Radiant & Hydronics

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The choice between ∆T and ∆P operation of a circulator has, at times, been the subject of rather “heated” debates. It’s almost as if a few Yankee fans are disputing superior pitching or batting performance with a few Red Sox fans. There appears to be some strong opinions involved.

The university is in the second year of a five-year project to convert its steam systems to low-temperature hot water for more efficient heating across the grounds.

All of my employees and I were sitting in our trucks eating lunch when the OSHA inspectors arrived on the commercial job site, which was a two-story addition to a nursing home. Talk about fear — the other trades and general contractor’s employees about had a coronary!

Some years ago, a wholesaler hired me to do a seminar in a New England hotel for about 100 of his contractor customers. After the seminar, the owner of the company invited me and a bunch of his employees out for a nice dinner. There were about 15 of us.

As building codes and programs such as Energy Star and Passive House require higher degrees of air sealing in new construction, the use of heat recovery ventilation (HRV) is increasing.

If you’re anything like me, the first thing that comes to mind when you think about variable speed circulators is 1970s rock band Supertramp. No? Okay, maybe you’re not like me. Either way, allow me to elucidate.

Customers can be a fickle lot. You do your best for them, but they move on in spite of your fair pricing and Johnny-on-the-spot response times.

My shop teacher was a wiry man who loved hand tools. We spent a week making a buzzer base. He taught us how to saw, sand and varnish. He introduced me to a Brace & Bit hand drill and went on and on about how this was better than an electric drill. “Can you feel the wood? It’s alive!” he said, and I could.

Nearly all closed-loop hydronic heating and cooling systems are supposed to be filled with water or a mixture of water and antifreeze. The only intentional air in the system is that contained in the expansion tank.

In Q1 2021, driveways went from 21.9% of all snow melting projects to 34.2% the following year (a rate of change of almost 141%).