Shop Best Whole House Gas Tankless Water Heaters 2021

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$1,498.64
Rheem RTGH-95DVLN-3 RTGH Series 9.5 GPM 199,900 BTU 120 Volt Residential Indoor Natural Gas Tankless Water Heater Stainless Steel
Amazon.com
15
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$1,498.64
Rheem RTGH-95DVLN-3 RTGH Series 9.5 GPM 199,900 BTU 120 Volt Residential Indoor Natural Gas Tankless Water Heater Stainless Steel
Amazon.com
15
$1,529.00
Rheem IKONIC rectgh-sr84in Professional Grade Super High Efficiency Condensing Tankless Natural Gas Water Heater With Recirculation, 8.4 GPM
Amazon.com
1
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$1,529.00
Rheem IKONIC rectgh-sr84in Professional Grade Super High Efficiency Condensing Tankless Natural Gas Water Heater With Recirculation, 8.4 GPM
Amazon.com
1
$1,240.47
Rheem RRTGH84DVLN3701171 Rheem RTGH Series 8.4 GPM 157,000 BTU 120 Volt Residential Indoor Natural Gas Tankless Water Heater Stainless Steel
Amazon.com
14
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$1,240.47
Rheem RRTGH84DVLN3701171 Rheem RTGH Series 8.4 GPM 157,000 BTU 120 Volt Residential Indoor Natural Gas Tankless Water Heater Stainless Steel
Amazon.com
14
$1,773.00
Navien NPE-210A2 180,000 BTU Condensing Premium Gas Tankless Water Heater
MyTanklesswaterHeater
Free shipping
$1,773.00
Navien NPE-210A2 180,000 BTU Condensing Premium Gas Tankless Water Heater
MyTanklesswaterHeater
Free shipping
$1,351.99
Rheem RRTGH95DVLP3701178 Rheem RTGH Series 9.5 GPM 199,900 BTU 120 Volt Residential Indoor Liquid Propane Tankless Water Heater Stainless Steel
Amazon.com
43
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$1,351.99
Rheem RRTGH95DVLP3701178 Rheem RTGH Series 9.5 GPM 199,900 BTU 120 Volt Residential Indoor Liquid Propane Tankless Water Heater Stainless Steel
Amazon.com
43
$1,645.55
NEW Rinnai rx199in Condensing Smart Sense Natural Gas Or Propane Tankless Water Heater, Indoor Or Outdoor Water Heater, Up To 11.1 GPM, 199,000 BTU
Amazon.com
128
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$1,645.55
NEW Rinnai rx199in Condensing Smart Sense Natural Gas Or Propane Tankless Water Heater, Indoor Or Outdoor Water Heater, Up To 11.1 GPM, 199,000 BTU
Amazon.com
128
$935.67
Rheem RTG-95DVLN-3 High Efficiency Non-Condensing Indoor Tankless Natural Gas Water Heater 9.5 GPM, 199,900 Btus
Amazon.com
116
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24% off
$935.67
Rheem RTG-95DVLN-3 High Efficiency Non-Condensing Indoor Tankless Natural Gas Water Heater 9.5 GPM, 199,900 Btus
Amazon.com
116
$750.00
$804.00
Rheem RTG-70XLN-3 High Efficiency Non-Condensing Outdoor Tankless Natural Gas Water Heater, 7.0 GPM, Gray
Amazon.com
74
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$750.00
$804.00
Rheem RTG-70XLN-3 High Efficiency Non-Condensing Outdoor Tankless Natural Gas Water Heater, 7.0 GPM, Gray
Amazon.com
74
$1,108.88
Rheem Natural Gas Condensing Tankless Water Heater Indoor Up To 9 GPM, 180,000 Btus Continuous Super High Efficient Hot Water
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15
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$1,108.88
Rheem Natural Gas Condensing Tankless Water Heater Indoor Up To 9 GPM, 180,000 Btus Continuous Super High Efficient Hot Water
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15
$1,736.20
