1. Northwest Power and Conservation Council Pre-Rinse Spray Valves RTF January 2007

2. Northwest Power and Conservation Council slide 2

3. Northwest Power and Conservation Council slide 3 Genesis Draft evaluation from California program evaluation finds much reduced savings Draft evaluation from California program evaluation finds much reduced savings Experience to date contains some surprises Experience to date contains some surprises EPAct 2005 set standards for spray heads EPAct 2005 set standards for spray heads –1.6 gpm for new heads beginning Jan 2006

4. Northwest Power and Conservation Council slide 4 Issues How do the CA (& other) findings impact RTF savings? How do the CA (& other) findings impact RTF savings? Are program changes, protocols or screening in order? Are program changes, protocols or screening in order? What PNW analysis & evaluation is needed? What PNW analysis & evaluation is needed? Who wants to help? Who wants to help?

5. Northwest Power and Conservation Council slide 5 Savings Estimates Council 5 th Plan Council 5 th Plan –3800 kWh per unit (head) Per Unit data from evaluations in AWWA study Per Unit data from evaluations in AWWA study –4400 kWh per unit in food service (n=36) –130 kWh per unit in groceries (n=7) Program level savings Program level savings –CUWWC Phase 2 (draft) per claimed head for mix of fuels & facilities & net of free-riders & removals: –51 kWh plus 28 therms plus 6400 gallons water

6. Northwest Power and Conservation Council slide 6 Savings Factors Pre- and post-install flow rates Pre- and post-install flow rates Delta T (mixed minus cold) Delta T (mixed minus cold) Hours of use pre- and post-install Hours of use pre- and post-install –Fewest data points on this with large uncertainty band Distribution of types of facilities Distribution of types of facilities Distribution of water heater types & efficiencies Distribution of water heater types & efficiencies Head retention & measure life Head retention & measure life Baseline penetration of low-flow heads Baseline penetration of low-flow heads Impact of EPAct 2005 standard for new heads Impact of EPAct 2005 standard for new heads

7. Northwest Power and Conservation Council slide 7 What We Know PNW programs at King County, PSE, & ETO PNW programs at King County, PSE, & ETO Avista is considering program & PECI considering as part of Energy Smart Grocer Avista is considering program & PECI considering as part of Energy Smart Grocer Recent study by SBW for American Water Works Recent study by SBW for American Water Works –Collects & synthesizes evaluation work to date in CA, PNW, Canada –Much good data on key factors that influence savings –Study is attached

8. Northwest Power and Conservation Council slide 8 Preliminary Thoughts Original savings estimate should be reviewed Original savings estimate should be reviewed –May be in the ball park for food service –But likely too high for groceries AWWA report has much useful data that could be employed to re-estimate savings AWWA report has much useful data that could be employed to re-estimate savings May need PNW measured data on hours of use pre- and post-installation May need PNW measured data on hours of use pre- and post-installation Get more PNW data on water temps Get more PNW data on water temps Find a contractor to do this with oversight of an RTF subcommittee Find a contractor to do this with oversight of an RTF subcommittee

9. Northwest Power and Conservation Council slide 9 Draft Recommendation Issue RFP Issue RFP –Review savings estimates in light of recent evaluation findings –Identify and conduct research needed to revise estimates –Develop program recommendations, savings protocols –RTF subcommittee to oversee

10. Northwest Power and Conservation Council slide 10 End