There is a growing interest in adding air-to-water heat pumps to existing hydronic heating systems. While I support their use, I do not recommend replacing a perfectly good cast-iron boiler that still has a long service life.

The installer is tasked with setting up a three-zone radiant floor heating system using a 5-ton geothermal heat pump and a mod/con boiler, connected through a primary-secondary system with closely spaced tees. The system includes 4 earth loops of 1” HDPE tubing, each 500 feet long, supplying the heat pump, and features underfloor tubing with aluminum plates.

Sooke School District responded to the influx of young families by swiftly constructing schools for 1,200 students. These LEED v4 Gold-certified buildings seamlessly integrated into the landscape, featuring photovoltaic panels, geothermal HVAC, and district heating for efficiency. Underground piping ensured optimal comfort while minimizing waste.

The 20 products highlighted here have earned the distinction of being Plumbing & Mechanical’s Top Products of 2023 based on the number of pageviews on www.pmmag.com. Congratulations to those products on this year’s list.

Keystone Air Power is a thriving Amish enterprise that runs a fully modern hardware store in Central Pennsylvania. The 52,000-square-foot building is constructed around a cutting-edge, off-grid mechanical and electrical system that demonstrates the Amish's knowledge of smart technology.

Find out about piping options for retrofitting an air-to-water heat pump into an existing hydronic system.

Medairos has over 40 years of experience of expertise in engineering, project management and planning.

While electrification can help meet decarbonization goals, high-efficiency condensing boilers are also a possible solution to bridge the gap between where we are now and where we are heading.

There is no shortage of industry patrons who’ve been impacted by Dan Holohan — manufacturers, reps, plumbers, and fellow writers alike. His love for teaching, writing, giving back and just undeniable kindness have left a mark.

Mike Guglielmo, a 30-year industry veteran, is currently working on a radiant heating project for a 9,200-square-foot luxury log cabin, located about 40 minutes outside of Easton, Pennsylvania, across the New Jersey border.