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About This Item


Full Description

Standard 146 provides methods of test testing for heating capacity and energy efficiency for rating pool heaters. The standard applies to forced-circulation heaters operated by gas, oil, and/or electricity, as well as hybrid heaters.

New in the 2020 edition:

- Reformatted the standard as a method of test.

- Expanded the scope to include heat-pump pool heaters that use earth, water, or brine as the heat source and hybrid pool heaters equipped with both a fossil-fueled burner and a heat pump.

- Revised the test method to address the products included by the expanded scope.

- Updated definitions and references.

- Modified the specification for use of the optional recirculating loop to make clear it applies only when required by the manufacturer.

- Added test methods to measure the standby and OFF-mode energy consumption.

- Deleted two obsolete informative appendices have been deleted and added a new Informative Appendix B describing test conditions used by the U.S. Department of Energy to rate pool heaters.


Document History

  1. ASHRAE 146-2020


    Standard 146-2020 -- Methods of Test for Rating Pool Heaters (ANSI Approved)

    • Most Recent
  2. ASHRAE 146-2011

    Standard 146-2011 -- Methods of Testing Pool Heaters (ANSI approved)

    • Historical Version
  3. ASHRAE 146-2006

    Standard 146-2006 -- Methods of Testing and Rating Pool Heaters (ANSI Approved)

    • Historical Version
  4. ASHRAE 146-1998

    Standard 146-1998 -- Method of Testing and Rating Pool Heaters (ANSI approved)

    • Historical Version