Researchers have shown that fabric ducts, like this red DuctSox installation, distribute air 24.5% more efficiently than metal ductwork.
Photo: DuctSox
Seals at window openings and other penetrations need to be done right the first time. Are your seals failing because of the most common application error—forgetting the bond break?
Any four walls and a roof make an enclosure, but for efficiency, comfort, and durability, those elements have to be meticulously designed and installed.