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

156 complete heaters, 70 service parts and kits

All tankless water heaters compared (2026), page 7 of 10

Reviews 145 to 168 of 226, still sorted by our rating. This page opens with the ThermoMate CZ422NG Natural Gas Indoor at 6.8/10.

Category
Rating

24 products

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
Vancepic 18 kW Electric, 240V
18 kW · 240 VVancepic 18 kW Electric, 240V$329 on Sep 30, 2026, may have changed19 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
Lounsweer Neutralizer Kit (804000074)
Lounsweer Neutralizer Kit (804000074)$64.99 on Sep 30, 2026, may have changedSpec-based rating
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
Urubize Neutralizer Kit (804000074)
Urubize Neutralizer Kit (804000074)$66.48 on Sep 30, 2026, may have changedSpec-based rating
6.7/10
DiversiTech HVENT2 2" Vent Termination
DiversiTech HVENT2 2" Vent Termination$41.15 on Sep 30, 2026, may have changedSpec-based rating
6.7/10
Hourleey 3/4" IPS Service Valve Kit
Hourleey 3/4" IPS Service Valve Kit$49.99 on Sep 30, 2026, may have changedSpec-based rating
6.7/10
Janhemei 3/4" IPS Valve Kit
Janhemei 3/4" IPS Valve Kit$43.68 on Sep 30, 2026, may have changedSpec-based rating
6.7/10
LIULO TOOL 3/4" IPS Service Valve Kit
LIULO TOOL 3/4" IPS Service Valve Kit$47.49 on Sep 30, 2026, may have changedSpec-based rating
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 RTEX-13, 240V
3.17 GPM · 240 VRheem RTEX-13, 240VSee current priceSpec-based rating
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
6.7/10
Roastove Water Heater Installation Kit
Roastove Water Heater Installation Kit$29.97 on Sep 30, 2026, may have changedSpec-based rating
6.7/10
Safetech Flushing Kit, 5-Gallon Lid
Safetech Flushing Kit, 5-Gallon Lid$158.67 on Sep 30, 2026, may have changedSpec-based rating
6.7/10
HNK 3,500 W Electric, 110V
110 VHNK 3,500 W Electric, 110V$139.98 on Sep 30, 2026, may have changedSpec-based rating
6.6/10
Bosch Tronic 6100, 27 kW
27 kWBosch Tronic 6100, 27 kW$636.60 on Sep 30, 2026, may have changedSpec-based rating
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
Long Term 3/4" IPS Service Valve Kit
Long Term 3/4" IPS Service Valve Kit$45.99 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
6.6/10
Wosijm SP20285 Vent Termination Kit
Wosijm SP20285 Vent Termination KitSee current priceSpec-based rating
6.5/10
Bosch Tronic 4000, 10.5 kW
10.5 kWBosch Tronic 4000, 10.5 kW$229.59 on Sep 30, 2026, may have changedSpec-based rating
6.5/10
Bosch Tronic 4000, 6.5 kW
6.5 kWBosch Tronic 4000, 6.5 kW$247.99 on Sep 30, 2026, may have changedSpec-based rating

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

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