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Thermostatic Shower Restriction Valve

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Work Products

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

Subcommittees

  • Agricultural Irrigation
  • Air Source Heat Pumps
  • Commercial HVAC
  • Compressed Air
  • Connected Thermostats
  • Demand Response
  • Ductless Heat Pumps
  • Duct Sealing
  • Guidelines
  • Heat Pump Water Heaters
  • Implementers Group
  • Market Analysis
  • Natural Gas Subcommittee
  • New Homes Standard Protocol
  • Non-Residential Lighting
  • Operations
  • Pump Systems
  • Research and Evaluation
  • Residential Behavior
  • Residential Lighting
  • RTF Policy Advisory Committee
  • Small and Rural Utilities
  • Statistical Methods
  • Whole Building Subcommittee
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UES Measure

  • Thermostatic Shower Restriction Valve

Thermostatic Shower Restriction Valve

At a Glance

Status 
active
Fuel type 
dual fuel
Sector 
commercial, residential
Applications 
DHW
Sunset date 
Jun 30, 2023

Shower events often begin with a period of time in which a plug of cold water in the hot water pipe is flushed out, after which the temperature of the shower water increases to a comfortable level.  Users may not begin showering until after this “structural waste” has been flushed out.  Users may take even longer to begin showering if they are occupied with other activities while the structural waste is being flushed out; this additional water use – after the structural waste but before the user begins showering – is called “behavioral waste”.

Thermostatic shower restriction valves (TSRV) save energy by minimizing shower flow from the time that the shower reaches showering temperature until the time that the user enters the shower. This measure has both residential and health care/assisted living applications.

Savings from TSRV are highly dependent on user behavior. Pre/post, metered research is necessary to understand usage and savings.  However, to date, this research has not been done.  This measure is therefore categorized as Planning because of significant uncertainties in the savings.  A Research Strategy is also provided, which describes the pre/post, end-use metered research necessary to develop a Proven measure.

Workbook

Latest Version

Thermostatic Shower Restriction Valve v5.0

File Thermostatic Shower Restriction Valve v5.0
Updated with 2021 Plan cost effectiveness methodology
Date 
Apr 18, 2022
Version number 
5.0

Past Versions

version date document
v 4.2
Sep 27, 2021
File Thermostatic Shower Restriction Valve v4.2
Reran through ProCost 3.1.05 to correct for minor error
4.1
Aug 07, 2020
File Thermostatic Shower Restriction Valve v4.1
QC complete.
4.0
Jun 23, 2020
File Thermostatic Shower Restriction Valve v4.0
Approved at the June 2020 RTF Meeting. Currently undergoing QC.
3.1
May 03, 2019
File Thermostatic Shower Restriction Valve v3.1
QA/QC review complete, changes made consistent with February 2019 RTF meeting.
3.0
Feb 27, 2019
File Thermostatic Shower Restriction Valve v3.0
Savings approved at February RTF Meeting. Awaiting QA/QC review
2.1
Sep 21, 2018
File Thermostatic Shower Restriction Valve v2.1
Post-QC version. Approved May 2018.
1.0
Jul 28, 2018
File Res_ThermostaticShowerRestrictionValve_v1_0.xlsm
Currently undergoing QC.
2.0
Jun 18, 2018
File ThermostaticShowerRestrictionValve_v2_0.xlsm
Pre-QC workbook. Approved May 2018.
1.3
Nov 29, 2016
File ThermostaticShowerRestrictionValve_v1_3.xlsm
QC complete. Measure updated to 7th Plan format and assumptions.
1.2
Jun 29, 2016
File ThermostaticShowerRestrictionValve_v1_2.XLSM
Updated to 7th Plan format and assumptions. Currently undergoing QC.
1.1
Oct 30, 2015
File ThermostaticShowerRestrictionValve_v1_1.XLSM
QC Review Complete. Residential and Commercial workbooks combined.
1.0
Jul 28, 2015
File Com_ThermostaticShowerRestrictionValve_v1_0.xlsm
Currently undergoing QC.
Supporting Documents
File RBSA2 For Water Measures
Aug 06, 2018
Water measure data from NEEA's RBSAII.
File Thermostatic Shower Restriction Valve Research Strategy v1.2
Aug 06, 2018
Adopted at the June 2020 RTF meeting.

Decisions

Expand All Decisions

Latest decision

Decision details

Decided 
June 23, 2020
RTF Meeting: June 23, 2020

Approved Measure Changes

Decision Details

Approve the updates to the Thermostatic Shower Restriction Valve UES measure as proposed and keep the Category at Planning, keep the Status at Active, and set the sunset date to June 30, 2023.

Decided 
February 19, 2020
RTF Meeting: February 19, 2020

Extend Sunset Date

Decision Details

Extend the sunset date for the following measures to June 30, 2020: 

  • Commercial and Residential Showerheads
  • Thermostatic Shower Restriction Valves
Decided 
February 20, 2019
RTF Meeting: February 20, 2019

Approve Measure Updates

Decision Details

Approve the updates as presented to the Thermostatic Shower Restrictor Valve measure:

  • Make changes consistent with residential low flow showerheads as approved
  • Add embedded water energy to TRC
  • Keep the category at Planning
  • Keep the status at Active
  • Set the sunset date to February 28, 2020
Decided 
May 22, 2018
RTF Meeting: May 22-23, 2018

Approve measure updates

Decision Details

Approve the updates to the Thermostatic Shower Restriction Value UES measure and Research strategy as proposed and

  • Keep the category as Planning
  • Keep the status as Active
  • Set the Sunset date to August 31, 2019
  • Add to the Research Strategy: presence of recirculation pump and length of run from recirculation loop to shower
Decided 
July 21, 2015
RTF Meeting: July 21, 2015

Approve measure update with direction for future analysis

Decision Details

Approve the Thermostatic Shower Restriction Valve UES measure and Research Strategy as presented: Set the category to ‘Planning’ Set the status to ‘Active’; Set the sunset date to July 31, 2018. Direct staff to update the parameter values in the Residential Showerhead UES measure to be consistent with the TSRV parameter values.

Decided 
February 19, 2014
RTF Meeting: February 19, 2014

Allocate resources to measure development

Decision Details

Allocate staff resources towards developing a Thermostatic Shower Restriction Valve Provisional UES measure

Decided 
January 22, 2014
RTF Meeting: January 22, 2014

Allocate resources to measure development

Decision Details

New Measure - Thermostatic Restriction Valve: Allocate staff resources to develop this measure and have staff come back in a few months and indicate what they are finding and if it’s still worthwhile to pursue.

Small/rural Checklist

Latest Version

February 2019 TSRV Small/Rural Utilities Checklist

File February 2019 TSRV Small/Rural Utilities Checklist
Date 
Feb 27, 2019

Past Versions

version date document
Aug 13, 2018
File August 2018 TSRV Small/Rural Utilities Checklist
Jul 28, 2015
File ThermostaticShowerRestrictionValve_SmallRuralUtilitiesUESDesignChecklist.xlsx

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