This Old House - Season 27 - Eps 6: Cambridge | High-Tech Heating and Cooling
Master carpenter Norm Abram and host Kevin O'Connor open the show at Cambridge Common — the city's oldest public open space and a center of rebel activity in the early years of the American Revolution. Back at the project house, Kevin lends Norm and general contractor Tom Silva a hand framing in the "not quite flat" roof above the library — it has a slight pitch to shed water. Plumbing and heating expert Richard Trethewey shows Kevin a new software program that allows him to design the HVAC system on a laptop and run heat loss scenarios for the house while changing variables like windows, insulation, and various kinds of ductwork and heating. Landscape contractor Roger Cook brings homeowner George Mabry to one of the largest stone yards on the East coast to begin selecting hardscape materials for the landscape.
About This Old House

Title: This Old House
First Air Date: 1979-01-01
Last Air Date: 2025-05-29
Status: Returning Series
Rating: 5.4/10 (from 34 votes)
Language: EN
Seasons: 47
Total Episodes: 1188
Network: PBS
Genres: Documentary, Reality
Production Companies: This Old House Productions
Synopsis
TV's original home-improvement show, following one whole-house renovation over several episodes.