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Residential Hot Water Heaters Demand Response

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UES Measures Standard protocols list Demand Response Technologies Supporting Documents Propose a measure or standard protocol Proposed measures and status Whole Building Efforts

Subcommittees

Connected ThermostatsDemand ResponseDuct SealingGuidelinesHeat Pump Water HeatersImplementers GroupNatural GasNew HomesNon-Residential LightingOperationsRefrigerationResearch and EvaluationResidential HVACSmall and Rural UtilitiesWhole Building
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Demand Response Technology

  • Residential Hot Water Heaters Demand Response

Residential Hot Water Heaters Demand Response

At a Glance

Status 
active
Sector 
residential
Applications 
water heating

RTF analysts developed per unit technical potential estimates for demand response impacts in residential water heaters. Both electric resistance and heat pump water heaters were studied. The RTF approved the analysis methodology at the June 2019 meeting.

Demand response impacts from water heaters occur by reducing or eliminating the use of electricity for water heating during event hours. Theoretically, this can be accomplished using one or a combination of methodologies, including pre-heating water, adjusting set points, preventing the use of electric resistance heating elements in HPWHs, using mixing values, or interrupting power to all heating elements. Generally, electricity used for water heating is shifted to a different time of the day, but in some cases, aggregate energy usage may be reduced if a household uses water heated to a colder temperature during an event than otherwise would have been the case.

Workbook

Latest Version

Residential Water Heaters Demand Response Workbook v1.0

File Residential Water Heaters Demand Response Workbook v1.0
This workbook was approved at the June 2019 RTF meeting.
Date 
Jun 18, 2019
Version number 
1.0

Decisions

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Latest decision

Decision details

Decided 
June 18, 2019
RTF Meeting: June 18, 2019

Approve Demand Response Impact Estimate

Decision Details

Approve the recommended methodology for estimating maximum per unit potential of Residential Water Heaters as presented. 

  • The RTF recognized the additional factors will need to be considered to estimate achievable potential, which will be dependent on the DR product.
  • The RTF recommends that staff incorporate any relevant findings from the PNNL analysis into its material and update the RTF on notable findings.

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