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Edward Donnelly P.E. CEM

Donnelly is a LEED™ certified senior engineer in the Washington office of the architecture and engineering firm Hayes, Seay, Mattern & Mattern, an AECOM Company. He has more than 40 years design experience, having overseen the design of more than 30 million sq ft of office and computer space in his career. Visit the Hayes, Seay, Mattern & Mattern website at


To Preserve And Protect

February 28, 2007
Older buildings need climate control, too. That’s where modernization of older structures can get challenging - maintaining the architectural integrity while performing necessary upgrades. The task of reconfiguring permanent equipment to maintain critical operations in some areas while construction happens in other zones is but another hurdle. Good planning and careful execution, along with a couple of variations on the temporary HVAC theme, can protect past craftsmanship while ensuring future comfort.
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How to Calculate Backup Power Supply Requirements for Your Facility

On-Demand This webinar reviews how to determine power requirements of facility loads; electrical characteristics and impact of different types of loads such as large motors and UPS systems on power supply sizing; acceptable power sources and other constraints applied by building codes; and how software tools can be used to simplify the process of calculating backup power requirements.  


Engineered Systems Magazine

ES April 2014 cover

2014 April

Check out the April 2014 issue of Engineered Systems, with features on backup power supply requirements, cyberattacks, and much more!

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Design Flaws

Following up on Howard McKew's April "Tomorrow's Environment" column: Have you ever thought twice about reporting problems with another firm's design? What did you do?
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The Green Energy Management Book

Learn from our experts how to evaluate job opportunities, market your services, sell a Walk-through Survey, target areas for an Energy Audit, calculate energy savings, do retrofit work, and win continuing contracts for retrofit work.

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Tomorrow's Environment Podcast

This series from longtime columnist and chronic forward-thinker Howard McKew covers a lot of ground -- from retrocommissioning to systems training, on toward checklists for drawings and tips for meeting minutes. Click HERE to be taken to the podcast page!


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