Rheem Prestige Condensing Tankless Gas Indoor Natural Gas Water Heater With Built-In Recirculation 11.0 GPM - RTGH-RH11DVLN
Amazon.com
Free shipping
$1,736.20
Rheem Prestige Condensing Tankless Gas Indoor Natural Gas Water Heater With Built-In Recirculation 11.0 GPM - RTGH-RH11DVLN
Amazon.com
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$1,199.73
Rheem RTG-95XELP-3 High Efficiency Non-Condensing Outdoor Tankless Liquid Propane Water Heater 9.5 GPM With Wifi, 199,900 Btus
Amazon.com
60
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13% off
$1,199.73
Rheem RTG-95XELP-3 High Efficiency Non-Condensing Outdoor Tankless Liquid Propane Water Heater 9.5 GPM With Wifi, 199,900 Btus
Amazon.com
60
$1,224.97
Rheem RTG-95DVLP-3 High Efficiency Non-Condensing Indoor Tankless Liquid Propane Water Heater 9.5 GPM, 199,900 Btus
Amazon.com
1
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$1,224.97
Rheem RTG-95DVLP-3 High Efficiency Non-Condensing Indoor Tankless Liquid Propane Water Heater 9.5 GPM, 199,900 Btus
Amazon.com
1
$472.90
GASLAND Gasmart C 6.86 GPM Natural Gas Tankless Water Heater, Up To 199,000 BTU,CSA Certified Whole House Indoor Installation Residential On Demand
Amazon.com
131
Free shipping
$472.90
GASLAND Gasmart C 6.86 GPM Natural Gas Tankless Water Heater, Up To 199,000 BTU,CSA Certified Whole House Indoor Installation Residential On Demand
Amazon.com
131
$795.69
Rinnai Re140en Non-Condensing Natural Gas Tankless Water Heater, Up To 5.3 GPM, Outdoor Installation, 140,000 BTU
Amazon.com
81
Free shipping
$795.69
Rinnai Re140en Non-Condensing Natural Gas Tankless Water Heater, Up To 5.3 GPM, Outdoor Installation, 140,000 BTU
Amazon.com
81
$553.99
191000 BTU Gas Tankless Water Heater, 8 Gal. Instant Hot Water, Smart Control, 3/4 in. NPT, Safety For Whole House
Home Depot
Free shipping
$553.99
191000 BTU Gas Tankless Water Heater, 8 Gal. Instant Hot Water, Smart Control, 3/4 in. NPT, Safety For Whole House
Home Depot
Free shipping
$1,752.80
Rinnai cx199in Condensing Smart Sense Commercial Natural Gas Or Propane Tankless Water Heater, 199,000 BTU, 11.1 GPM
Amazon.com
2
Free shipping
$1,752.80
Rinnai cx199in Condensing Smart Sense Commercial Natural Gas Or Propane Tankless Water Heater, 199,000 BTU, 11.1 GPM
Amazon.com
2
$319.17
$399.00
Ranein Natural Gas Tankless Water Heater With Vent Pipe, Indoor Max 4.3 GPM, 100,000 BTU Instant Hot Water Heater
Amazon.com
501
Free shipping
20% off
$319.17
$399.00
Ranein Natural Gas Tankless Water Heater With Vent Pipe, Indoor Max 4.3 GPM, 100,000 BTU Instant Hot Water Heater
Amazon.com
501
$1,091.16
Rinnai Re180en Non-Condensing Natural Gas Tankless Water Heater, Up To 8.5 GPM, Outdoor Installation, 180,000 BTU
Amazon.com
71
Free shipping
$1,091.16
Rinnai Re180en Non-Condensing Natural Gas Tankless Water Heater, Up To 8.5 GPM, Outdoor Installation, 180,000 BTU
Amazon.com
71
$779.88
Performance Plus 7.0 GPM Non-Condensing Outdoor Natural Gas Tankless Water Heater
Home Depot
94
Free shipping
$779.88
Performance Plus 7.0 GPM Non-Condensing Outdoor Natural Gas Tankless Water Heater
Home Depot
94
$546.86
Rheem RTEX-24 24Kw 240V Electric Tankless Water Heater, Gray
Amazon.com
725
Free shipping
$546.86
Rheem RTEX-24 24Kw 240V Electric Tankless Water Heater, Gray
Amazon.com
725
$1,016.19
Rinnai Rep160en Smart-Circ Non-Condensing Natural Gas Tankless Water Heater With Built-In Recirculation Pump, Up To 6.6 GPM, Outdoor Installation,
