John Mullen

John A. Mullen, a fourth-generation plumber, brings nearly two decades of experience and a passion for intelligent, sustainable systems to the plumbing and mechanical industry. From apprentice to executive, he has led many complex projects and driven industry-wide safety and compliance initiatives. Mullen’s dedication to the field continues to drive forward the tradition of ensuring safe and efficient plumbing systems for the public.

The Future Is Now

Liquid-Cooled Data: Balancing Innovation and Sustainability

It is the simplest and most elegant solution to a carbon-neutral future.

November 1, 2024

John Mullen

Today’s data storage centers require considerable amounts of additional energy. Air-cooled systems have been the norm for data storage; however, liquid-cooled systems can handle greater internal heat displacement. This makes them ideal for energy-hungry AI tasks and preserving electricity.

The Future Is Now

Long Live the Bidet

Why won’t Americans adopt this environmentally hygienic habit?

October 24, 2024

John Mullen

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.

The Future Is Now

Water, Entropy and the Future of Energy Management

With unparalleled capacity to store and transfer energy, water can be a viable solution to a sustainable and resilient world

September 2, 2024

John Mullen

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.