WAC 51-11C-40414:

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51-11C-40413 << 51-11C-40414 >> 51-11C-40415

PDFWAC 51-11C-40414

Section C404.14—Demand responsive water heating.

C404.14 Demand responsive water heating. Electric storage water heaters with rated water storage volume between 40 and 120 gallons and a nameplate input rating equal to or less than 12kW shall be provided with demand responsive controls that comply with ANSI/CTA-2045-B Level 2 or another equivalent approved demand responsive control.

EXCEPTIONS:	1. Water heaters that provide a hot water delivery temperature of 180°F (82°C) or greater.
	2. Water heaters that comply with Section IV, Part HLW or Section X of the ASME Boiler and Pressure Vessel Code.
	3. Water heaters that use three-phase electric power.
	4. Storage water heaters with demand responsive controls that comply with ANSI/CTA 2045-A or ANSI/CTA 2045-B Level 1, that are also capable of initiating water heating to meet the temperature setpoint in response to a demand response signal.

[Statutory Authority: RCW 19.27A.020, 19.27A.025, 19.27A.160 and chapters 19.27A and 19.27 RCW. WSR 22-14-091, 23-12-101, and 23-20-021, § 51-11C-40414, filed 7/1/22, 6/7/23, and 9/25/23, effective 3/15/24.]