The 5 tankless heaters we'd put in for the morning rushTop 5 tankless heaters → See the ranking
Compare models

104 products rated

Gas tankless water heaters compared (2026)

Natural gas and propane units, indoor, outdoor and portable. Sorted by rating; stated maximum flow, BTU/h input, fuel and mounting location as given in each exact listing.

Rating

104 products

9.2/10
MIZUDO 199,000 BTU Natural Gas Indoor
10.3 GPM · 199,000 BTU/h · 120 VMIZUDO 199,000 BTU Natural Gas Indoor$1,199 on Sep 30, 2026, may have changed307 buyer reviews
9.1/10
FOGATTI Outdoor Propane Tankless
120,000 BTU/h · 120 VFOGATTI Outdoor Propane Tankless$529.99 on Sep 30, 2026, may have changed166 buyer reviews
8.0/10
A. O. Smith 10 GPM Natural Gas Outdoor
10 GPM · 199,000 BTU/hA. O. Smith 10 GPM Natural Gas Outdoor$1,599.99 on Sep 30, 2026, may have changedSpec-based rating
7.9/10
Ranein 190,000 BTU Natural Gas Indoor
8.5 GPM · 190,000 BTU/hRanein 190,000 BTU Natural Gas Indoor$699 on Sep 30, 2026, may have changed710 buyer reviews
7.8/10
Rheem RTGH 9.5 GPM Propane Indoor
9.5 GPM · 199,900 BTU/hRheem RTGH 9.5 GPM Propane Indoor$1,383.15 on Sep 30, 2026, may have changedSpec-based rating
7.8/10
Rinnai RU199iN Condensing
11 GPMRinnai RU199iN CondensingSee current price388 buyer reviews
7.8/10
ThermoMate CZ422LP Propane Indoor
5 GPM · 113,000 BTU/h · 120 VThermoMate CZ422LP Propane Indoor$399.99 on Sep 30, 2026, may have changedSpec-based rating
7.7/10
Rheem RTG 8.4 GPM Natural Gas Outdoor
8.4 GPM · 180,000 BTU/hRheem RTG 8.4 GPM Natural Gas Outdoor$964.10 on Sep 30, 2026, may have changedSpec-based rating
7.7/10
ThermoMate Condensing Natural Gas
5.28 GPM · 114,000 BTU/h · 120 VThermoMate Condensing Natural Gas$559.99 on Sep 30, 2026, may have changedSpec-based rating
7.6/10
Marey 170,000 BTU Propane Indoor
7.5 GPM · 170,000 BTU/hMarey 170,000 BTU Propane Indoor$772.46 on Sep 30, 2026, may have changedSpec-based rating
7.6/10
MIZUDO 120,000 BTU Natural Gas
5.1 GPM · 120,000 BTU/hMIZUDO 120,000 BTU Natural Gas$539.99 on Sep 30, 2026, may have changedSpec-based rating
7.6/10
MIZUDO 120,000 BTU Propane
5.1 GPM · 120,000 BTU/hMIZUDO 120,000 BTU Propane$539.99 on Sep 30, 2026, may have changedSpec-based rating
7.6/10
Rheem RTG 7.0 GPM Natural Gas Outdoor
7 GPM · 160,000 BTU/hRheem RTG 7.0 GPM Natural Gas Outdoor$819.08 on Sep 30, 2026, may have changedSpec-based rating
7.6/10
Rheem RTG 8.4 GPM Propane Indoor
8.4 GPM · 180,000 BTU/hRheem RTG 8.4 GPM Propane Indoor$953 on Sep 30, 2026, may have changedSpec-based rating
7.6/10
ThermoMate Condensing Propane
5.28 GPM · 114,000 BTU/h · 120 VThermoMate Condensing Propane$559.99 on Sep 30, 2026, may have changedSpec-based rating
7.6/10
Westinghouse 120,000 BTU Propane Outdoor
5.1 GPM · 120,000 BTU/h · 120 VWestinghouse 120,000 BTU Propane Outdoor$799.99 on Sep 30, 2026, may have changed12 buyer reviews
7.5/10
Ranein 130,000 BTU Propane Outdoor
5.3 GPM · 130,000 BTU/hRanein 130,000 BTU Propane Outdoor$579 on Sep 30, 2026, may have changed710 buyer reviews
7.5/10
Rheem RTG 7.0 GPM Propane Indoor
7 GPM · 160,000 BTU/hRheem RTG 7.0 GPM Propane Indoor$785.13 on Sep 30, 2026, may have changedSpec-based rating
7.5/10
Rheem RTG 8.4 GPM Propane Outdoor
