Plumbing professional John Mullen discusses the benefits and challenges of adopting bidets in American households for environmental and hygienic reasons, as well as the importance of safety compliance and proper installation.

Thermal energy networks help buildings communicate with each other in warmth and coolness through piping networks. New columnist John Mullen explains how these shared energy networks use “waste” heat from sewage wastewater, collected stormwater or existing fire suppression systems to use elsewhere in buildings.