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Tankless Water Heater vs. Traditional Water Heater



A tankless water heater provides a continuous supply of hot water from an energy-efficient and space-saving design. It is about the size of a medicine cabinet. Rheem has a wide variety of solutions for tankless water heating needs.

Benefits of a tankless water heater

  • A typical tankless water heater measures less than 15″ wide by just 2 feetrheem tankless water heater high. It can be mounted on an interior or exterior wall. A typical tank water heater takes up about 9 square feet.
  • A tankless water heater weighs as little as 50 pounds. A typical gas water heater weighs 165 pounds or more
  • A Rheem tankless water heater will consume about 20-25% less in fuel costs than a typical gas fired tank type water heater.
  • Tankless water heaters only heat the amount of hot water necessary to meet the demand. A tank type water heater heats the ENTIRE contents of the storage tank to meet large OR small demands.
  • The national life expectancy for tankless water heaters is 20 years. For tank type water heaters, the expectancy is 12 years.

Standard features on all Rheem models

  • Low activation flow rates – 0.40 GPM* minimum activation flow rate and 0.26 GPM minimum flow rate. Compatible with low-flow faucets and shower heads. (*GPM = Gallons Per Minute)
  • Hot start programming – helps minimize fluctuation in water temps, during periods of frequent on/off operation.
  • Electronic controls – easy to adjust water temperature. The digital display shows temperature setting and maintenance codes.
  • Multi-unit capability – easily connect two or more units for high demand needs.
  • Digital remote control – can be set from 120º up to 140º maximum.
  • ENERGY STAR® – Meet and exceed ENERGY STAR® requirements with up to a .94 energy factor.

If you are still not sure if tankless is right for your needs, please read our previous blog post. “How to Choose a Water Heater” explains the differences among storage, tankless, heat pump, solar, and tankless coil & indirect water heaters. If your head is now spinning with “information overload,” we are here to help. We can be reached locally by calling 860-228-1036 or toll-free 800-229-8177. We also have an online Contact Us form for your added convenience.