Domestic Hot Water

Related Measures

• Enhanced Air-To-Water Heat Pumps (AWHPs)

  Measure Overview

  This proposal seeks to introduce mandatory and prescriptive requirements in Sections 120.5 and 110.2, and JA2 for AWHPs. This measure includes two proposals: Limit the concentration of propylene glycol in some situations,…

• Unitary HP/ER Hybrid Heaters

  Measure Overview

  This measure would add prescriptive requirements to Title 24 Part 6 to ensure that unitary Heat Pump / Electric Resistance (HP/ER) hybrid water heaters are specified and installed in a way that…

• Return-to-Primary Configuration

  Measure Overview

  This measure proposes to create a prescriptive pathway to require Return to Primary configuration for split Heat Pump Water Heater (HPWH) systems with recirculation in nonresidential buildings. This would include an alternative pathway for products on the Northwest Energy Efficiency Alliance (NEEA) Tier 3 qualified product list, including standardized configurations and…

• Circulator Pump Controls

  Measure Overview

  This measure would prescriptively require circulator pumps serving central service hot water systems in nonresidential buildings to have advanced pump controls. Applicable controls would include controls that are internal or external to the pump that reduce energy use at the pump and/or water heater. The…

• Nonresidential HPWH Ventilation Clean Up

  Measure Overview

  This measure would simplify the four compliance pathways in the 2025 code to make HPWH installation decision making simpler, as well as improving consumer-sized HPWH performance in nonresidential buildings.

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  This measure…