Gas Water Heater, 10 Yr Warranty - Tall (NG)
$1,121.68 each
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Product Image of 40 Gallon XCR-40 36,000 BTU ProLine Plus High Efficiency Residential Gas Water Heater, 10 Yr Warranty - Tall (LP)
$1,233.99 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 Thu, Oct 22 - Fri, Oct 23
In Stock
Get 200 by Thu, Oct 22 - Fri, Oct 23
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Product Image of 50 Gallon - 40,000 BTU Defender Safety System High Efficiency Residential Atmospheric Water Heater w/ 10 Year Warranty (NG)
$1,681.26 each
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Product Image of 55 Gallon - 78,000 BTU High Performance Atmospheric Vent Residential Water Heater (Nat Gas)
$2,568.44 each
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Product Image of 50 Gallon - 42,000 BTU Defender Safety System Solid Vent Energy Saver Residential Water Heater (NG)
$2,377.58 each
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Product Image of ACO-CRS-24IL-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 EZ Supreme on Demand Tankless Water Heater, 3-4 Bath w/ Direct Vent Kit (LP)
$845.85 each
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Product Image of EZ ULTRA HE Indoor Condensing Tankless Water Heater (NG)
$707.95 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 98 Gallon FCG-100 75,100 BTU ProLine High Recovery Residential Gas Water Heater, 6 Yr Warranty - Tall (LP)
$3,704.01 each
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Product Image of EZ ULTRA HE Indoor Condensing Tankless Water Heater (LPG)
$698.95 each
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Product Image of EZ Deluxe on Demand Tankless Water Heater, 1-2 Bath w/ Direct Vent Kit (NG)
$578.95 each
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Product Image of 50 Gallon ProLine Master Atmospheric Vent Residential Gas Water Heater, Ultra-Low Nox - Tall Model (NG)
$2,181.48 each
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Product Image of 50 Gallon GPDT-50 45,000 BTU ProLine Power Direct Vent Residential Gas Water Heater - Tall (LP)
$2,570.01 each
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Product Image of 40 Gallon GPNH-40 42,000 BTU ProLine Ultra Low NOx Power Vent Residential Gas Water Heater - Tall (NG)
$2,436.41 each
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Product Image of 160,000 BTU ATO-240H Condensing Ultra-Low NOx Outdoor Tankless Water Heater (LP)
$1,220.51 each
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Product Image of 199,000 BTU ATO-540HX3 Condensing Ultra-Low NOx Outdoor Tankless Water Heater w/ X3 Scale Prevention (LP)
199,000 BTU ATO-540HX3 Condensing Ultra-Low NOx Outdoor Tankless Water Heater w/ X3 Scale Prevention (LP)
SKU: ATO-540HX3-P
AO Smith
SKU: ATO-540HX3-P
Brand: AO Smith
$2,023.75 each
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