8.4 GPM · 180,000 BTU/hRheem RTG 8.4 GPM Propane Outdoor$953 on Sep 30, 2026, may have changedSpec-based rating
7.5/10
Westinghouse Natural Gas Outdoor
8.1 GPM · 180,000 BTU/h · 120 VWestinghouse Natural Gas Outdoor$799.96 on Sep 30, 2026, may have changedSpec-based rating
7.4/10
APUS 95,000 BTU Propane Indoor
4.42 GPM · 95,000 BTU/h · 120 VAPUS 95,000 BTU Propane Indoor$299.99 on Sep 30, 2026, may have changedSpec-based rating
7.4/10
GASLAND BE158B Propane, 1.58 GPM
1.58 GPMGASLAND BE158B Propane, 1.58 GPM$169.99 on Sep 30, 2026, may have changedSpec-based rating
7.4/10
Noritz NR98SVLP Indoor Propane
9.8 GPM · 199,900 BTU/hNoritz NR98SVLP Indoor Propane$1,590.70 on Sep 30, 2026, may have changedSpec-based rating
7.4/10
Ranein Condensing Natural Gas, 5.1 GPM
5.1 GPM · 120,000 BTU/h · 120 VRanein Condensing Natural Gas, 5.1 GPM$559 on Sep 30, 2026, may have changedSpec-based rating
7.4/10
Ranein Condensing Propane, 5.1 GPM
5.1 GPM · 120,000 BTU/h · 120 VRanein Condensing Propane, 5.1 GPM$559 on Sep 30, 2026, may have changedSpec-based rating
7.3/10
CAMPLUX 5L Portable Propane, 1.32 GPM
1.32 GPMCAMPLUX 5L Portable Propane, 1.32 GPM$151.99 on Sep 30, 2026, may have changedSpec-based rating
7.3/10
Eccotemp Luxé EL7 Portable, 1.85 GPM
1.85 GPMEccotemp Luxé EL7 Portable, 1.85 GPM$303.22 on Sep 30, 2026, may have changedSpec-based rating
7.3/10
LiberLive 130,000 BTU NG Outdoor, Gray
5.3 GPM · 130,000 BTU/h · 110 VLiberLive 130,000 BTU NG Outdoor, Gray$429.99 on Sep 30, 2026, may have changedSpec-based rating
7.3/10
LiberLive 130,000 BTU NG Outdoor, White
5.3 GPM · 130,000 BTU/h · 110 VLiberLive 130,000 BTU NG Outdoor, White$419.99 on Sep 30, 2026, may have changedSpec-based rating
7.3/10
Konfino 190,000 BTU Natural Gas Outdoor
8.1 GPM · 190,000 BTU/h · 120 VKonfino 190,000 BTU Natural Gas Outdoor$529.79 on Sep 30, 2026, may have changedSpec-based rating
7.3/10
Amzgachfktch 1.58 GPM Portable Propane
1.58 GPM · 40,000 BTU/hAmzgachfktch 1.58 GPM Portable Propane$103.99 on Sep 30, 2026, may have changedSpec-based rating
7.3/10
LiberLive 5L Portable Propane, 1.32 GPM
1.32 GPM · 34,000 BTU/hLiberLive 5L Portable Propane, 1.32 GPM$119.69 on Sep 30, 2026, may have changedSpec-based rating
7.3/10
Rheem RTGH 8.4 GPM Natural Gas Indoor
8.4 GPM · 157,000 BTU/hRheem RTGH 8.4 GPM Natural Gas Indoor$1,168.99 on Sep 30, 2026, may have changed60 buyer reviews
7.3/10
Rinnai REP199eN Smart-Circ
7.6 GPMRinnai REP199eN Smart-Circ$1,381.59 on Sep 30, 2026, may have changedSpec-based rating
7.2/10
Novieex 100,000 BTU Propane Indoor
4.3 GPM · 100,000 BTU/h · 110 VNovieex 100,000 BTU Propane Indoor$269.98 on Sep 30, 2026, may have changedSpec-based rating
7.2/10
Rheem RTG 9.5 GPM Natural Gas Indoor
9.5 GPM · 199,900 BTU/hRheem RTG 9.5 GPM Natural Gas Indoor$1,047.92 on Sep 30, 2026, may have changed88 buyer reviews
7.2/10
Vancepic Condensing Natural Gas Indoor
5.1 GPM · 120,000 BTU/hVancepic Condensing Natural Gas Indoor$499 on Sep 30, 2026, may have changed2 buyer reviews
7.2/10
Vancepic 110,000 BTU Natural Gas Indoor
4.8 GPM · 110,000 BTU/hVancepic 110,000 BTU Natural Gas Indoor$329.99 on Sep 30, 2026, may have changed2 buyer reviews
7.1/10
CAMPLUX 1.58 GPM Portable with Pump Kit
