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Home > Natural Resources > Water Strategies to Preserve Natural Resource Supplies and Quality

Tankless Water Heaters Save Energy and Water

Tankless water heaters have up to 50% on water bills and save both energy and water.

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Approximately 25% of the energy consumed by a household is from heating water. A gas-fired tankless water heater can be up to 4 times more energy efficient and save 25 to 50% on residential water bills. Hot water is a modern convenience that requires a significant amount of energy. There are easy changes that can incorporate into a home that reduces energy consumption and provide easier compliance with Title 24.

Tank water heaters store and heat water at all times, thus incurring higher operating costs, whereas tankless water heaters only heat water as needed. In addition, tank heaters have a limited supply of hot water and will run out of hot water while tankless heaters provide an unlimited supply of hot water.

Tankless water heaters can last 20 or more years, which is 2-3 times longer than a traditional tank heater.

California Energy Commission
How-to videos for consumers and professionals:


  • CHEERS: California Home Energy Efficiency Rating System CHEERS is a non-profit organization that performs accurate home energy efficiency assessments. Train, educate and certify energy raters. 800-4-cheers.

    Other cost savings and environmental savings come from:

    • Cool Roof Technology
    • Energy Efficient Windows
    • Housewrap
    • Heating Ventilation Air Conditioning
    • Insulations
    • Radiant Barriers
    • Structural Insulated Panels (SIPs)
    • Tankless Water Heaters
    • Ventilation and Indoor Air Quality

    Consumer Energy Center

    One California manufacturer of tankless water heaters is:

    Noritz America Corporation - Headquarters
    11160 Grace Avenue
    Fountain Valley, CA 92708
    TOLL FREE : (866) 766-7489
    Phone : (714) 433-2905
    Fax : (714) 241-1536

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