Question: what is the best tankless water heater on the market?
Answer: EcoSmart ECO 27 Electric Tankless Water Heater. ...  Stiebel Eltron Electric Tankless Water Heater. ...  Bosch Tronic 3000 Point-of-Use Electric Tankless Water Heater. ...  Rinnai V Series HE Natural Gas Tankless Water Heater. ...  EcoSmart ECO 11 Electric Tankless Water Heater.