How to Choose the Most Efficient Boiler | This Old House

Published 2020-11-02

The heating bill for the Arlington house reached the thousands. Richard Trethewey and Kevin Bilo are installing a new heating system that will take a huge bite out of that bill. At the heart of the new system is a state of art boiler that goes in today

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The Arlington house will soon be more efficient now that there’s a new boiler getting hooked up. Richard Trethewey shows how old condensing boilers get clogged with sludge in the heat exchanger and burner parts of the system. Newer heating units address the sludge issue with a better design so there’s no place for it to collect. The flue gas gets vented out a plastic pipe through the inside of the house and then up through the roof at the back of the house. Richard and plumber Kevin Bilo connect the flue pipe to the new boiler. There is still much to be done to install the new boiler. Supply and return lines will be run to mixing valves, pumps, and manifolds to connect to radiators and radiant floor heat. Additional piping will feed the hot water tank. This efficient system will work well for a remodeled home.

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This Old House is America’s first and most trusted home improvement show. Each season, we renovate two different historic homes—one step at a time—featuring quality craftsmanship and the latest in modern technology. We demystify home improvement and provide ideas and information so, whether you are doing it yourself or hiring out contractors, you’ll know the right way to do things or the questions to ask. Our experts including general contractor Tom Silva, plumbing and heating expert Richard Trethewey, landscape contractor Jenn Nawada, master carpenter Norm Abram, and host Kevin O’Connor give you the tools you need to protect and preserve your greatest investment—your home.

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How to Choose the Most Efficient Boiler | This Old House
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