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Articles by John Clark, P.E.

Up The Commercial Kitchen Ventilation Hood Type I Stack: No Problems Or Complaints

August 27, 2012
Leakage caused by modern cleaning techniques, evolving codes, increased airflow requirements ... kitchen ventilation design has become more complicated than the old sizing and design challenges. Of course, they’re still around, too. Grease is the word, so review these tips to keep it from popping up in the wrong places.
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HVAC In Government Buildings

January 1, 2010
A veteran engineer takes a broad look at designing and retrofitting for the several types of spaces that fall under the “government buildings” category. Weigh options for ventilation, fire safety, laboratories, and more, while considering factors like boosted head loads and the context of what was likely in place originally and why.
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Congregations In Comfort

January 1, 2008
The aesthetic aftermath of a heating system upgrade … placement of air returns for an unusually shaped space … noise levels … making economical but smart choices for an organization on a tight budget – these are issues that come into play for places of worship. Take a few lessons from the author, and earn praise instead of prayers for a better system.

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The Terrible Too's

April 1, 2007
Several of the typical “Too” adjectives sound like a list of rejected names for Snow White’s cartoon companions: Drafty, stuffy, noisy, and complicated. However, there’s (usually) nothing fake about comfort complaints, and some occupants can get animated when the situation gets too bad. Draw on this article’s wisdom to avoid ventilation mistakes that often leave facility engineers feeling grumpy, dopey, or worse.
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Thinking Inside The Big Box

August 1, 2006
From the high ceilings to the high pressures of retail timelines, large mega-retail projects can present more than an engineer might bargain for. A basic prototype gets the cart rolling, but the savvy shopper has to tailor the design to some specialized space usage, regional weather, and local codes. Throw in a permanent discount on duct dilemmas, and big box stores offer their own design "specials" on nearly every aisle.
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What Is A Loop Duct?

July 1, 2006
Glad you asked. It involves less ductwork, simpler duct runs, easier system expansion, less demolition if switching from constant volume to VAV, a maneuver for handling solar load shift, and more. For when to use it, why to use it, and how to design it, read on.
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3/27/14 11:00 am EST

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.  

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Engineered Systems Magazine

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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 ENGINEERED SYSTEMS STORE

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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 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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