Ground Source Heat Pump Upgrades

At a Glance

Status

deactivated

Fuel type

electric

Sector

residential

Applications

heating/cooling

Ground source heat pump systems use the relatively constant temperature of deep soil to transfer heat to and from a home. This measure covers new or existing site-built or manufactured homes in heating zones 2 and 3, GSHP system upgrade from Air Source Heat Pump or conversion from electric Forced Air Furnace (with or without Central AC), as well as an optional upgrade of Electric Water heater with Desuperheat pre-heating.

At the August 2021 meeting the RTF chose to deactivate this measure after determining that updating for reliability would not be a good use of RTF resources given the cost-effectiveness and uptake of the measure. Members acknowledged that the savings are not reliable, as the rely on a lot of RTF and analyst judgement, and agreed that the spare uptake and lack of cost-effectiveness warranted deactivation.

Workbook

Latest Version

Residential Ground Source Heat Pump v2.7

Residential Ground Source Heat Pump v2.7

An error in calculating the baseline ASHP energy consumption was corrector. This lowers the savings slightly for the ASHP-to-GSHP upgrade measure.

Date

Apr 16, 2020

Version number

2.7

Past Versions

version	date	document
2.6	Nov 16, 2016	Residential Ground Source Heat Pump v2.6 QC review complete.
2.5	Aug 30, 2016	ResGSHP_v2_5.xlsm Currently Undergoing QC.
2.4	Jun 23, 2016	ResGSHP_v2_4.xlsm Updated to new workbook format and 7th Power Plan assumptions.
2.3	Jan 04, 2016	ResGSHP_v2_3.xlsm Delivery verification checklist added
2.2	Nov 07, 2011	ResGSHP_v2_2.xlsm ProCost capital cost named range bug fixed.
2.1	Aug 09, 2011	ResGSHP_v2_1.xlsm Original savings workbook.

Decisions

Expand All Decisions

Latest decision

Decision details

Decided

August 31, 2021

Deactivate Measure

Decision Details

Deactivate the Ground Source Heat Pump Upgrades UES measure.

Decided

August 16, 2016

Approve Measure Update

Decision Details

Adopt the updated Residential Ground Source Heat Pump UES measure as shown and

Set sunset date to 5 years
Change category to small saver

Decided

November 10, 2015

Approve measure update

Decision Details

Adopt the delivery verification guidance as presented for the following measures:

Com Grocery – Display Case LEDs (Open Cases)
Com Grocery – Display Case Motion Sensors
Com Grocery – Floating Head Pressure Controls for Single Compressor Systems
Com Grocery – Strip Curtains
Com Grocery – Walk-in Evaporator Fan EC Motor Controllers
Com Grocery – Compressor Head Fan Motor Retrofit to EC Motor
Com Smart Plug Power Strips• Com Traffic Signals – LED Traffic Signals
Res Heating/Cooling – Electronic Thermostats
Res Heating/Cooling – Ground Source Heat Pump Upgrades
Res Lighting – High Performance T8 Lamps (4 foot and 8 foot).

Decided

October 15, 2013

Direction for further analysis

Decision Details

Use Option 3 in estimating the savings for residential heating system and weatherization measures, and that the RTF delegate a decision on the definition of the “full measure package” to a subcommittee.

Decided

October 04, 2011

Approve Measure Updates

Decision Details

The RTF approves the Ground Source Heat Pump (GSHP) specifications as proposed by the RTF Subcommittee with a sunset date of October 30, 2014.

A motion to develop open loop system specifications was rejected.

Decided

August 02, 2011

Approve measure update with direction for future analysis

Decision Details

The RTF approves the Ground Source Heat Pump (GSHP) UES Measure for heating zones 2 and 3 with the provision that RTF Staff edit the table to correct for increased electricity use for air conditioning when an electric forced air furnace without air conditioning is replaced with a GSHP and reduction in measure cost when an electric forced air furnace with air conditioning is replaced with a GSHP with a sunset date of August 30, 2016.The RTF app

The RTF will review open loop (pump and dump) and hydronic distribution cost and performance

Small/rural Checklist

Latest Version

August 2016 Residential GSHP Small/Rural Checklist v2.5

Date

Aug 30, 2016