This is an air conditioning filter bag, made of non-woven fabric. G3 and F9 represent the filtering efficiency respectively. Generally, central air conditioning or large air conditioning systems need to purify the air in the air conditioning box, and the air conditioning box needs to be replaced frequently. The function is the same as the filter screen in our home air conditioner, except that this one needs more layers and is installed in a larger air conditioner box.

Direct Baidu search air conditioning filter bags, or non-woven filter bags, you can find many suppliers. If you try to make a supply market, my answer may not help you. The technical content is still very high, and the quality of products on the market varies greatly.

I hope to add points to my experience.

Air conditioning system filter bag:

Also known as air conditioning system bag filter, according to different efficiency grades, it can be divided into G3 and G4 primary filter bags, F5, F6, F7 and F8 intermediate filter bags and F9 secondary high-efficiency filter bags. According to different materials, there are glass fiber filter bags, synthetic fiber filter bags and non-woven filter bags.

Air conditioning filter bag application:

Environmental protection ventilation engineering projects such as precision electronics industry, electronics factory, hospital, laboratory, aseptic room, aseptic workshop, national defense factory, tobacco, air conditioning system clean room, commercial building, theater, station, aviation station, painting workshop, school, computer room, etc.