CAMPLUX 1.58 GPM Portable with Pump Kit$239.99 on Sep 30, 2026, may have changedSpec-based rating
7.1/10
Eccotemp SMARTHOME Natural Gas, 6.8 GPM
6.8 GPM · 140,000 BTU/hEccotemp SMARTHOME Natural Gas, 6.8 GPM$699 on Sep 30, 2026, may have changed3 buyer reviews
7.1/10
Ranein 80,000 BTU Propane Indoor
3.6 GPM · 80,000 BTU/hRanein 80,000 BTU Propane Indoor$299 on Sep 30, 2026, may have changedSpec-based rating
7.1/10
Ranein 100,000 BTU Propane Indoor
4.3 GPM · 100,000 BTU/hRanein 100,000 BTU Propane Indoor$399 on Sep 30, 2026, may have changedSpec-based rating
7.1/10
Rheem RTGH-95DVLN-3 Natural Gas Indoor
9.5 GPM · 199,900 BTU/h · 120 VRheem RTGH-95DVLN-3 Natural Gas Indoor$1,454.31 on Sep 30, 2026, may have changed62 buyer reviews
7.1/10
Rinnai RE140eN Non-Condensing
5.3 GPMRinnai RE140eN Non-Condensing$795.69 on Sep 30, 2026, may have changedSpec-based rating
7.1/10
Rinnai RE160eP Non-Condensing
6.1 GPMRinnai RE160eP Non-Condensing$893.34 on Sep 30, 2026, may have changed5 buyer reviews
7.1/10
Rinnai RE180eP Non-Condensing
6.9 GPMRinnai RE180eP Non-Condensing$1,091.16 on Sep 30, 2026, may have changed9 buyer reviews
7.1/10
Rinnai RE180iN Non-Condensing
6.9 GPMRinnai RE180iN Non-Condensing$1,091.16 on Sep 30, 2026, may have changed16 buyer reviews
7.1/10
Rinnai RE180iP Non-Condensing
8.5 GPMRinnai RE180iP Non-Condensing$1,091.16 on Sep 30, 2026, may have changedSpec-based rating
7.1/10
Rinnai RE199eN Non-Condensing
7.6 GPMRinnai RE199eN Non-Condensing$1,280.79 on Sep 30, 2026, may have changedSpec-based rating
7.1/10
Rinnai RE199eP Non-Condensing
7.6 GPMRinnai RE199eP Non-Condensing$1,280.79 on Sep 30, 2026, may have changed12 buyer reviews
7.1/10
Vancepic 100,000 BTU Natural Gas Indoor
4.3 GPM · 100,000 BTU/hVancepic 100,000 BTU Natural Gas Indoor$259.99 on Sep 30, 2026, may have changedSpec-based rating
7.0/10
VELPAX 20L Natural Gas Outdoor
5.26 GPM · 120,000 BTU/h · 120 VVELPAX 20L Natural Gas Outdoor$279.99 on Sep 30, 2026, may have changedSpec-based rating
7.0/10
VELPAX 110,000 BTU Natural Gas Outdoor
4.76 GPM · 110,000 BTU/h · 110 VVELPAX 110,000 BTU Natural Gas Outdoor$349.99 on Sep 30, 2026, may have changedSpec-based rating
7.0/10
VELPAX 110,000 BTU Propane Outdoor
4.76 GPM · 110,000 BTU/h · 110 VVELPAX 110,000 BTU Propane Outdoor$349.99 on Sep 30, 2026, may have changedSpec-based rating
7.0/10
STPFFOT 130,000 BTU Propane Outdoor
5.2 GPM · 130,000 BTU/hSTPFFOT 130,000 BTU Propane Outdoor$419.99 on Sep 30, 2026, may have changed2 buyer reviews
7.0/10
Rheem RTG 7.0 GPM Natural Gas Indoor
7 GPM · 160,000 BTU/hRheem RTG 7.0 GPM Natural Gas Indoor$653.77 on Sep 30, 2026, may have changed65 buyer reviews
7.0/10
Rinnai RE140eP Non-Condensing
5.3 GPMRinnai RE140eP Non-CondensingSee current price13 buyer reviews
7.0/10
Rinnai RE140iP Non-Condensing
5.3 GPMRinnai RE140iP Non-Condensing$795.69 on Sep 30, 2026, may have changedSpec-based rating
7.0/10
Rinnai RE180eN Non-Condensing
6.9 GPMRinnai RE180eN Non-Condensing$1,091.16 on Sep 30, 2026, may have changedSpec-based rating
7.0/10
Rinnai RE199iP Non-Condensing
7.6 GPMRinnai RE199iP Non-Condensing$1,280.79 on Sep 30, 2026, may have changedSpec-based rating
7.0/10
Rinnai RUCS65IP Propane
6.5 GPMRinnai RUCS65IP Propane$849 on Sep 30, 2026, may have changedSpec-based rating
7.0/10
