Tankless Water Heaters Vs. Tank Water Heaters


The decision whether to use a tank or a tankless water heater depends on individual usage, location, energy source and climate. (See Reference 1)


  • The tank and tankless water heaters have the same function: provide the homeowner with sufficient hot water for cooking, cleaning and bathing.


  • Tank water heaters are available in three fuel types: electric, natural gas and liquid propane.

    Tankless water heaters are available in electric and natural gas. (See Reference 3)


  • Tank water heaters are becoming more efficient with newer technology. They are less expensive to install and require less maintenance. (See Reference 1) When the tank is correctly sized, there is plenty of hot water when needed.

    Tankless water heaters are smaller in size, can be installed by one person and can be mounted closer to the point of use for faster hot-water delivery. (See Reference 2)


  • When converting from a tank water heater to a tankless water heater, the entire venting system will need to be replaced. (See Reference 1)


  • Ninety percent of failures for a tank water heater result from the tank rotting and leaking. This can be prevented with proper maintenance of the diode rod. (See Reference 1)

    Tankless water heaters located in cold climates where power failures are an issue are subject to cracking heat exchangers especially for short vent installations. (See Reference 1)

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