John Siegenthaler, P.E., is a consulting engineer and principal of Appropriate Designs, in Holland Patent, New York. In partnership with HeatSpring, he has developed several online courses that provide in-depth design-level training in modern hydronic systems, air-to-water heat pumps and biomass boiler systems. Additional information and resources for hydronic system design are available on Siegenthaler's website at www.hydronicpros.com.
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