Commercial Showerhead UES Measure Update Regional Technical Forum April 16, 2013

Commercial ShowerheadCommercial Showerhead Measure Overview Current Category: Small Saver Current Status: Under Review Current Sunset Date: May, 2013 Reason for Update/Review: Response to recommendation memo; and sunset date approachingrecommendation memo Baseline Type: Pre-Conditions

Summary of Updates Changes based on Recommendation Memo (all) – Clean workbook, in latest ProCost template – Updated average occupancy rates for hospitality and healthcare. Adjusted usage (minutes per year) accordingly. – Removed efficient case shower duration factor. Only anecdotal evidence of this effect. – Change source for the Recovery Efficiency of electric water heaters to the DOE Test Procedure Other Changes – Removed flow rate derating factor for 1.75 gpm and 1.5 gpm showerheads – current products are designed to provide rated flow rate across a wide range of pressures – Updated water costs. – Removed Mail-by-Request (Direct Mail) delivery mechanism. Not used in practice and significant uncertainty in installation rates and shipping/handling costs. – Updated electric DHW saturation rates building type specific values from CBECS (Pacific Region) and CBSA. Previously, residential value was used.

Remaining Issues for RTF Discussion 1.Removal of flow rate derating factor for 1.75 gpm and 1.5 gpm showerheads. Current products are designed to provide rated flow rate across a wide range of pressures. 2.Removal of Mail-by-Request (Direct Mail) delivery mechanism. Not used in practice and significant uncertainty in installation rates and shipping/handling costs. – Asked utilities if this delivery mechanism is used: Elizabeth Daykin – BPA has only used Direct Install for commercial showerheads Paul Sklar – ETO only does Direct Install for commercial showerheads Eric Brateng – PSE has not used Direct Mail for commercial showerheads David Thompson – Avista not done significant work with commercial showerheads No reply yet from Don Jones Jr. (PacifiCorp)

Summary of Changes kWh savings for 1.75 gpm reduce by 24% to 32%, primarily because of removal of flow rate derating factor. kWh savings for 1.5 gpm reduce by 5% to 16%, primarily because of removal of flow rate derating factor. kWh savings in “Any Fuel” cases further reduced (total reduction ~50%), primarily because of switch from residential to commercial electric DHW saturation values. Measure cost increased ~5% for retail, no change for direct install. All measures are still cost effective. Water savings alone makes these measures cost effective. Tables of changes to parameters, energy savings, gas savings, water savings, and TRC are presented in the “Presentation 1” and “Presentation 2” tabs in the Measure Workbook.

Staff Proposal Approve the updates to the commercial showerhead UES measure; Set the measure status to “Active”; and Change the sunset date to April, 2018.

Decision “I _______ move to approve the updates to the commercial showerhead UES measure; set the measure status to “Active”; and change the sunset date to April, 2018.” 7