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This document provides an in-depth analysis of DHP costs and non-energy benefits (NEBs), including an overview of findings from previous RTF discussions. It covers cost estimations, AC credits, and supplemental fuel benefits based on climate zones. Key calculations do not include maintenance costs or emissions impacts. The data is drawn from the NEEA DHP Program, highlighting median and average costs across various climate realities. Insights are aimed at achieving consensus on inputs for the UES workbook, facilitating well-informed decision-making.
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DHP Costs & NEBs Ecotope, Inc. August 20, 2013
Agenda Overview DHP Cost AC Credit Supplemental Fuel Benefit Summary Q&A
Overview • May RTF, presented DHP UES key issues • July RTF, presented SEEM calibration and preliminary savings estimates • August RTF, presenting cost/NEB analysis based on directives from May RTF • Quantify/monetize DHP cost, AC credit, supplemental fuel benefit • Do not quantify/monetize comfort or other takeback effects • Seeking general acceptance of cost/NEB inputs for UES workbook • September RTF, present UES workbook based on prior RTF feedback on calibration, savings inputs, and cost/NEB inputs
Cost/NEB Assumptions • Costs and NEBs are calculated by climate zone • Calculations do not include: • Operation & maintenance costs • Air pollution or emission impacts • Any change in supplemental fuel over measure life time
DHP Cost • Data source = NEEA DHP Program cost tracking (All_Approved_Install_Data-03_04_13.csv) • Cost average based on • “Total Cost,” minus tax • Weighted average of three climate zones • Total program dataset, n=18,091 • Screened in sequence: • Pre 3/31/12 sites, BPA changed reporting requirements (n=15,425) • Not multifamily (n=14,867) • 1 indoor head, 1 compressor (n=9,624) • >3/4t,<2t compressor capacity (n=9,055) • ≥$1,200, ≤$10,000 (n=9,046) • Total screened dataset, n=9,046
DHP Cost Distribution Median = $3,852 Mean = $3,874 Wtd mean = $3,859
AC Credit • AC equipment estimate = $447 • Source: Amazon, Target, Home Depot, Sears • Various capacities and makes, 10,000 up to 20,000 Btu/hr capacity (26 units) AC equipment credit by climate zone (credit for homes that do not already have AC): *Source: RBSA
Annual Supplemental Fuel Benefit Options Option 1: Benefit based on fuel cost = $0.082/kWh • Wood benefit = $0.068/kWh assuming $200/cord; 20 MMBtu/cord; 50% delivery efficiency • Propane benefit= $0.146/kWh assuming $2.84/gal (EIA); 92,000 Btu/gal; 72% delivery efficiency for high efficiency, freestanding stove or fireplace insert • Wood/propane ratio taken from RBSA, 17% of supplemental fuels is propane and 83% is wood (calcs. in table are weighted averages of both fuel types) Option 2: Based on retail kWh rate = $0.089/kWh • Avg. of WA, OR, & ID (April 2013) (http://www.eia.gov/electricity/monthly/epm_table_grapher.cfm?t=epmt_5_6_a)
Annual Supplemental Fuel Benefit Options, Cont. *HZ supplemental fuel saturations derived from RBSA **HZ supplemental fuel use derived from DHP billing analysis. Supplemental savings equals delta between total pre-space heat average with and with supplemental fuel.
Summary of Costs & NEBs Split capital cost by climate zone or use regional average? Use electricity cost equivalent to estimate supplemental heat benefit?
