or your problem persists when the damper is wide open, you may have a major duct-work design problem. The duct system in your house acts like the blood vessels in your body. The size of the artery ...

But now we’re going national.” Duro Dyne has sold contractors round duct access, grease trap and other fabricated sheet metal doors for years now, but expanded their offerings by acquiring the rights ...

When the handle is parallel to the duct, the damper is typically open. During winter, partially close the damper in the ducts leading to rooms that are too warm and make sure the other ones are ...