Air filters are manufactured with low-resistance micro-fine glass-fiber and rational compact construction. They are designed for final filtration in supply or exhaust system of clean-room applications and HVAC duct, and suitable for all applications of face velocity up to 3.0m/s on account of large filter surface.

If stained with water, air filters would have shorter operation time with unstable efficiency; Therefore Coflair filters should not to be installed near to humidifier and heat exchanger behind which board to keep off the water should be installed.
To extend lifetime of Coflair air filter, pre-filters classified not lower than F7 should be used to reduce dust density of upstream air.