Amazon.com
52
Free shipping
$1,016.19
Rinnai Rep160en Smart-Circ Non-Condensing Natural Gas Tankless Water Heater With Built-In Recirculation Pump, Up To 6.6 GPM, Outdoor Installation,
Amazon.com
52
$1,280.79
Rinnai Re199ep Non-Condensing Propane Tankless Water Heater, Up To 9.8 GPM, Outdoor Installation, 199,000 BTU
Amazon.com
76
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$1,280.79
Rinnai Re199ep Non-Condensing Propane Tankless Water Heater, Up To 9.8 GPM, Outdoor Installation, 199,000 BTU
Amazon.com
76
$1,091.16
Rinnai re180in Non-Condensing Natural Gas Tankless Water Heater, Up To 8.5 GPM, Indoor Installation, 180,000 BTU
Amazon.com
56
Free shipping
$1,091.16
Rinnai re180in Non-Condensing Natural Gas Tankless Water Heater, Up To 8.5 GPM, Indoor Installation, 180,000 BTU
Amazon.com
56
$667.49
Rinnai V53den Natural Gas Tankless Water Heater - 5.3 GPM, Outdoor Installation
Amazon.com
2K+
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$667.49
Rinnai V53den Natural Gas Tankless Water Heater - 5.3 GPM, Outdoor Installation
Amazon.com
2K+
$755.76
Performance Plus 7.0 GPM Non-Condensing Indoor Natural Gas Tankless Water Heater
Home Depot
160
Free shipping
$755.76
Performance Plus 7.0 GPM Non-Condensing Indoor Natural Gas Tankless Water Heater
Home Depot
160
$145.99
VEVOR Gas Tankless Water Heater 4.3Gal Indoor 100000 Btu Instant Hot Water Heater Smart Temperature Control & Clear Led Display & Multiple Security
VEVOR
$145.99
VEVOR Gas Tankless Water Heater 4.3Gal Indoor 100000 Btu Instant Hot Water Heater Smart Temperature Control & Clear Led Display & Multiple Security
VEVOR
$447.30
Rheem 18Kw 240V Tankless Electric Water Heater, Gray
Amazon.com
Free shipping
$447.30
Rheem 18Kw 240V Tankless Electric Water Heater, Gray
Amazon.com
Free shipping
$299.99
VEVOR Gas Tankless Water Heater 5.3Gal Outdoor 120000 Btu Instant Hot Water Heater Smart Temperature Control & 3/4 Inch Npt Interface& Multiple
VEVOR
$299.99
VEVOR Gas Tankless Water Heater 5.3Gal Outdoor 120000 Btu Instant Hot Water Heater Smart Temperature Control & 3/4 Inch Npt Interface& Multiple
VEVOR
$369.99
Electric Tankless Water Heater WINTEMP 27Kw 240V, Whole House Hot Water Supply, On Demand Instant Endless Water Heater, With LED Temperature Display,
Amazon.com
59
Free shipping
$369.99
Electric Tankless Water Heater WINTEMP 27Kw 240V, Whole House Hot Water Supply, On Demand Instant Endless Water Heater, With LED Temperature Display,
Amazon.com
59
$1,060.00
Rinnai cu160in Commercial Natural Gas Condensing Tankless Water Heater, Indoor Installation, 9 GPM
Amazon.com
49
Free shipping
$1,060.00
Rinnai cu160in Commercial Natural Gas Condensing Tankless Water Heater, Indoor Installation, 9 GPM
Amazon.com
49
$1,659.99
Rheem RTGH-95DVLP-2 Tankless Water Heater, Grey, Grey
Amazon.com
Free shipping
$1,659.99
Rheem RTGH-95DVLP-2 Tankless Water Heater, Grey, Grey
Amazon.com
Free shipping
$99,200.00
NRC711 157,000 BTU Direct Vent Condensing Residential Tankless Water Heater (NG)
MyTanklesswaterHeater
36
Free shipping
$99,200.00
NRC711 157,000 BTU Direct Vent Condensing Residential Tankless Water Heater (NG)
MyTanklesswaterHeater
36
$394.99
VEVOR Gas Tankless Water Heater 8Gal Outdoor 191000 Btu Instant Hot Water Heater Smart Temperature Control & 3/4 Inch Npt Interface& Multiple
VEVOR
3
$394.99
