My 12-year-old Rheem tankless water heater had stopped putting out hot water the night before, so I called into the help desk ON A SATURDAY. My call was immediately picked up by a man (I believe ...

These heaters usually come with 28- 54-gallon tanks, and 30- 40-gallon options are quite common. Tankless water ... heater fuel and capacity, consider the brand, price, and warranty term. Rheem ...