China Dongguan Xinlong Non Woven Machinery Equipment Co., Ltd. latest company news about Classification standard of air filters

Classification standard of air filters

June 18, 2024

Classification standard of air filters

1. European standard filter (filter efficiency color)

F5 40% ~60% white

F6 60%~80% green

F7 80%~90% pink

F8 90%~95% light yellow

F9 95%~99% white

2. National standard filter (filtration efficiency, color)

F5 40% ~60% light yellow

F6 60%~80% orange

F7 80%~90% purple

F8 90%~95% dark yellow

F9 95%~99% white

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