Central air conditioning cabinets generally have three levels of filtration, namely primary filtration, intermediate filtration and high efficiency filtration. The first effect protects the middle effect, and the middle effect protects the middle effect efficiently, so the replacement frequency of air filtration with middle effect and first effect is higher than that with high efficiency.

Some primary filter elements can be cleaned once every 1-2 months, and washable intermediate filter elements can be cleaned once every 2-6 months, and can also be cleaned in time according to the use situation. For the high efficiency filter, it can be replaced once a year and a half or two. The washable type can only be cleaned twice, and a new filter can be replaced after two times.

Cleaning the central air conditioner regularly and replacing the filter screen can purify the indoor environment, ensure the air quality, prevent the harm of pollutants to the human respiratory tract and make the body healthy. Save energy and reduce operating costs. Prolong service life and reduce refrigeration/heating failure of air conditioner. Reduce maintenance costs.