Heat Pump Water Heater

Request for Feedback on a proposal to add UES measures with a “Retail – any

installation location” delivery mechanism

Regional Technical ForumOctober 24, 2012

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Proposal Overview

Proposal: Add the following 3 measures

Delivery Mechanism: Retail sale of unspecified installation location and house space heat type. Manufacturer, Dealer, or Consumer Rebate.

Tier 1 Tier 1 Tier 2HPWH Location Space Heat Type Small Tank Large Tank Any SizeUnheated Buffer Location Any Heat Type 881 1,811 1,786 Interior Location Gas Heated Home 1,547 2,169 1,726 Interior Location Zonal Electric Heated Home 648 957 994 Interior Location Electric Furnace Heated Home 556 833 884 Interior Location Heat Pump Heated Home 1,189 1,686 1,267

Annual Energy Saving (kWh/yr)

Existing 15 Measures:

Delivery Mechanism: Manufacturer, Dealer or Consumer Rebate and Direct Installations.

Tier 1 Tier 1 Tier 2HPWH Location Space Heat Type Small Tank Large Tank Any SizeAny Installation Location Any Heat Type # # #

Annual Energy Saving (kWh/yr)

Apply a Weighted Average

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Why?

• A “retail” measure would allow the region to capture savings from units purchased outside of utility rebate programs– Some sales will be tracked by utilities in their

programs. • These will have known installation locations, so they will

use the existing measures.

– Others will occur without utility incentive, so won’t be tracked.

• Installation location will be unknown, so these will use the proposed “retail” measures.

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How?• Use RBSA data to determine the weighted averages

– Table 103: Distribution of Electric Water Heater Location by Primary Space Heating Fuel Type

– Table 48: Distribution of Primary Heating Systems• Table 52: Distribution of Fuel Choice, Forced Air Furnaces• Table 53: Distribution of Fuel Choice, Boilers• Table 54: Distribution of Fuel Choice, Combustion Heating Stoves

• Result (weighted average used in next slide):

• Note: This weighting method assumes the HPWH replaced an electric water heater. Should we also assume some percentage of HPWH’s will replace gas water heaters? If so, what data to use?

Water Heater Location

Space Heat Type

Mix

Unheated Any 25%

Inside Gas (&other) 49%Inside Zonal 11%

Inside eFAF 4%Inside HP 10%

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Tier 1 Tier 1 Tier 2

HPWH Location Space Heat Type Small Tank Large Tank Any SizeAny Installation Location Any Heat Type 1,202 1,837 1,574

Annual Energy Saving (kWh/yr)

Preliminary Results

Proposal: Add the following 3 measures

Delivery Mechanism: Retail sale of unspecified installation location and house space heat type. Manufacturer, Dealer, or Consumer Rebate.

Tier 1 Tier 1 Tier 2HPWH Location Space Heat Type Small Tank Large Tank Any SizeUnheated Buffer Location Any Heat Type 881 1,811 1,786 Interior Location Gas Heated Home 1,547 2,169 1,726 Interior Location Zonal Electric Heated Home 648 957 994 Interior Location Electric Furnace Heated Home 556 833 884 Interior Location Heat Pump Heated Home 1,189 1,686 1,267

Annual Energy Saving (kWh/yr) Tier 1 Tier 1 Tier 2HPWH Location Space Heat Type Small Tank Large Tank Any SizeUnheated Buffer Location Any Heat Type 881 1,811 1,786 Interior Location Gas Heated Home 1,547 2,169 1,726 Interior Location Zonal Electric Heated Home 648 957 994 Interior Location Electric Furnace Heated Home 556 833 884 Interior Location Heat Pump Heated Home 1,189 1,686 1,267

Annual Energy Saving (kWh/yr)

Existing 15 Measures:

Delivery Mechanism: Manufacturer, Dealer or Consumer Rebate and Direct Installations.

Apply the Weighted Averages from the previous slide

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Is an additional Research Plan required for this provisional UES measure?

• Data Source may not match Measure– The RBSA data represent average characteristics of houses in the

Region. – For this measure, we need average characteristics of the houses

where a HPWH is purchased at retail (and not in a utility program).• Require data collection on ultimate location of the “retail”

HPWH’s?– What method of data collection?

• Survey of participants? Sample size?• Data collection at point of sale for each unit?

– How long to collect data?– For how long would the data be good for use in a “proven”

measure analysis?

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Decision

• Not looking for a decision today.

• Requesting RTF feedback on appropriate UES estimation method, data sources, and provisional requirements (if any).