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John Siegenthaler, P.E.

Siegenthaler is principal of Appropriate Designs, a consulting engineering firm in Holland Patent, NY. The second edition of his text, Modern Hydronic Heating, and recently released software, Hydronics Design Studio, are now available through


Multiple MOD/CONS

June 1, 2007
Quick adjustment to high demand. Simpler transport. Attractive installation and mounting profiles. These and other benefits can accompany a multiple-boiler strategy, especially if you follow some tips on piping and sensor placement. Review what may become a new paradigm as popularity increases in North America.
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Passionate Professionalism

March 1, 2007
A boiler retrofit will only do so much good if the rest of the system is in dire straits. This Brooklyn school benefited from engineers making the case to go beyond simple replacement and look at the big picture. New boilers, piping, and separators combined to provide real efficiency as well as a starting point for a building-wide controls upgrade.
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Image Galleries

ES Gallery: Snapshots & Systems

Check out highlights from projects featured in our magazine this year!
3/25/14 2:00 pm EST

Improving Cooling and PUE in Existing Data Centers

On-Demand This webinar will provide cost-effective practical tips and feasible retrofit solutions that can be implemented in operational data centers to address some cooling issues and improve energy efficiency.


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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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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