AHRI 1430: Demand Flexible Electric Storage Water Heaters

Standard Scope

This standard applies to communication, infrastructure, and system functionality as these relate to the implementation of energy management strategies for demand flexible water heaters (DFWH), with a nominal storage capacity greater than or equal to forty gallons and less than or equal to 120 gallons, installed in residential and small commercial applications as defined in Section 3.


  • Standardized communication required to enable participation in load management programs of electric utilities and consumer authorized third parties.

  • Infrastructure including the physical layer, to enable direct communication between DFWHs and electric utilities and consumer authorized third parties.

  • DFWH functionality including the control modes and how the system responds to signals to adjust operation.

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