How to Install Room-By-Room Zoning in an HVAC System | Ask This Old House
Ask This Old House plumbing expert Richard Trethewey learns about an HVAC system that allows each room to be zoned out using smartphone technology. SUBSCRIBE to This Old House: http://bit.ly/SubscribeThisOldHouse About Ask This Old House TV: Homeowners have a virtual truckload of questions for us on smaller projects, and we're ready to answer. Ask This…