Updated October 2026
Tankless Water Heater Rankings 2026
6 rankings built from 78 rated tankless water heaters, using the exact listing and its review record. Each card shows the #1 of its ranking.
Shopping by fuel or by feature? See the best gas tankless water heaters (natural gas and propane), the best electric tankless water heaters, the best propane tankless water heaters for an outside wall, the best high-efficiency tankless water heaters and the best whole-house tankless water heaters.
Gas tankless water heaters
#1: MIZUDO 199,000 BTU Natural Gas Indoor · 9.2/10Best Tankless Water Heaters in 20265 models ranked
#1: FOGATTI Outdoor Propane Tankless · 9.1/10Best Outdoor Propane Tankless Water Heaters in 20265 models ranked
#1: Rinnai RU199iN Condensing · 9.1/10Best High-Efficiency Condensing Tankless Water Heaters in 20265 models ranked#1: MIZUDO 199,000 BTU Natural Gas Indoor · 9.2/10Best Gas Tankless Water Heaters in 20265 models ranked