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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

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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ES Gallery: Snapshots & Systems

Check out highlights from projects featured in our magazine this year!

Engineered Systems Magazine


2015 March

Check out the March issue of ES with the cover story: High-Rise Overhaul, and features: Selecting & Installing Fire And Smoke Dampers To Ensure Code Compliance; Energy Optimization In Existing Buildings; and The Skinny On Reactors For VFDs.
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System Design

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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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Clear Seas Research

Clear Seas Research ImageWith access to over one million professionals and more than 60 industry-specific publications,Clear Seas Research offers relevant insights from those who know your industry best. Let us customize a market research solution that exceeds your marketing goals.

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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