HVAC system manufacturer: The Unico System
Sign up for the Newsletter
Get the latest This Old House news, trusted tips, tricks, and DIY Smarts projects from our experts–straight to your inbox.
A three-story home requires three separate HVAC systems. In this video, plumbing and heating expert Richard Trethewey explains how an ingenious high-velocity mini-duct system with modular components provides continuous, quiet comfort on every level of our Dorchester Triple Decker project house.