Stay Connected with Engineered Systems
We are on Facebook, Twitter, LinkedIn, etc.

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

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.
Read More

Passionate Professionalism

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.
Read More



Image Galleries

ES Gallery: Snapshots & Systems

Check out highlights from projects featured in our magazine this year!
5/13/15 11:00 am EDT

When's & Why's of Fuel Options and Selection for Backup Power

ON DEMAND This presentation will bring listeners up to speed on what the best options are today and in the near future. 

Engineered Systems Magazine


2015 May

Check out the May issue of ES with the cover story: VRF with Heat Recovery Ventilation In PreK-12 Schools.

Table Of Contents Subscribe

System Design

Based on your experience and knowledge level, are you currently comfortable designing or maintaining a system incorporating VRF or radiant ceiling panels?
View Results Poll Archive


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.

More Products

Clear Seas Research

With 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!


new Facebook icon Twitter icon YouTube iconLinkedIn icon  Google+