Amzgachfktch 4.75 GPM Natural Gas
4.75 GPM · 102,000 BTU/h · 120 VAmzgachfktch 4.75 GPM Natural Gas$189.99 on Sep 30, 2026, may have changedSpec-based rating
6.9/10
APUS 190,000 BTU Propane Outdoor
8.1 GPM · 190,000 BTU/h · 120 VAPUS 190,000 BTU Propane Outdoor$629.99 on Sep 30, 2026, may have changed102 buyer reviews
6.9/10
Eccotemp i12-LP Propane Indoor
110 VEccotemp i12-LP Propane IndoorSee current priceSpec-based rating
6.9/10
GASLAND Gasmart E 199,000 BTU
7.6 GPM · 199,000 BTU/hGASLAND Gasmart E 199,000 BTU$629.99 on Sep 30, 2026, may have changed63 buyer reviews
6.9/10
Ranein 190,000 BTU Natural Gas Outdoor
8.5 GPM · 190,000 BTU/hRanein 190,000 BTU Natural Gas Outdoor$699 on Sep 30, 2026, may have changedSpec-based rating
6.9/10
Ranein 190,000 BTU Propane Indoor
8.5 GPM · 190,000 BTU/hRanein 190,000 BTU Propane Indoor$699 on Sep 30, 2026, may have changedSpec-based rating
6.8/10
APUS 95,000 BTU Natural Gas Indoor
4.42 GPM · 95,000 BTU/h · 120 VAPUS 95,000 BTU Natural Gas Indoor$299.99 on Sep 30, 2026, may have changed141 buyer reviews
6.8/10
CAMPLUX 150,000 BTU Propane Outdoor
6.4 GPM · 150,000 BTU/hCAMPLUX 150,000 BTU Propane Outdoor$629.99 on Sep 30, 2026, may have changed76 buyer reviews
6.8/10
Noritz NR98-OD Natural Gas Outdoor
7.5 GPM · 199,000 BTU/hNoritz NR98-OD Natural Gas Outdoor$2,035.95 on Sep 30, 2026, may have changedSpec-based rating
6.8/10
Rinnai RX160iN Condensing Smart Sense
9 GPMRinnai RX160iN Condensing Smart Sense$1,442.70 on Sep 30, 2026, may have changed70 buyer reviews
6.8/10
ThermoMate CZ422NG Natural Gas Indoor
5 GPM · 113,000 BTU/h · 120 VThermoMate CZ422NG Natural Gas Indoor$399.99 on Sep 30, 2026, may have changed161 buyer reviews
6.8/10
VEVOR 100,000 BTU Propane (5.3 Gal)
100,000 BTU/hVEVOR 100,000 BTU Propane (5.3 Gal)$280.46 on Sep 30, 2026, may have changed57 buyer reviews
6.7/10
APUS 140,000 BTU Natural Gas Indoor
6.8 GPM · 140,000 BTU/h · 120 VAPUS 140,000 BTU Natural Gas Indoor$559.99 on Sep 30, 2026, may have changed102 buyer reviews
6.7/10
APUS 80,000 BTU Natural Gas Indoor
3.6 GPM · 80,000 BTU/h · 120 VAPUS 80,000 BTU Natural Gas Indoor$249.99 on Sep 30, 2026, may have changed141 buyer reviews
6.7/10
forimo 18L Natural Gas, 4.74 GPM
4.74 GPM · 81,888 BTU/hforimo 18L Natural Gas, 4.74 GPM$219.99 on Sep 30, 2026, may have changed19 buyer reviews
6.7/10
Rheem RTG 7.0 GPM Propane Outdoor
7 GPM · 160,000 BTU/hRheem RTG 7.0 GPM Propane Outdoor$770.17 on Sep 30, 2026, may have changed55 buyer reviews
6.6/10
CAMPLUX BW158B Portable, 1.58 GPM
1.58 GPM · 41,000 BTU/hCAMPLUX BW158B Portable, 1.58 GPM$169.99 on Sep 30, 2026, may have changedSpec-based rating
6.6/10
Rinnai RUCS75iN Natural Gas
7.5 GPMRinnai RUCS75iN Natural Gas$892.24 on Sep 30, 2026, may have changed91 buyer reviews
6.5/10
Noritz NR98SVNG Natural Gas
7.5 GPMNoritz NR98SVNG Natural Gas$1,815.58 on Sep 30, 2026, may have changed12 buyer reviews
6.5/10
Rinnai RE199iN Non-Condensing
9.8 GPM · 199,000 BTU/hRinnai RE199iN Non-Condensing$1,280.79 on Sep 30, 2026, may have changed41 buyer reviews
6.5/10
Rinnai RX130iN Condensing Smart Sense
7.1 GPMRinnai RX130iN Condensing Smart Sense$1,264.20 on Sep 30, 2026, may have changed46 buyer reviews
6.4/10
Baococo 18L Propane, 4.76 GPM
