Kevin O'Connor meets Richard Trethewey in the Belmont Victorian basement to discuss the HVAC plan.

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Kevin O'Connor meets Richard Trethewey in the Belmont Victorian basement and learns about the plan to keep the existing boiler but add air handlers and a condenser for air conditioning.

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his 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 Duct and Zone an HVAC System | This Old House
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