1 analysis of two-tiered deemed savings values for energy star clothes washers february 10, 2004

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Analysis of Two-Tiered Deemed Savings Values for Energy Star

Clothes Washers

February 10, 2004

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Issue Summary

• Northwest Energy Efficiency Alliance is deploying an Energy Star marketing program that provides “two-tiered” incentives– MEF < 1.6– MEF =>1.6

• Existing Deemed Savings Analysis provides “single tier”

• Existing deemed savings calculator provides model specific savings

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Alliance Request RTF Consider Establishing “Two Tiered” Deemed Values

• Available Data– Market sales data (brand & model) from last years

“Double Your Savings” campaign– Energy Star data on MEF and Water Factors

• Approach– Estimate “sales weighted” MEF and Water Factors

for each tier– Use each tier’s values as basis for savings (water and

electric)

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Distribution of MEF from “Double Your Savings” Rebate Reports

0%

2%

4%

6%

8%

10%

Shar

e of

Sal

es

1.3 1.4 1.5 1.6 1.7 1.9

MEF

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Distribution of WF from “Double Your Savings” Rebate Reports

0%

2%

4%

6%

8%

10%

Shar

e of

Sal

es

4 4 6 7 8 8 9 9 11

Water Factor (gals/cycle)

Summary Statistics on MEF

Statistic ALL MEF 1.26 - 1.59 MEF => 1.60

Number of Washers

12,978 5,442 7,536

Simple Average

1.61 1.40 1.79

Median

1.61 1.44 1.73

Mode

1.29 1.29 1.68

Weighted Mean

1.65 1.48 1.77

Summary Statistics on WF

Statistic ALL MEF 1.26 – 1.59 MEF => 1.60

Number of Washers 12,894 5,366 7,528

Mean 7.63 9.14 6.43

Median 8.03 9.14 5.93

Mode 9.44 9.44 4.36

Weighted Average 7.21 8.86 6.03

Proposed Deemed Savings by MEF/WF Tier

MeasureEnergy Star MEF kWh/Savings Credit

Existing Deemed Value 1.61 310

$155 FY04

$102 FY05

Tier 1 1.48 251

$134 FY04

$81 FY05

Tier 2 1.77 368

$173 FY04

$120 FY05