they are as resistant as metal gratings but much lighter. They also have the advantage of being self-extinguishing following the use of special insulating resins such as isophthalic, vinyl ester and acrylic resin.
From H11 to H14 filtration efficiency, high efficiency, but low pressure drop. Composite with pp spun bond, melt blown, glass fiber, PET spun bond, for dust, pollen, mold spores, dust mites, and other allergens. Generally, it is made to panel filter, cart