• Air flap structure is optimized by aerodynamic and pressure value is higher.
  • Protection grade can reach as high as IP 55.
  • The sealing ring is using imported polyurethane material, which can last more than 10 years.
  • The flame retardant products use ASA engineering plastics which is flame retardant and also anti-ultraviolet, anti-aging and not easy to change color.
  • Certified industrial filter mats is used.