1. Data Center Infrastructure Total System Effectiveness Matt Gleason, CoreSite Jim Hughes, Mitsubishi Electrical Power Products

2. CoreSite | Who We Are 2 NYSE traded with a strong balance sheet Scalable, broad platform in Tier-1 markets Dense network connectivity and ecosystems Product, services and operational excellence  Founded in 2001 by The Carlyle Group  NYSE: COR (2010); REIT status  Equity market cap $1.1 billion  Growth capacity 11% debt to enterprise value at 9/30/12  14 data centers  9 top North American data center markets located in network, financial, cloud and commerce hubs  Global expansion available through alliance network  2+ million square feet  Ability to nearly double data center footprint  300+ employees  Over 275 network deployments  Over 750 customers and 15,000 cross- connects  Key ecosystems of customers and partners consisting of 30% service providers, 21% cloud, 49% content and enterprise  Global alliances offering reach to EMEA, AsiaPac, and LatAm markets  Cabinet, standard or custom cage, computer rooms, full building  XCs, Any2 Internet exchange, Cloud Exchange – Ethernet  Breakered and metered power  Partner enabled value- added services

3. Nine markets – leading network, cloud, financial and commercial hubs Highly Scalable Data Center Platform 3 Los Angeles San Francisco Bay Area Northern Virginia Washington, DC Boston Chicago New Jersey New York Miami Denver

4. 99.9999% UPTIME TIER III INFRASTRUCTURE LEED GOLD CERTIFIED BY USGBC ENERGY STAR RATED ENERGY INNOVATOR AWARD SSAE 16 TYPE 2 COMPLIANCE 24 HOUR CoreSite Commitment to Quality 4 DATA CENTER MONITORING OPERATIONS SUPPORT CENTER

5. Santa Clara Project Goals – Conceptual  Minimize initial infrastructure costs  Minimize footprint  Minimize operating costs  Minimize time-to-completion  Maximize flexibility  Maximize reliability 5

6. Santa Clara Project Goals – Tangible  Install and test base infrastructure equipment in less than 90 days from time of order  Achieve 99.9999% uptime  Create configurations that can quickly adapt to N+1 or 2N  Reach PUE of 1.35 regardless of the load at the facility  Reduce initial costs and operating costs from our previous designs 6

7. Santa Clara Project Results  Data centers are ready for customers 90 days from time of order  Interconnecting installation time reduced from 2 weeks to 2 days for 1.5 MW UPS  PUE of 1.35 achieved  5 year TCO reduced by $273K per 1.5 MW of Critical Load Design  Customers have a choice of N+1 or 2N power 7

8. Confidential UPS Power

9. Confidential UPS Power  Start with the UPS  9900B-500kVA UPS  3X500 kVA capacity system expandable to a 4X500 kVA redundant system  True On-Line Double Conversion UPS system  1.1 : 1 generator compatibility ratio  Proven design in the industry with excellent specifications and reliability factors  Energy Star Certified

10. Confidential UPS Efficiency  Start with the UPS  9900B-500kVA UPS - efficiency

11. Confidential UPS Batteries  Batteries  Eastpenn HR7500 Front terminal VRLA design  (2) strings to provide 5 minute runtime at full load  Compact design using high quality battery cabinets  Batteries tank formed to reduce warranty claims and increase reliability  Include battery monitoring and IFC 608 Compliance

12. Confidential UPS Power  Batteries

13. Confidential UPS Switchboards  Switchboards  Uses Square D breakers  Designed by Mitsubishi with assistance from factory engineering  UL891 listed  Includes: Input switchboard, bypass input switchboard, UPS isolation breakers, 2 breaker bypass and output distribution

14. Confidential UPS : Small Footprint  Next step – Lineup  To minimize footprint, the UPS will be installed back to back with the switchboard  Benefits Installation time is reduced

15. Confidential UPS: Final Results

16. Confidential UPS Power

17. Confidential UPS Power

18. Confidential Success: TCO  Results  MegaPOD®

19. Confidential Successful Outcome  Results  MegaPOD® installed in 2 days versus 2 weeks with the previous design  5 year TCO reduced by $273,334 Initial costs reduced by $93,607 Operating costs reduced by $179,730  Other Benefits Smaller footprint Less Heat Rejection 1.1:1 Generator compatibility

20. Confidential UPS Power-Next Generation  Next step – Lineup – Second Generation

21. Confidential Thank You