COMMISSIONING: REDUCING THE CARBON FOOTPRINT(…and Maintenance Costs) (…and Operating Costs)

Existing Building Commissioning

What is Commissioning?Existing Building Commissioning is defined as:

An organized process whereby the performance of selected building systems are verified and documented in order to identify energy and operational cost reduction opportunities and to improve overall building performance.

Typical Commissioned Systems:• Mechanical

• HVAC• Controls

• Electrical• Emergency Power Equipment

• Fire & Life Safety• Fire Alarm System

Existing Building Commissioning

Purpose & Goals of EB-Commissioning:• Identifying Potential Energy Savings• Improving Indoor Air Quality (IAQ)• Improving Guest Comfort• Eliminating Known Issues• Meeting the Demands of a Change• Reducing Maintenance Costs• Improving Systems/Equipment Documentation

Existing Building Commissioning

Procedures of EB-Commissioning:• Owner Interview

• Project’s History & Future• Document Review

• Site Investigation• Data Collection• Observation of Performance• Trending• Current Energy Bills

• Analysis• Data from Trends• Energy Bills• Maintenance Records

• Findings Report• Investigation Findings• Recommendations

• Implementation

Existing Building Commissioning

Typical Commissioning Findings:• Equipment Issues

• Equipment not functioning correctly• Equipment not functioning at all• Older equipment with poor efficiency ratings

• Controls Issues• Sensors out of calibration• Programming errors (or emissions)• Wiring or connection issues

• Maintenance Issues• Poor maintenance• Improper maintenance

Existing Building Commissioning

Commissioning Costs & ROI:• Typical Costs of EB-Commissioning

• $0.10 - $0.25/Square Foot, based on type of systems• Contract by Scope

• Investigation Phase• Implementation Phase

• Typical Return On Investment• 0 to 4 months for most (low hanging fruit)• 6 months to 2 years (equipment replacement)

Existing Building Commissioning Item

BuildingMeasure Description Cost Savings Simple Payback

1 Extended Surface Filters $10,700 $18,000 0.6 years2 HVAC Scheduling & Flow

Settings $35,000 $86,800 0.4 years3 Excessive simultaneous

heating and cooling $17,300 $23,000 0.75 years

4 Hospital Pump Impellers $6,700 $6,700 1 year

5 By-Pass Timers $3,500 $65,800 0.05 years6 Supply Air Temperature

Setpoints $700 $5,000 0.14 years

7 Long Term Care Facility

Enable Economizer Controls $3,600 $4,700 0.8 years

8 Scheduling Equipment and Lights $0 $66,400 Immediate

9 Economizer Settings $0 $17,000 Immediate10 Static Pressure Reset $0 $7,500 Immediate

11 Oregon Office EMS Control of Duct Heaters $0 $3,700 Immediate

12 Colorado Retail EMS Night Purge and Optimum Stop/Start Strategies $0 $5,000 Immediate

13 Tennessee Office Chilled Water Pump VFD, Piping System Leaks, and By-Passes $9,300 $24,300 0.3 years

14 Massachusetts Retail

Battery Charging Schedule Changes $0 $3,700 Immediate

Totals $86,800 $337,600 0.26 years

High Tech

Coronor's Office

Corporate Office

* Based on case studies performed by Portland Energy Conservation Inc. (PECI), 2000

Existing Building Commissioning

Benefits of Commissioning:• Reduction in Energy Costs

• Better efficiency equals lower operating costs• Reduction in Maintenance Costs

• Fine tuning eliminates emergency repairs and allows for scheduled preventive maintenance

• Improved IAQ• Optimum operating systems create a healthy environment

with verified and documented OSA • Improved Guest Comfort

• Proper operating systems create a healthy environment• Verification of functioning systems reduces occupant

complaints

Existing Building Commissioning

EB-Cx Questions

Existing Building Commissioning

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