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Last month's column discussed piping for air-to-water heat pumps. A 2-pipe system allows staging but not simultaneous heating and cooling, while a 4-pipe system with motorized valves enables both modes of operation.

Formaldehyde, vital in resins and adhesives, poses serious health risks, with the U.S. EPA identifying 58 unsafe uses. Regulatory action is needed, but the impact of a potential second Trump administration on these regulations remains uncertain, highlighting concerns for public safety.

The Kitchen and Bath Industry Show (KBIS) will be held at the Las Vegas Convention Center from February 25-27, featuring over 670 exhibitors and showcasing innovative, sustainable products. KBIS 2025 is slated to be the largest show in history.

The AHR Expo, scheduled for February 10-12 in Orlando, will showcase trends like decarbonization and A2L refrigerants, with 1,865 exhibitors including Caleffi North America. Attendees can connect with experts and explore new products, while the Podcast Pavilion celebrates its five-year anniversary.

After five years with Supply House Times, Natalie Forster gained valuable insights into the supply chain and developed relationships with PHCP-PVF wholesalers. Now, as the new Editorial Director for both Supply House Times and Plumbing & Mechanical, she'll engage daily with all supply chain participants, including wholesalers, contractors, and engineers.

Discussions about wet venting in plumbing often spark heated debates, but if you're competing against a plumber who effectively utilizes it, you may lose bids by venting every fixture. Wet venting allows for a more efficient use of materials and labor, making bids more competitive.

Last month, we started with an air-to-water heat pump for space heating and added an auxiliary heat source and chilled water cooling. This month, we’re adding domestic water heating, similar to last month’s setup.

An emergency call led a team to a school with a leaking boiler, which was shut down due to safety concerns. After clarifying the need for urgent repairs, the executive director approved the work. Complications arose from snow and transport challenges, but a friend connected them with a group of young workers willing to help, easing manpower concerns.

This is the latest RIDGID investment into their 27-acre campus that includes their world headquarters, as well as a 463,000 square foot manufacturing facility, state-of-the-art technology lab, customer training center, and an authorized service center.

Occupants of a building using a hydro-split air-to-water heat pump are facing slow recovery after night setbacks and inadequate hot water during peak demand. The system, composed of an outdoor and indoor unit, struggles with heating efficiency. What improvements could enhance its performance?