Articles by John Kuempel Jr. P.E.

Hydro Tech: Swiss Cheese Pump Impeller

By John Kuempel Jr. P.E.
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Don’t let cavitation put holes in your performance.

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Hydro Tech: Is It Raining In Your Boiler Combustion Chamber?

By John Kuempel Jr. P.E.
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A good boiler misapplied or improperly installed can precipitate some serious performance problems.

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Hydro Tech: The Radiant Future

By John Kuempel Jr. P.E.
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It’s not just for heating anymore.

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Hydro Tech: When Variable Flow Fails

By John Kuempel Jr. P.E.
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After a decade, this piping system went green (and not in the good way).

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Hydro Tech: Expansion Tank Tips

By John Kuempel Jr. P.E.
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They maintain an air of calm when water turns up the volume.

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ES Gallery: Snapshots & Systems

Check out highlights from projects featured in our magazine this year!
9/25/14 2:00 pm EDT

Test Anxiety? Learn How and When to Test Your Standby Generator

This webinar will discuss generator reliability, testing, and troubleshooting from a practical perspective and make recommendations for a comprehensive inspection and testing program.

Engineered Systems Magazine


2014 September

Check out the September 2014 issue of Engineered Systems, with features on radiant panels, refrigerant flow systems, and much more!

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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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