Residential Heat Pump Water Heaters

At a Glance

Workbook

Latest Version

Residential Heat Pump Water Heater v6.3

Residential Heat Pump Water Heater v6.3

Updated cost effectiveness using procost version 5.08

Date

Jul 14, 2023

Version number

6.3

Past Versions

version	date	document
6.2	Jun 13, 2022	Residential Heat Pump Water Heater v6.2 Approved at the April 2022 RTF meeting. QC complete.
6.1	Apr 27, 2022	Residential Heat Pump Water Heater v6.1 Approved at the April 2022 RTF meeting. Currently undergoing QC.
6.0	Apr 18, 2022	Residential Heat Pump Water Heater v6.0 Updated with 2021 Plan cost effectiveness methodology
5.3	Sep 27, 2021	Residential Heat Pump Water Heater v5.3 Reran through ProCost 3.1.05 to correct for minor error
5.2	Apr 30, 2021	Residential Heat Pump Water Heaters v5.2 QC review complete.
5.1	Feb 26, 2021	Residential HPWH UES v5.1 Workbook for measure as approved at the January and February 2021 RTF meetings. Undergoing QA/QC review.
5.0	Jan 20, 2021	Residential Heat Pump Water Heaters v5.0 Pending QA/QC review until RTF decision on full measure.
4.2	Jun 26, 2019	Residential Heat Pump Water Heater v4.2 Measure as approved at the January 2018 RTF Meeting. Minor error corrected on the Measure Table. Only impacted measure name reference and did not have any impact on savings, costs, or lifetimes.
4.1	Apr 19, 2018	Residential Heat Pump Water Heater v4.1 QC review complete.
4.0	Feb 09, 2018	ResHPWH_v4_0.xlsm Workbook version approved at the January 2018 RTF Meeting. Undergoing QC.
3.4	Apr 05, 2017	ResHPWH_v3_4.xlsm QC review complete.
3.3	Nov 17, 2016	ResHPWH_v3_3.xlsm Updated with changes adopted at the November 2016 RTF Meeting. Currently undergoing QC.
3.2	Jun 29, 2016	ResHPWH_v3_2.xlsm Updated to 7th Plan assumptions and format. Currently undergoing QC.
3.1	Sep 11, 2015	Res_HPWH_v3_1.xlsm QC Review Complete
3.0	Jul 28, 2015	Res_HPWH_v3_0.xlsm Currently undergoing QC
2.2	Mar 19, 2015	Res_HPWH_v2_2.xlsm Original savings workbook. QC review complete
2.0	Nov 21, 2014	Res_HPWH_v2_0.xlsm Original savings workbook. Currently undergoing QC
1.3	Jan 13, 2014	Res_HPWH_v1_3.xlsm Fixed small error in lookup table.
1.2	Mar 13, 2012	Res_HPWH_v1_2.xlsm Added tier 2 units for ducted interior installations.
1.0	Oct 21, 2011	Res_HPWH_v1_0.xlsm Original savings workbook.

Decisions

Expand All Decisions

Latest decision

Decision details

Decided

May 22, 2025

Extend Sunset Date

Decision Details

Extend the sunset date for the Residential Heat Pump Water Heaters UES to July 31, 2025.

Decided

December 17, 2024

Approve Updates to Measure Sunset Dates

Decision Details

Approve the sunset date extensions as follows:
MH Duct Sealing UES to June 30, 2025
Door Sweeps UES to September 30, 2025
Residential Heat Pump Water Heaters UES to May 31, 2025
Consumer HPWHs in Commercial Applications UES to May 31, 2025

Decided

April 19, 2022

Approve Measure Updates

Decision Details

Update the Residential HPWH UES measure as proposed:

Keep the Measure Category at:
- Planning for split system applications
- Proven for all other applications
Keep the Measure Status at Active, and
Set the Sunset Date to December 31, 2024

Notes on changes:

Minor decrease in savings for most exhaust ducted HPWH applications
7 tier 3 applications became not cost effective 6 tier 4 applications became cost effective

Decided

February 17, 2021

Approved Measure Updates

Decision Details

Adopt the updates as proposed for “Path 1”, specifically:

Add measure applications for HPWH installations in new construction where HPWH is incremental to building code and not claimed in any other efficiency program;
Remove measure applications for the current “Any Vintage/Any Install Location” measure applications and retire the related Research Strategy
Set the Measure Category to Proven and Status to Active for all new, incremental-to-code new construction UESs

Decided

January 20, 2021

Approved Measure Updates

Decision Details

Adopt the updates as presented to the existing home residential HPWH UES measure applications;

