ECOWOOL CLASSIC VENTLINER is a highly resilient blanket type thermal and acoustical glass mineral wool made from more than 80% of recycled glass. It is designed to meet specific requirement in the HVAC equipment industry especially for the internal duct lining and other OEM applications. The glass mineral wool insulation also enhances indoor by absorbing noise within sheet metal ducts and contributes to thermal comfort by reducing heat loss or gain through duct walls.