A design engineer invited me to a school building for a challenging project. I found an old boiler with several leaks and a tight budget. The system was a two-pipe system that circulated heated water during winter and chilled water during summer. The owner wanted lower fuel costs and a quicker changeover between heating and cooling.
Historically specified and installed as radiant heating and cooling or snow- and ice-melting systems pipe, PEX is now trending as a viable hydronic distribution pipe for heating hot water and chilled water applications.
This newest edition discusses the physical processes at work in hydronic systems and presents a process for troubleshooting issues in residential and light commercial settings.