156 complete heaters, 70 service parts and kits
All tankless water heaters compared (2026), page 8 of 10
Reviews 169 to 192 of 226, still sorted by our rating. This page opens with the Bosch Tronic 4000, 8.5 kW at 6.5/10.
24 products
No product matches these filters.
Product images: Amazon listings
Related rankings
#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: Rheem 18 kW Electric, 240V · 9.3/10Best Whole-House Electric 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
#1: MIZUDO 199,000 BTU Natural Gas Indoor · 9.2/10Best Whole-House Tankless Water Heaters in 2026: Gas and Electric5 models ranked





















