... clean air conditioning unit, which is to protect the HEPA filter. Its media is synthetic fiber.Good performance: ... sides3. Thickness 69mm, 90mm, 110mm are available4. High efficiency mini-pleat glass fibre media5. Anodized aluminized -cell side frame6. ... low resistance, regular & stable air flow, durability.Application: Mini-pleated HEPA filters are used for the terminal filtration in environment and ...