Keep the Category Proven for all non-split system applications and Planning for all split-system applications;
Keep the Status at Active
Change the Sunset Date to December 31, 2024

Decided

January 30, 2018

Approve Measure Updates

Decision Details

Adopt the updates as proposed for the existing residential Heat Pump Water Heater measure applications:

Change the Category to Proven
Keep the Status at Active
Change the Sunset Date to January 31, 2021

Decided

January 30, 2018

Adopt New Measure Applications

Decision Details

Adopt the new Residential Heat Pump Water Heater UES measure applications as proposed for "Any Vintage/Any Install Location":

Update the Research Strategy to reflect
- higher estimated cost bin
- making the permit review an alternate candidate approach
- have market data collection to include sectors outside of single family homes
Update HVAC weight distribution for new construction branch to reflect only homes with electric water heating
Set the Category to Planning
Set the Status at Active
Set the Sunset Date to January 31, 2021

Decided

November 09, 2016

Approve new measure application

Decision Details

Adopt the Tier 4, No Resistance, Split-System Heat Pump Water Heaters for Single Family and Manufactured Homes UES measure specification, savings, cost, life, and Research Strategy as proposed (assume any size tank for hot water use),

Individual Application Category: Planning
Individual Application Status: Active
Individual Application Sunset Date: November 30, 2019

Note: This measure application was adopted with a category and sunset date that differ from other measure applications included in this measure workbook.

Decided

November 09, 2016

Approve measure updates

Decision Details

Update the retrofit measure to reflect the latest market mix;
Set the sunset date for the HPWH UES measures to January 31, 2018;
Add to the measure specification for all current HPWH UES measures that the pre-existing water heater type must be electric;
Adopt the HPWH UES measures with the identifier "any installation location" as proposed, with the same category (Planning), status (Active), and sunset date (January 31, 2018) as the existing HPWH measures;
Accept the Research Plan for HPWH UES measures and change the category of the measure from Planning to Provisional
Direct staff to work with the PAC on the fuel switching question;
Direct staff to work with a subcommittee on developing an upstream planning measure and related research strategy

Decided

July 19, 2016

Sunset date extension

Decision Details

Extend the sunset date of the Residential Single Family and Manufactured Home HPWH UES measure to December 31, 2016.

Decided

July 21, 2015

Approve measure update

Decision Details

For the Residential Single Family and Manufactured Home HPWH UES measure:Approve the measure updates as presented, with small/large tank baseline, combined any tank baseline, updated costs and savings, and a new Tier 3 measure; Adopt the revised research strategy; Keep the Category at Planning; Change the Status to Active; Set the sunset date to 7/31/2016.

Decided

April 14, 2015

Change measure status to under review

Decision Details

For the Residential Single Family and Manufactured Home HPWH measure, accept the research strategy for the HVAC interaction parameter; change the Category to 'Planning'; change the Status to 'Under Review'; Set the sunset date to 12/31/2015.

Research Strategy for HVAC interaction is needed

Decided

November 18, 2014

Approve measure update with direction for future analysis

Decision Details

Update the savings, cost, and life for the HPWH UES measures as proposed and set the measure to Provisional category and Under Review status. Direct staff to develop research plan focused on:

HVAC interaction factor, using a combination of a PNNL lab homes study and an engineering study, as proposed;
and Determining baseline using data on existing tank size, sales data, and possibly survey data.

Set the sunset date to 4/2015, at which time the RTF will review the research plan.

Decided

February 14, 2012

Approve measure update with direction for future analysis

Decision Details

The RTF approved the addition of Tier 2, Ducted Interior Installations to the Heat Pump Water Heaters UES Measure under provisional status with a sunset date of December 31st, 2014.

RTF subcommittee will assist with the development of the HPWH savings research. NEEA will be developing an installation specification to achieve 200 CFM exhaust airflow.

Decided

October 04, 2011

Approve Measure Update with Direction for Subcommittee

Decision Details

Approved the Heat Pump Water Heater UES Measure, as revised during the meeting, under provisional status to include Tier I systems in all applications and Tier II In buffered unconditioned spaces (interior applications expected at a later date), with the assumed cost of the GE Unit set at $1,200 and overall measure cost adjusted accordingly, and with the study design directed by an RTF sub-committee, and a sunset date of December 31, 2014

Small/rural Checklist

Latest Version

February 2015 HPWHs Small/Rural Checklist

Date

Feb 18, 2015

Past Versions

version	date	document
	Jan 30, 2015	HPWHs_SmallRuralUtilitiesUESDesignChecklist 1.29.15 v1.xlsx