VEVOR Gas Tankless Water Heater 8Gal Outdoor 191000 Btu Instant Hot Water Heater Smart Temperature Control & 3/4 Inch Npt Interface& Multiple
VEVOR
3
$1,280.79
Rinnai Re199ip Non-Condensing Propane Tankless Water Heater, Up To 9.8 GPM, Indoor Installation, 199,000 BTU
Amazon.com
Free shipping
$1,280.79
Rinnai Re199ip Non-Condensing Propane Tankless Water Heater, Up To 9.8 GPM, Indoor Installation, 199,000 BTU
Amazon.com
Free shipping
$649.99
$779.95
Furrion Tankless Gas Water Heater With Antifreeze Protection- 2.4GPM, White
Amazon.com
Free shipping
16% off
$649.99
$779.95
Furrion Tankless Gas Water Heater With Antifreeze Protection- 2.4GPM, White
Amazon.com
Free shipping
$349.99
CAMPLUX Climatech 3 Tankless Water Heater Gas Indoor 3.6 GPM, 82,000 BTU Instant On-Demand Natural Gas Water Heater, High Efficiency Instant Hot Water
Amazon.com
568
Free shipping
$349.99
CAMPLUX Climatech 3 Tankless Water Heater Gas Indoor 3.6 GPM, 82,000 BTU Instant On-Demand Natural Gas Water Heater, High Efficiency Instant Hot Water
Amazon.com
568
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Shop Best Whole House Gas Tankless Water Heaters 2021

Sponsored
About our ads
$1,498.64
Rheem RTGH-95DVLN-3 RTGH Series 9.5 GPM 199,900 BTU 120 Volt Residential Indoor Natural Gas Tankless Water Heater Stainless Steel
Amazon.com
15
Free shipping
$1,498.64
Rheem RTGH-95DVLN-3 RTGH Series 9.5 GPM 199,900 BTU 120 Volt Residential Indoor Natural Gas Tankless Water Heater Stainless Steel
Amazon.com
15
$1,529.00
Rheem IKONIC rectgh-sr84in Professional Grade Super High Efficiency Condensing Tankless Natural Gas Water Heater With Recirculation, 8.4 GPM
Amazon.com
1
Free shipping
$1,529.00
Rheem IKONIC rectgh-sr84in Professional Grade Super High Efficiency Condensing Tankless Natural Gas Water Heater With Recirculation, 8.4 GPM
Amazon.com
1
$1,240.47
Rheem RRTGH84DVLN3701171 Rheem RTGH Series 8.4 GPM 157,000 BTU 120 Volt Residential Indoor Natural Gas Tankless Water Heater Stainless Steel
Amazon.com
14
Free shipping
$1,240.47
Rheem RRTGH84DVLN3701171 Rheem RTGH Series 8.4 GPM 157,000 BTU 120 Volt Residential Indoor Natural Gas Tankless Water Heater Stainless Steel
Amazon.com
14
$1,773.00
Navien NPE-210A2 180,000 BTU Condensing Premium Gas Tankless Water Heater
MyTanklesswaterHeater
Free shipping
$1,773.00
Navien NPE-210A2 180,000 BTU Condensing Premium Gas Tankless Water Heater
MyTanklesswaterHeater
Free shipping
$1,351.99
Rheem RRTGH95DVLP3701178 Rheem RTGH Series 9.5 GPM 199,900 BTU 120 Volt Residential Indoor Liquid Propane Tankless Water Heater Stainless Steel
Amazon.com
43
Free shipping
$1,351.99
Rheem RRTGH95DVLP3701178 Rheem RTGH Series 9.5 GPM 199,900 BTU 120 Volt Residential Indoor Liquid Propane Tankless Water Heater Stainless Steel
Amazon.com
43
$1,645.55
NEW Rinnai rx199in Condensing Smart Sense Natural Gas Or Propane Tankless Water Heater, Indoor Or Outdoor Water Heater, Up To 11.1 GPM, 199,000 BTU
Amazon.com
128
Free shipping
$1,645.55
NEW Rinnai rx199in Condensing Smart Sense Natural Gas Or Propane Tankless Water Heater, Indoor Or Outdoor Water Heater, Up To 11.1 GPM, 199,000 BTU
Amazon.com
128
$935.67
Rheem RTG-95DVLN-3 High Efficiency Non-Condensing Indoor Tankless Natural Gas Water Heater 9.5 GPM, 199,900 Btus
Amazon.com
116
Free shipping
24% off
$935.67
Rheem RTG-95DVLN-3 High Efficiency Non-Condensing Indoor Tankless Natural Gas Water Heater 9.5 GPM, 199,900 Btus
