While, the key disadvantage to rigid ducts is they don’t get the job done very well in tricky Areas. Rigid ductwork could be categorized based on the material They can be manufactured outside of, with a few principal kinds currently being sheet metal ducts, fiberglass lined ducts, and fiberboard ducts. https://ducttapemummification11110.idblogmaker.com/34943863/a-review-of-duct-tape-mummification