1. ASHRAE Club Project VAV Fumehood Retrofit - Engineering III Building Engineering III Building 40,000 gsf Completed 2002 Designed and constructed in two phases due to budget limitations Phase I Engineer: Affiliated Engineers Walnut Creek Phase II Engineer: Brummell Myrick San Luis Obispo

2. ASHRAE Club Project VAV Fumehood Retrofit - Engineering III Building Project Phasing Phase I: Building shell Building shell Major equipment Major equipment Main supply/return/exhaust ductwork Main supply/return/exhaust ductwork Phase II: Interior finishes Interior finishes Terminal units & zone ductwork Terminal units & zone ductwork Controls Controls

3. ASHRAE Club Project VAV Fumehood Retrofit - Engineering III Building Differences in Design Approach Building systems: VAV reheat system VAV reheat system 2 AHU’s 2 AHU’s Offices and labs – heating, cooling, and economizer Offices and labs – heating, cooling, and economizer Shop spaces – heating only, 100% outside air Shop spaces – heating only, 100% outside air Constant volume fume hoods, variable volume exhaust Constant volume fume hoods, variable volume exhaust Phase I designer approach: Common exhaust system serving all lab fume hoods Common exhaust system serving all lab fume hoods Makeup air damper on exhaust fan to ensure minimum stack velocity Makeup air damper on exhaust fan to ensure minimum stack velocity Phase II designer approach: Concerned about fume hood chemical compatibility Concerned about fume hood chemical compatibility Separate dedicated exhaust fans for each fume hood Separate dedicated exhaust fans for each fume hood Results in main exhaust fan being oversized Results in main exhaust fan being oversized

4. ASHRAE Club Project VAV Fumehood Retrofit - Engineering III Building Phase I Design - System Schematic

5. ASHRAE Club Project VAV Fumehood Retrofit - Engineering III Building Phase II Design - System Schematic

6. ASHRAE Club Project VAV Fumehood Retrofit - Engineering III Building Project Goals Convert constant volume fume hoods to VAV Convert constant volume fume hoods to VAV Develop project proposal, scope of work, plans, and new sequences of operation Develop project proposal, scope of work, plans, and new sequences of operation Calculate project cost, energy savings, and payback Calculate project cost, energy savings, and payback Obtain utility rebates from PG&E and So Cal Gas Obtain utility rebates from PG&E and So Cal Gas Propose to campus, and get approval for necessary funding Propose to campus, and get approval for necessary funding Install and commission Install and commission

7. ASHRAE Club Project VAV Fumehood Retrofit - Engineering III Building Design Issues to be Evaluated Leave hoods on dedicated fans or reconnect to main exhaust system? Leave hoods on dedicated fans or reconnect to main exhaust system? Are all materials used in hoods chemically compatible and safe to mix? Are all materials used in hoods chemically compatible and safe to mix? What is the best control approach? Aircuity vs. Siemens? Pheonix valves vs. butterfly valves? What is the best control approach? Aircuity vs. Siemens? Pheonix valves vs. butterfly valves? Are there any other operational or commissioning issues that need to be resolved? Are there any other operational or commissioning issues that need to be resolved? Evaluate capital cost, payback, and life cycle cost of each option. Evaluate capital cost, payback, and life cycle cost of each option.

8. ASHRAE Club Project VAV Fumehood Retrofit - Engineering III Building Next Steps Building tour next week – Thursday Jan 14 at 11:00 – meet in Eng III courtyard Building tour next week – Thursday Jan 14 at 11:00 – meet in Eng III courtyard Study building plans and sequences of operation Study building plans and sequences of operation Talk to building technician, lab users, and EH&S about hood user needs and chemicals used Talk to building technician, lab users, and EH&S about hood user needs and chemicals used Talk to building engineers about building operational issues regarding temperature control, building pressurization, maintenance issues Talk to building engineers about building operational issues regarding temperature control, building pressurization, maintenance issues Determine analysis and design tasks that are necessary Determine analysis and design tasks that are necessary Survey system, record equipment data, take measurements Survey system, record equipment data, take measurements Organize teams and delegate tasks Organize teams and delegate tasks

9. ASHRAE Club Project VAV Fumehood Retrofit - Engineering III Building Resources Building plans: http://www.afd.calpoly.edu/facilities/maps_eplanroom.asp?pid=7 Building plans: http://www.afd.calpoly.edu/facilities/maps_eplanroom.asp?pid=7 http://www.afd.calpoly.edu/facilities/maps_eplanroom.asp?pid=7 HVAC zoning and locations of equipment: http://www.afd.calpoly.edu/facilities/maps_floorplans.asp?pid=7 HVAC zoning and locations of equipment: http://www.afd.calpoly.edu/facilities/maps_floorplans.asp?pid=7 http://www.afd.calpoly.edu/facilities/maps_floorplans.asp?pid=7 Facility Services Facility Services Brummel Myrick Engineers Brummel Myrick Engineers Rumsey Engineers Rumsey Engineers George Yardley Company (Aircuity and Phoenix) George Yardley Company (Aircuity and Phoenix) Siemens Siemens