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Standard Information Workbook Update. Regional Technical Forum June 18, 2013. What is the Standard Information Workbook (SIW)?.
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Standard Information WorkbookUpdate Regional Technical Forum June 18, 2013
What is the Standard Information Workbook (SIW)? • A centralized data resource containing regionally representative costs, non-energy benefit data, and other measure-related data that are common across multiple measures • Data are recorded and documented in the SIW (an Excel Workbook), which will be available on the RTF website • Provides automatic conversion from data-year dollars to base-year (2006) dollars using Council’s GDP deflator • Provides a consistent platform for cost data and analysis
History of SIW Development • Contract awarded in August, 2012 to EES (Kevin Smit) • EES gathered data from a number of NW organizations to populate the SIW • Contributors included ETO, Fluid, PNNL, Avista, NEEA, and WSU • EES presented draft SIW to the RTF during the January 2013 meeting • RTF suggested a few minor changes and issues to review before adopting the SIW
Suggested Updates from Last SIW Presentation (1/23/2013 RTF Meeting) • CFL Costs • Check to see if sales tax is included in NEEA CFL cost study; if so, remove • Labor Costs • Include regional labor costs if possible (previously at state level) • PTCS Duct Sealing Cost (SF/MF) • Filter out projects which do not meet the PTCS specification • Window and Insulation Costs (SF/MF) • Check current estimates against other data sources (Tacoma provided program data) • Sales Tax Rates • Correct sales tax rates for WA and ID • Level of Uncertainty – All measures • Indicate confidence interval (where possible) or degree of uncertainty for SIW values
Summary of Updates • Changes to SIW Based on RTF Comments/Meeting Minutes • CFL Costs • Contacted KEMA (author of NEEA CFL study) about CFL sales tax inclusion • CFL costs in study do not include sales tax, therefore do not need to be adjusted • Labor Costs: Updated state-level labor costs and added city/regional labor costs where available1 • PTCS Duct Sealing Cost (SF/MF): Costs now based only on projects meeting the PTCS specifications. • Sales Tax Rates: Corrected WA and ID tax rates • Level of Uncertainty – All measures: Added appropriate indicator of uncertainty for point estimates in SIW using same procedure used in measure workbooks • Window and Insulation Costs (SF/MF): Integrated additional data provided by Tacoma Power; updated costs and analysis (see next slides for details) 1 U.S. Bureau of Labor Statistics, Occupational Employment Statistics. http://www.bls.gov/home.htm
Insulation and Window Cost Updates • RTF staff included additional data provided by Tacoma Power, including installation costs for insulation (attic, floor, wall) and windows. • RTF Discussion Point: RTF staff modeled insulation costs in a few different ways, each with their own pros and cons • Bin method • Pro(s) – most representative of observed costs where N is large (e.g. 1,000) • Con(s) – costs noisy where N is small (e.g. 1) • Slope method • Pro(s) – simplest of the methods (1 variable), takes advantage of all data points (i.e., N is large) • Con(s) – method purely driven by incremental R value, does not model fixed costs • Slope + intercept method • Pro(s) – fairly simple model (2 variables); models fixed and variable costs • Con(s) – does not capture non-linearity of costs which the bin method can capture
Insulation and Window Cost Updates (Contd.) N = 1 N = 11 N = 4
Insulation and Window Cost Updates (Contd.) N = 1 N = 11 98% N = 4
Insulation and Window Cost Updates (Contd.) N = 2,763 N = 893
Insulation and Window Cost Updates (Contd.) N = 28 N = 48 N = 5 Fewer data points makes the story more complicated for Multi-Family…
Insulation and Window Cost Updates (Contd.) Avg. = 67%
Insulation and Window Cost Updates (Contd.) • Additional data provided by Tacoma Power for window installations was appended to existing ETO dataset. The method of analysis was unchanged. • RTF Discussion Point: RTF Staff proposes slope + intercept method for insulation. Agree? • RTF Discussion Point: Single family window upgrades are more expensive than multifamily upgrades. • Upgrade to Class 30 costs $15.94/sf for multifamily installations and $20.70/sf for single family installations. • This difference could be due to: economies of scale in multifamily applications, aesthetic adders in single family installations • Should multifamily costs be used for single family?
Summary of Updates (continued) • Other Additions to SIW • Lighting HVAC interaction factors (by building type, 6th plan) • Heating and Cooling Degree Days for prototype cities (TMY3) • NW-specific rental costs for metering equipment (gathered by Mark Kendall in Nov. 2012) • Water/wastewater costs, with and without embedded energy (same costs already used in the Commercial Clothes Washer and Showerhead measures passed by the RTF in April)
Summary of Updates (continued) • Updated measure lifetime table with the measures passed in April • Plan going forward is to continually update SIW Lifetime Reference Table as UES measures are approved • Copied the cost section of the measure summary into each tab to align with measure workbooks
Future Additions to the SIW • Similar to the guidelines, the SIW is a living document that will be updated periodically. • Some future additions to the SIW have already been proposed: • DHP costs • Electric and gas DHW efficiencies • EER values for commercial refrigeration equipment • Water mains temperatures by region (as well as ∆T’s for appliances if possible) • Others?
Staff Proposal • To adopt the default values currently proposed in the Standard information Workbook for use in completing measure assessments.
Decision “I _______ move to adopt the default values currently proposed in the Standard information Workbook for use in completing measure assessments.”
