Whole Building Retro-Commissioning at BU’s Photonics Center March 15, 2016

Photonics Center Built in 1995 275,000 sq ft B-9 Floors Mixed use: Presentation Title 5/20/2018 Photonics Center Built in 1995 275,000 sq ft B-9 Floors Mixed use: Wet labs Dry labs Clean Rooms Classrooms Offices

Base Case Building-wide simultaneous heating/cooling Presentation Title 5/20/2018 Base Case Building-wide simultaneous heating/cooling High air changes per hour (12-16+ ACH) No further capacity of exhaust system on West Side 500 1st generation VAV controllers limited memory Controllers attached to 10MB Network Controllers

Keys to Success Buy-in from upper management Presentation Title 5/20/2018 Keys to Success Buy-in from upper management Support from, and partner with, BU EHS Coordination of day-to-day space access

Technical Assistance Study Presentation Title 5/20/2018 Technical Assistance Study Eversource funded 25% National Grid funded 25% Boston University funded 50%

Technical Assistance Study Presentation Title 5/20/2018 Technical Assistance Study ECMs Identified: AHU Optimization Conference, Classroom, & Office Ventilation Reduction Lab Hood and Make-up Air Reduction Strobic Fan Motor Replacement and VFD Retrofit Boiler Controls Upgrade Chiller Plant Integration and Optimization Process Free Cooling

Savings Summary 2.2M kWh or 20% 90K Therms or 25% IRR +/- 25% Presentation Title 5/20/2018 Savings Summary 2.2M kWh or 20% 90K Therms or 25% IRR +/- 25% Savings realized by going beyond “typical” RCx and incorporate “fundamental” design changes/optimizations

Benefits Occupant comfort Operational improvements Presentation Title 5/20/2018 Benefits Occupant comfort Operational improvements “New” capacity for the future lab expansion