Pre-Rinse Spray Valve Small Saver UES Measures

1. Pre-Rinse Spray Valve Small Saver UES Measures Regional Technical Forum September 17, 2013

2. Measure Overview • Current Category: Small Saver • Current Status: Under Review • Current Sunset Date: December, 2013 • Reason for Update/Review: Follow-up to recommendation memo • Subcommittee Review: No

3. Measure history • Measure approved by RTF in April, 2009. • RTF opted for a single measure suitable to all facility types and all utility territories. • UES Review December, 2012: measure moved to “Under Review” • Update baseline and efficient case flow rates • Include water heating efficiency • Use RTF standardized water costs and embedded energy

4. Recent Developments • U.S. EPA WaterSense • Developing specifications for a WaterSense label • 1.28 gpm (20% less than federal standard) • Additional performance criteria to be determined • Proposed spray force (~5.0 ounces force) and life cycle (500K or 150K) • Field study findings • “Cleanability” metric was not a good indicator of use time or user satisfaction. • “Force” was better correlated to user satisfaction, but still not a clear indicator • User satisfaction was significantly lower for PRSVs with flow rate lower than 1.00 than for higher flow units • Highly dependent on specific product, though. • Public comment • PRSV under 0.80 gpm belong in their own category, typically lower force than units greater than 0.80 gpm

5. Recommendation Memo [slide 1] 1) Workbook needs to be updated to use latest ProCost template which includes Measure Cost and EUL summary worksheets - DONE 2) Incorporate an electric water heating efficiency parameter into the kWh per Year (water heating) equation - DONE 3) Update the baseline Flow Rate parameter by adding the four additional FSTC tested spray valves into the baseline flow rate data set– DONE, but Baseline definition changed • FSTC had tested 10 additional spray valves (as of July, 2013) since version 1_1 of this analysis. All 10 were included. • However, proposed baseline is the measured flow rate of existing 1.6 gpm nominal valves in the PSE program. 4) Include the current efficient case spray valve, the Bicor model B064 PRV, into the baseline flow rate data set– DONE, but Baseline definition changed • Proposed baseline is the measured flow rate of existing 1.6 gpm nominal valves in the PSE program.

6. Recommendation Memo [slide 2] 5) Consider the T&S EB-0107-C valve with a Flow Rate of 0.64 GPM as the new efficient case – NOT DONE • Instead, redefined efficient case to two tiers. • WaterSensestudy found that user satisfaction with <1.0 gpm products was low, but product dependent. Categories allow programs to select products that their customers are satisfied with. 6) Use a Days of Operation per Year value consistent with other RTF commercial kitchen measures. – NOT DONE • Usage is based on metered studies that included days of zero usage. • Hours of operation are now based only on data sets where this is clear. 7) Combine the Supply Water Energy Savings and Waste Water Energy Savings parameters into a single Water Energy Intensity parameter and set to the 6th plan value of 5.3 kWh/1000 gallons. - DONE

7. Additional Modifications • Baseline flow rate – now using measured flow rate of existing 1.6 gpm valves in the PSE program(1.33 gpm) • RTF Staff considered other definitions • Average of all valves replaced by PSE in 2013 (1.75 gpm) • Excepted average of all valves in 2013, based on linear trend from 2008 to 2013 (1.64 gpm) • Average of valves from new participants only in 2013 (1.98 gpm) • While the program also replaces higher gpm valves, RTF staff expect the baseline equipment to converge on 1.6 gpm valves over the lifetime of the measure because the 1.6 gpm federal standard went into effect in 2006.

8. Additional Modifications • Usage (hours/day) – using average instead of median. Excluding CA data because of ambiguity in definition of values. • Weighting of facility types – using average of PSE and SCL program participation. Current measure uses only PSE. • Cost estimate – • using 2004-05 CA program costs. • Separate measures for installations requiring a licensed plumber and installations not requiring a licensed plumber. • Fuel type - Added gas

9. Workbook • [review workbook]

10. Decision • “I _______ move to approve the updates to the Pre-Rinse Spray Valve small saver UES measure; set the measure status to “Active”; and change the sunset date to September 2016.”