4.76 GPM · 115,425 BTU/hBaococo 18L Propane, 4.76 GPM$149.99 on Sep 30, 2026, may have changedSpec-based rating
6.4/10
Takagi T-H3S-OS-N Condensing Outdoor
8 GPMTakagi T-H3S-OS-N Condensing Outdoor$1,355.95 on Sep 30, 2026, may have changedSpec-based rating
6.4/10
Takagi T-H3S-OS-P Condensing Propane
8 GPMTakagi T-H3S-OS-P Condensing Propane$1,425 on Sep 30, 2026, may have changedSpec-based rating
6.4/10
VEVOR 100,000 BTU Propane (4.3 Gal)
100,000 BTU/hVEVOR 100,000 BTU Propane (4.3 Gal)$169.90 on Sep 30, 2026, may have changedSpec-based rating
6.2/10
Noritz NR50ODLP Outdoor Propane
5 GPM · 120,000 BTU/hNoritz NR50ODLP Outdoor Propane$677.68 on Sep 30, 2026, may have changed11 buyer reviews
6.2/10
Noritz NR66ODLP Outdoor Propane
6.6 GPM · 140,000 BTU/hNoritz NR66ODLP Outdoor Propane$1,130.34 on Sep 30, 2026, may have changed5 buyer reviews
6.0/10
Rinnai RUCS65IN Natural Gas
6.5 GPMRinnai RUCS65IN Natural Gas$849 on Sep 30, 2026, may have changed62 buyer reviews
5.7/10
Novieex 100,000 BTU Natural Gas Indoor
4.3 GPM · 100,000 BTU/h · 110 VNovieex 100,000 BTU Natural Gas Indoor$269.97 on Sep 30, 2026, may have changed45 buyer reviews
5.5/10
Rheem RTGH 9.0 GPM Natural Gas Indoor
9 GPM · 180,000 BTU/hRheem RTGH 9.0 GPM Natural Gas Indoor$1,219.99 on Sep 30, 2026, may have changed30 buyer reviews
5.5/10
Westinghouse 180,000 BTU Propane Outdoor
8.1 GPM · 180,000 BTU/h · 120 VWestinghouse 180,000 BTU Propane Outdoor$799.98 on Sep 30, 2026, may have changed34 buyer reviews
5.4/10
Rinnai RXP160iN Condensing Smart Sense
9 GPMRinnai RXP160iN Condensing Smart Sense$1,685.60 on Sep 30, 2026, may have changed34 buyer reviews
4.9/10
Ranein 18L Propane Outdoor, 85,300 BTU
4.74 GPM · 85,300 BTU/hRanein 18L Propane Outdoor, 85,300 BTU$288.15 on Sep 30, 2026, may have changed34 buyer reviews
4.7/10
Ranein 12L Propane Outdoor, 68,000 BTU
3.18 GPM · 68,000 BTU/hRanein 12L Propane Outdoor, 68,000 BTU$239 on Sep 30, 2026, may have changed34 buyer reviews
4.7/10
Rinnai SENSEI CX199iN Commercial
11.1 GPM · 199,000 BTU/hRinnai SENSEI CX199iN Commercial$1,752.80 on Sep 30, 2026, may have changed21 buyer reviews
4.6/10
VELPAX 20L Propane Outdoor
5.26 GPM · 120,000 BTU/h · 120 VVELPAX 20L Propane Outdoor$269.99 on Sep 30, 2026, may have changed37 buyer reviews
4.5/10
SNDOAS 4.23 GPM Natural Gas, White
4.23 GPM · 120 VSNDOAS 4.23 GPM Natural Gas, WhiteSee current price34 buyer reviews
4.5/10
SNDOAS 4.23 GPM Natural Gas, Black
4.23 GPM · 120 VSNDOAS 4.23 GPM Natural Gas, BlackSee current price34 buyer reviews
4.5/10
Takagi T-H3S-DV-N Condensing Indoor
8 GPMTakagi T-H3S-DV-N Condensing IndoorSee current price25 buyer reviews
4.4/10
Rheem Prestige Condensing Natural Gas
11 GPMRheem Prestige Condensing Natural Gas$1,199.99 on Sep 30, 2026, may have changed27 buyer reviews
4.1/10
Novieex 120,000 BTU Propane Outdoor
5.3 GPM · 120,000 BTU/h · 110 VNovieex 120,000 BTU Propane Outdoor$499.99 on Sep 30, 2026, may have changed20 buyer reviews
3.9/10
Noritz NRC71DVNG Condensing Natural Gas
7.1 GPMNoritz NRC71DVNG Condensing Natural Gas$1,330.28 on Sep 30, 2026, may have changed21 buyer reviews
3.9/10
Rinnai RE140iN Non-Condensing
5.3 GPMRinnai RE140iN Non-Condensing$795.69 on Sep 30, 2026, may have changed26 buyer reviews

