GENUINE | PROGRESSIVE | ADVOCATES

SEASONAL COMMISSIONING

Presented By: Andrew Thompson, P.E., HBDP, CxA, CEM, LEED-APPrincipal

Ryan Tushner, P.E., CxA, LEED-AP BD+CSenior Cx Agent

High Performance Building Design ConsultantsSERVICES:• High-Performance Engineering• Commissioning & Energy Consulting• Green Building Consulting• Building Simulation & Analysis• Human Inquiry• Design Build

QUALIFICATIONS:• 60 Staff Members and 6 Offices• 21 Professional Engineers• 14 Commissioning Professionals• 3 High-Performance Building Design Professionals

LOCAL NEBRASKA PROJECTS• Ehrling Bergquist Hospital, Offutt AFB, Bellevue, NE LEED Silver Certified• Bergan Mercy Medical Center, Omaha, NE• Pender Community Hospital, Pender, NE

CURRENT/RECENT PROJECTS

NATIONAL PROJECTS• Colorado Springs Outpatient Clinic, Colorado Springs, CO• San Antonio Military Medical Center, San Antonio, TX• Eglin AFB Hospital Realignment, Eglin AFB, FL Pursuing LEED Certification

HEALTHCARE PROJECTS• 85+ Healthcare Projects• 40+ Healthcare Commissioning Projects• 15 LEED Certified/Pursuing

Recent Healthcare Experience

• New Building Cx– Verify that everything works the way it

was intended• Re-Cx

– Re-align building systems with current use

– Systematically check system performance

• Retro-Cx– Actively reduce energy use through

system tuning– Implement Facility Improvement

Measures• Seasonal Cx

– Combination of many flavors but in small scoops

What’s your flavor?

Let’s Rank them:

Operating Costs System Reliability Patient Satisfaction Code

Requirements / Certifications

Other

What are your pressure points?

Energy Savings Comfort Reliability Relieves pressure points Small adjustments with big impacts

The value of seasonal Cx?

What is Seasonal Cx?

• Simple Cx activities with big impacts• Adjust for use changes• Control point check• Optimizing systems• System reliability checks• Functional performance test a system

• Don’t hit the reset button• Review department moves over the past year

– Update occupancy schedule– Review exhaust requirements– Review ventilation air requirements– Review pressure relationship requirements

• Example:– Medical offices move into therapy gym– 1000 CFM exhaust runs year round– This equates to 5 Dallas Stadiums

Adjust for Use Changes

Control Point Check

• Impact of a bad sensor or incorrect control point can be huge• Incorporate sensor checks into daily activities with the use of

trending

Optimizing Systems

• Air Terminal Boxes– Minimum flow settings– Occupied / Unoccupied Schedules– Temperature Deadband

Figure 1 Figure 2

* ASHRAE Journal May 2010

• 180,000 SF Hospital resulted in $100,000 energy savings / yr

Optimizing Systems

• Outside Air– Flow quantity verification– Control sequences (verify damper operation)– Economizer

• High and Low limit pressure safeties– Simple process– Mag Pressure Gauge – Air pressure

System Reliability Checks

• Freeze-stat checks– Mitigate significant risk– Simple process

• Ice bucket with a wet rag

• Control System UPS– Is there a UPS?– Is the UPS functional?

System Reliability Checks

• Pick a system of concern to focus on that year– Seasonal choices may be hot or chilled water systems– Example of Air Handling Unit FPT (link to FPT)

Functional Performance Test

• Look at what can be accomplished in-house first (? /SF)• Contracted Seasonal Cx = $0.15 - $0.60 / SF • Contracted Re-Cx = $0.30 - $0.90 / SF

Cost

Questions