When I look at any replacement hydronic boiler project, my tenet is always to assume the existing system is installed improperly. I like to pretend I am a famous detective, such as Sherlock Holmes, and my job is to uncover the hidden mistakes.

The 1970s bestseller “Zen and the Art of Motorcycle Maintenance: An Inquiry into Values” used the author’s experience repairing a motorcycle on a cross-country trip to explore competing approaches to life.

Unlike their traditional storage tank-based counterparts, tankless water heaters are capable of providing a constant flow of hot water on-demand. The concept is relatively simple: The heaters function by coupling a modulating burner with a high-efficiency heat exchanger.

An installer was asked to include an air-to-water heat pump into a low-temperature radiant panel heating system supplied by a mod/con boiler.

In 1989 when we started our business, The Lovely Marianne asked me what I was going to do to make money for her and our four daughters. I told her I was going to write books, but it would take some time to do that.

The following five stories are the most-viewed stories on www.pmmag.com for the month of April.

John Pughe is a long-time colleague of mine and a true hydronics professional. He recently sent me an  “as installed” and “as corrected” schematic for a hydronic heating system with twin 200,000 Btu/hr mod/con boilers, and 15 zones, each powered by its own circulator.

Stay above the dew point.

Not maintaining this valve could destroy the heating system.