Amazon.com
116
$750.00
$804.00
Rheem RTG-70XLN-3 High Efficiency Non-Condensing Outdoor Tankless Natural Gas Water Heater, 7.0 GPM, Gray
Amazon.com
74
Free shipping
$750.00
$804.00
Rheem RTG-70XLN-3 High Efficiency Non-Condensing Outdoor Tankless Natural Gas Water Heater, 7.0 GPM, Gray
Amazon.com
74
$1,108.88
Rheem Natural Gas Condensing Tankless Water Heater Indoor Up To 9 GPM, 180,000 Btus Continuous Super High Efficient Hot Water
Amazon.com
15
Free shipping
$1,108.88
Rheem Natural Gas Condensing Tankless Water Heater Indoor Up To 9 GPM, 180,000 Btus Continuous Super High Efficient Hot Water
Amazon.com
15
$1,736.20
Rheem Prestige Condensing Tankless Gas Indoor Natural Gas Water Heater With Built-In Recirculation 11.0 GPM - RTGH-RH11DVLN
Amazon.com
Free shipping
$1,736.20
Rheem Prestige Condensing Tankless Gas Indoor Natural Gas Water Heater With Built-In Recirculation 11.0 GPM - RTGH-RH11DVLN
Amazon.com
Free shipping
$1,199.73
Rheem RTG-95XELP-3 High Efficiency Non-Condensing Outdoor Tankless Liquid Propane Water Heater 9.5 GPM With Wifi, 199,900 Btus
Amazon.com
60
Free shipping
13% off
$1,199.73
Rheem RTG-95XELP-3 High Efficiency Non-Condensing Outdoor Tankless Liquid Propane Water Heater 9.5 GPM With Wifi, 199,900 Btus
Amazon.com
60
$1,224.97
Rheem RTG-95DVLP-3 High Efficiency Non-Condensing Indoor Tankless Liquid Propane Water Heater 9.5 GPM, 199,900 Btus
Amazon.com
1
Free shipping
$1,224.97
Rheem RTG-95DVLP-3 High Efficiency Non-Condensing Indoor Tankless Liquid Propane Water Heater 9.5 GPM, 199,900 Btus
Amazon.com
1
$472.90
GASLAND Gasmart C 6.86 GPM Natural Gas Tankless Water Heater, Up To 199,000 BTU,CSA Certified Whole House Indoor Installation Residential On Demand
Amazon.com
131
Free shipping
$472.90
GASLAND Gasmart C 6.86 GPM Natural Gas Tankless Water Heater, Up To 199,000 BTU,CSA Certified Whole House Indoor Installation Residential On Demand
Amazon.com
131
$795.69
Rinnai Re140en Non-Condensing Natural Gas Tankless Water Heater, Up To 5.3 GPM, Outdoor Installation, 140,000 BTU
Amazon.com
81
Free shipping
$795.69
Rinnai Re140en Non-Condensing Natural Gas Tankless Water Heater, Up To 5.3 GPM, Outdoor Installation, 140,000 BTU
Amazon.com
81
$553.99
191000 BTU Gas Tankless Water Heater, 8 Gal. Instant Hot Water, Smart Control, 3/4 in. NPT, Safety For Whole House
Home Depot
Free shipping
$553.99
191000 BTU Gas Tankless Water Heater, 8 Gal. Instant Hot Water, Smart Control, 3/4 in. NPT, Safety For Whole House
Home Depot
Free shipping
$1,752.80
Rinnai cx199in Condensing Smart Sense Commercial Natural Gas Or Propane Tankless Water Heater, 199,000 BTU, 11.1 GPM
Amazon.com
2
Free shipping
$1,752.80
Rinnai cx199in Condensing Smart Sense Commercial Natural Gas Or Propane Tankless Water Heater, 199,000 BTU, 11.1 GPM
Amazon.com
2
$319.17
$399.00
Ranein Natural Gas Tankless Water Heater With Vent Pipe, Indoor Max 4.3 GPM, 100,000 BTU Instant Hot Water Heater
Amazon.com
501
Free shipping
20% off
$319.17
$399.00
Ranein Natural Gas Tankless Water Heater With Vent Pipe, Indoor Max 4.3 GPM, 100,000 BTU Instant Hot Water Heater
Amazon.com
501
$1,091.16
Rinnai Re180en Non-Condensing Natural Gas Tankless Water Heater, Up To 8.5 GPM, Outdoor Installation, 180,000 BTU
Amazon.com
71
Free shipping
$1,091.16
Rinnai Re180en Non-Condensing Natural Gas Tankless Water Heater, Up To 8.5 GPM, Outdoor Installation, 180,000 BTU
Amazon.com
71