Prepared For: Prepared By: 100 Montgomery Street, Suite 600 San Francisco, CA Market Street San Francisco, CA The Benefits of Retrocommissioning for Energy Efficiency CPAU Facilities Managers Meeting October 26 th, Hamilton Avenue Palo Alto, CA 94301

© 2011 AGENDA Introduction – About Enovity Retrocommissioning (RCx) Defined Savings and Payback LEED Buildings – Good Candidates? RCx Opportunity Indicators RCx Measures incentivized through CIEEP CIEEP Case Study – RCx & Retrofit Measures at work CPAU Commercial and Industrial Energy Efficiency Program (CIEEP) Question & Answer Discussion

© 2011 Enovity: Is an energy engineering and sustainability consulting firm Offers an array of services: –Utility Programs –Energy Services –Building Commissioning –Building Automation –Advanced Operations and Maintenance –Sustainability Services Has a team of 125+ mechanical and controls engineers, project managers, O&M, and admin staff Operates offices in San Francisco, Sacramento, Irvine, San Diego, and Phoenix ABOUT ENOVITY

© 2011 RETROCOMMISSIONING (RCX) ret·ro·com·mis·sion·ing 1 A systematic method for investigating how and why an existing building’s systems are operated and maintained, and identifying ways to improve overall building performance 1 Haasl, T Heinemeier, K 2006, “California Commissioning Guide: Existing Buildings” Prepared by Portland Energy Conservation, Inc. for California Commissioning Collaborative

© 2011 RETROCOMMISSIONING OUTCOMES: SAVINGS RANGES AND PAYBACK Mills, E, 2009, “Building Commissioning A Golden Opportunity for Reducing Energy Costs and Greenhouse Gas Emissions" Prepared by Lawrence Berkeley National Laboratory for California Energy Commission Public Interest Energy Research (PIER) 59pp (Figure s 10 & 11)

© 2011 RETROCOMMISSIONING FOR ENERGY EFFICIENCY: TYPICAL RESULTS BY BUILDING TYPE Results by Building Type (Existing) Mills, E, 2009, “Building Commissioning A Golden Opportunity for Reducing Energy Costs and Greenhouse Gas Emissions" Prepared by Lawrence Berkeley National Laboratory for California Energy Commission Public Interest Energy Research (PIER) 59pp (Table 5)

© 2011 MEASURED VS. PROPOSED SAVINGS FOR LEED ® BUILDINGS Why? Overly optimistic energy models Changes in building use (longer hours of operation, increased occupant density, etc.) Unresolved deficiencies from construction Inadequate Cx Operator overrides and inadequate training & resources Measured vs Proposed Savings Turner, C. Frankel, M., 2008, "Energy Performance of LEED® for New Construction Buildings." Prepared by New Buildings Institute for the U.S. Green Building Council 42pp (Figure 20) Predicted and Measured Energy Use may not correlate!

© 2011 RCX OPPORTUNITY INDICATORS Retrocommissioning Opportunity Indicators 1 Presence of systems that simultaneously heat and cool, such as constant and variable air volume reheat Presence of economizers Pumps with throttled discharge valves Equipment or lighting that is on when the space is unoccupied Improper building pressurization (either negative or positive); i.e., doors that won’t close or are difficult to open Equipment or piping that is hot or cold when it shouldn’t be; unusual flow noises at valves or mechanical noises Short cycling of equipment Variable frequency drives appear to be operating at or close to 100% most of the time High Energy Costs ! 1 Haasl, T Heinemeier, K 2006, “California Commissioning Guide: Existing Buildings” Prepared by Portland Energy Conservation, Inc. for California Commissioning Collaborative

© 2011 HVAC Airside Reduce supply fan operating schedule Adjust airside economizers Adjust zone temperature dead-band Add supply air temperature setpoint reset strategy Reduce supply duct static pressure setpoint Add supply duct static pressure setpoint reset strategy Add / restore fan VFD HVAC Waterside Add / optimize boiler lockout Add chilled water supply temperature setpoint reset strategy Add condenser water supply temperature setpoint reset strategy Add / restore pump VFD Lighting Reduce lighting operating schedule Install lighting occupancy sensors TYPICAL RCX MEASURES INCENTIVIZED THROUGH CIEEP

© 2011 CASE STUDY: CIEEP PARTICIPANT PRE V POST DEMAND COMPARISON

© 2011 CASE STUDY: CIEEP PARTICIPANT RESULTS EEM1 includes CW Reset EEM3 includes opening balancing valve Project Details: Implemented Spring MWh/yr Verified Savings 500 MWh/yr Metered Savings $40k/yr Electric Cost Savings $42k CIEEP Incentive 3.1 yr Project Payback

© 2011 CIEEP OVERVIEW The Commercial & Industrial Energy Efficiency Program (CIEEP): Is a CPAU Third Party Program Offers incentives and no-cost technical services to commercial and industrial customers Investigates opportunities for energy efficiency (including RCx) Achieves installed and verified energy savings

© 2011 Consultation with customer to understand general facility characteristics and financial criteria for implementing energy projects Detailed facility assessment to identify and quantify energy reduction opportunities. Implementation coordination assistance Reporting on reductions in facility energy use, cost, and greenhouse gas emissions Cash incentives based on verified energy savings SERVICES

© 2011 Customers must: Purchase gas or electricity from CPAU Own or operate a facility –Larger than 30,000 sqft, OR –With a maximum demand of 50 kW or more Have funds available to implement energy efficiency projects Hospitals High-tech facilities and labs Office buildings State and local government Retail Manufacturing Colleges and schools PROGRAM ELIGIBILITY Facilities include: Other eligibility requirements may apply. Please contact Enovity to confirm eligibility.

© 2011 Based on the one-year energy savings for a project: $0.10 per kWh saved $1.00 per therm saved One-time payment upon project verification CASH INCENTIVES

JEFF GUILD CONTACT ENOVITY Senior Project Manager Montgomery Street, Suite 600, San Francisco, CA Phone: Fax:

GENERAL PHONE NUMBER FOR ACCOUNT REPRESENTATIVES CONTACT CPAU Hamilton Avenue, Palo Alto, CA 94301

© 2011 QUESTIONS