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 hydronics systems, air-to-water heat pumps and biomass boiler systems. Additional information and resources for hydronic system design are available on Siegenthaler’s website,  www.hydronicpros.com.

James Dipping, PE, CPD, GPD, LEED AP BD+C, ARCSA AP, technical director, plumbing engineering for Chicago-based ESD, has more than 25 years of experience a plumbing engineer, and serves on the ASPE Legionella Design Guide Working Group.

Misty Guard, MSPP, is president of Regulosity in Milwaukee, Wisconsin. She assists international and domestic companies to obtain and maintain market access for products worldwide. She creates solutions that support businesses to achieve compliance with laws, regulations, codes, standards and public policies. Follow her on Twitter and LinkedIn. She can be reached by email at info@regulosity.com.

Christoph Lohr, P.E., CPD, ASSE 12080, is the is vice president of technical services and research. All views and opinions expressed in this article are his alone. Have some thoughts on this article? Contact Christoph at christoph.lohr@iapmo.org.

Lowell Manalo is the plumbing discipline leader and principal at SmithGroup. He is a member of ASPE and has more than 20 years of experience designing plumbing systems for various building types.

David D. Dexter, FNSPE, FASPE, CPD, CPI, CPE, LEED BD+C, PE, is a registered professional engineer, certified plumbing inspector and plans examiner and master plumber. He has more than 40 years of experience in the installation and design of plumbing systems, specializing in plumbing, fire protection and HVAC design as well as forensics related to mechanical system failures. Dexter also chairs ASPE’s Main Design Standards Committee and the ASPE Bylaws Committee.