Product images: Amazon listings

Related rankings

All rankings →
MIZUDO 199,000 BTU Natural Gas Indoor#1: MIZUDO 199,000 BTU Natural Gas Indoor · 9.2/10Best Tankless Water Heaters in 20265 models rankedFOGATTI Outdoor Propane Tankless#1: FOGATTI Outdoor Propane Tankless · 9.1/10Best Outdoor Propane Tankless Water Heaters in 20265 models rankedRheem 18 kW Electric, 240V#1: Rheem 18 kW Electric, 240V · 9.3/10Best Whole-House Electric Tankless Water Heaters in 20265 models rankedRinnai RU199iN Condensing#1: Rinnai RU199iN Condensing · 9.1/10Best High-Efficiency Condensing Tankless Water Heaters in 20265 models rankedMIZUDO 199,000 BTU Natural Gas Indoor#1: MIZUDO 199,000 BTU Natural Gas Indoor · 9.2/10Best Gas Tankless Water Heaters in 20265 models rankedMIZUDO 199,000 BTU Natural Gas Indoor#1: MIZUDO 199,000 BTU Natural Gas Indoor · 9.2/10Best Whole-House Tankless Water Heaters in 2026: Gas and Electric5 models ranked

Keep comparing

Electric tankless water heaters →Service kits, valves & parts →