How to Install a Forced-Air Bypass Damper | This Old House
Plumbing and heating contractor Richard Trethewey quiets a whistling heating duct. (See below for a shopping list and tools.) SUBSCRIBE to This Old House: http://bit.ly/SubscribeThisOldHouse Shopping List for How to Install a Forced-Air Bypass Damper: - Bypass damper, used to quiet a noisy duct - Start collars, for attaching bypass damper to existing duct Tools…






