John Siegenthaler

John Siegenthaler, P.E., operates Appropriate Designs, a building systems engineering firm in Holland Patent, N.Y. He is the author of the course materials for the ASSE 19210, Hydronics Heating and Cooling Installer Professional Qualification Standard,, as well as the author of "Modern Hydronic Heating for Residential and Light Commercial Buildings," and “Heating With Renewable Energy” (both published by Cengage)

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