The 9 Best Tankless Water Heaters of 2021

By The Spruce
Rinnai RL Series HE+ Tankless Hot Water Heater
"Best Overall, Natural Gas"
Rheem Performance 7.03 GPM Tankless Electric Water Heater
"Best Overall, Electric"
EcoSmart ECO 18 Tankless Electric Water Heater
"Best Budget"
Bosch Tronic 3000
"Runner Up, Best Budget"
Takagi T-H3-DV-N Condensing Natural Gas Tankless Water Heater
"Best Splurge"
Rianni Super HE+ 11 GPM 199,000 BTU Natural Gas Tankless Water Heater
"Best for Large Families"
Ecosmart ECO 11 Electric Tankless Water Heater
"Best for Small Homes"
Rinnai V53DeN Outdoor Tankless Water Heater
"Best Outdoor"
CAMPLUX ENJOY OUTDOOR LIFE Outdoor Portable Propane Tankless Water Heater
"Best Portable"
CAMPLUX 5L 1.32 GPM Outdoor Portable Propane Tankless Water Heater
"Best Portable"