1 Biogen | Confidential and Proprietary 15MAR16 Building 8 Retro-Commissioning & Optimization

2 Biogen | Confidential and Proprietary Biogen Building 8

3 Biogen | Confidential and Proprietary Constructed In ,000SF 100% Outdoor Air Design 3 Central Matched Supply/Exhaust AHUs Labs Have Heavy Equipment Heat Loads Typical Energy Profile o 1,500-3,200 KW o 5,000-20,000 PPH Steam Biogen Building 8

4 Biogen | Confidential and Proprietary Loss Of Infrastructure Redundancy Largest Energy Consumer – 37% Of Campus Very Conservatively Designed (High ACH) Labs Have Heavy Equipment Loads Typical Energy Loads o 1,500-3,200 KW o 5,000-20,000 PPH Steam No Major Renovations Planned Why Start Here?

5 Biogen | Confidential and Proprietary A Biogen First A Costly Endeavour Fully Occupied Building o Do Not Disrupt Operations Who Is The Best Partner To Work With o Numerous Trades Needed The Challenges

6 Biogen | Confidential and Proprietary Managed And Coordinated As A Construction Project With Numerous Trades o TABB Balancer o BMS Vendor o Phoenix Vendor o Sheet Metal Contractor o CAD Crew o Mechanical Engineering The Approach

7 Biogen | Confidential and Proprietary Conducted Over Two (7) Month Windows In 2014 and 2015 Wave Approach On A Floor By Floor Basis o Wave 1: Asses, Triage And Document o Wave 2: Restore And Verify o Wave 3: Adjust And Optimize o Wave 4: Measure, Confirm And Document The Approach

8 Biogen | Confidential and Proprietary First Floor Or Two Were Slow Out Of The Gate While The Wave Approach Was Honed. Well Oiled Machine By The Third Floor A Substantial Amount Of Repairs Were Needed o BMS, Phoenix, And Sheet Metal o Legacy BMS and Analog Phoenix System o Skeletons In The Closet From Day 1 The Results

9 Biogen | Confidential and Proprietary Exceeded Expectations o Regained Lost Chiller Redundancy o Dual Fan Units Now 80% Redundant At Peak o Average Airflow Reduction 105,000 CFM o Annual Electrical Savings 1,229,250 KWH o Annual Gas Savings 109,325 Therms (Steam Basis) o Each Phase Received A Sizeable Eversource Energy Efficiency Incentive. o Simple ROI = 4.0 Years! The Results

10 Biogen | Confidential and Proprietary Partners