ISOVER features remedies with Top mineral wool that provide fire resistance to metal ductwork whilst offering thermal and acoustic Added benefits. Promat has created self-supporting techniques with out a steel liner, as an example PROMATECT®-AD, PROMATECT®-L500 and MASTERBOARD®, which can match the leakage and air move performance of metal ducts https://andyewkzo.blogchaat.com/37050624/about-grease-tight-extract-ductwork