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Washington Energy Star and Built Green Homes Measure Update. New Measure Proposal August 12th , 2014. Measure Name: Energy Star Homes and WA Built Green Homes Measure Type: UES Measure Category: Proven Measure Sector: Residential Sunset Date: August, 2017

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Presentation Transcript
measure background

Measure Name: Energy Star Homes and WA Built Green Homes

Measure Type: UES

Measure Category: Proven

Measure Sector: Residential

Sunset Date: August, 2017

Reason for Update: Change in State Code and Energy Star Standard

Measure background
staff highlighted areas

Cost of infiltration reduction. Should these differ from infiltration reduction on existing homes?

    • Assumption $ 250 / 0.1 ACHn
Staff Highlighted Areas
specs development background

WA 2012 residential code allows a builder to choose one of many paths

    • RTF staff worked with WA department of Commerce, NW Energy Star and Ecotope Consulting to define typical code compliance paths
  • RTF Subcommittee formed to help draft Energy Star and Built Green home specs for WA
    • Built Green 3 or 4 star will use same specs as Energy Star
  • These specs provide a Reference Home that may be built to prescriptively or used as an energy use modeling target. Builders to use NW REMRate as a Energy Star compliance tool for RTF approved trade-offs.
Specs Development Background
energy savings calculations

Simulations conducted in SEEM 96

RTF approved new construction heating calibration applied

Staff proposed cooling calibration applied

Energy Savings Calculations
incremental cost

Incremental cost derived from the following sources:

    • Standard Information Workbook
    • 6th Power Plan Appendix
    • Existing RTF workbooks
    • Energy Trust Resource Assessment
  • Cost of infiltration reduction. Should these differ from infiltration reduction on existing homes?
    • Assumption $ 250 / 0.1 ACHn
Incremental Cost
estimated useful life

EUL of new construction measure is set at 45 years

  • Measures with EUL < 45 years have recurring cost at EUL
  • Source for EUL:
    • Existing measure workbooks
    • DEER
    • EUL consistent with new construction measures in other states
Estimated Useful Life
energy savings comparison
Energy Savings Comparison

Note: Existing kWh are an average of all Existing Energy Star New Construction measures. There were three different paths to Energy Star: Envelope, Equipment and Ducts Inside path.

incremental cost comparison
Incremental Cost Comparison

Note: Existing Cost are an average of all Existing Energy Star New Construction measures. There were three different paths to Energy Star: Envelope, Equipment and Ducts Inside path.

cost effectiveness comparison
Cost Effectiveness Comparison

Note: Existing TRC are an average of all Existing Energy Star New Construction measures. There were three different paths to Energy Star: Envelope, Equipment and Ducts Inside path.

rtf proposed motion

“I _________ move that the RTF:

Adopt the WA Energy Star and Built Green measures and set the sunset date to August 2017

RTF Proposed Motion: