Julius Ballanco, P.E., CPD, F-ASPE, is president of J.B. Engineering and Code Consulting, P.C. in Munster, Ind. He can be reached at by email at jbengineer@aol.com.

Veteran industry analyst and writer Morris R. Beschloss is the industrial PVF columnist for BNP Media’s Plumbing Group titles and is the American Supply Association’s industry analyst. Beschloss, whose career in the industrial pipe, valve and fittings sector spans more than five decades, was the recipient of the 2012 ASA Fred V. Keenan Lifetime Achievement Award.

Dan Holohan can be reached at Dan Holohan Associates Inc., 63 North Oakdale Ave., Bethpage, NY 11714. Dan operates the HeatingHelp.com website. Post technical challenges on The Wall and get input from the best in the business.

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.

Jacqueline Wilmot is a fire protection engineer at the National Fire Protection Association. She is the staff liaison for seven technical committees in the Fire Protection Systems and Public Fire Protection divisions.

Ray Wohlfarth is the author of “Lessons Learned in a Boiler Room: A common-sense approach to servicing and installing commercial boilers.” In his spare time, he is president of Fire & Ice in Pittsburgh. Ray writes a monthly newsletter on commercial boilers. He can be reached at 412/343-4110 or ray@fireiceheat.com.