Each of them is tested by flame method, which has the characteristics of high filtration efficiency, low resistance and large dust capacity. the high efficiency air filter can be widely used in optical electronics, LCD liquid crystal manufacturing, biomedicine, precision instruments, beverage food, PCB printing and other industries dust-free purification workshop air-conditioning terminal air supply. High efficiency and ultra-high efficiency filters are used in the end of clean room, which can be divided into: partition high efficiency filter, no partition high efficiency filter, large air volume high efficiency filter, ultra-high efficiency filter and so on.
There's also the HEPA which is a localised clean air solution. It is adaptable, economical, and efficient. It operates by maintaining quality of air at points where products are exposed, thus removing the need for a cleanroom to enclose the entire production line.