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The fresh air system is divided into several categories according to the filter grade
2022年09月06日 更新 | 共3121人阅读
Since the outbreak of the new coronavirus, fresh air products have become one of the most concerned products of the whole people. People always think about whether it is necessary to install a fresh air system to remove viruses and bacteria in the indoor air. In addition to ventilation, the most important function of the fresh air system is to filter pollutants in the air. Therefore, the filter screen of the fresh air system is the most important part of the whole system. The quality of filter screen directly affects the quality of indoor air.
According to the filter grade, the general fresh air system filter can be divided into three levels, namely, primary efficiency filter, medium efficiency filter and high efficiency filter.
3. High efficiency filter: that is, HEPA, a filter that meets the HEPA standard.
It can filter most dust above 0.3 micron. Many fresh air systems claim that the filtering efficiency is above 99%, which is actually the detection result after filtering for several times. When you are inspecting the filtering effect of the product, you must polish your eyes.
In the fresh air system, primary, medium and high-efficiency filters are generally not used alone, but in combination of two or three. The fresh air system equipped with more than two layers of filter screens can achieve better air filtration effect.
According to the filter grade, the general fresh air system filter can be divided into three levels, namely, primary efficiency filter, medium efficiency filter and high efficiency filter.
1. Primary effect filter: filter outdoor large particle dust, insects and other substances.
3. High efficiency filter: that is, HEPA, a filter that meets the HEPA standard.
It can filter most dust above 0.3 micron. Many fresh air systems claim that the filtering efficiency is above 99%, which is actually the detection result after filtering for several times. When you are inspecting the filtering effect of the product, you must polish your eyes.
In the fresh air system, primary, medium and high-efficiency filters are generally not used alone, but in combination of two or three. The fresh air system equipped with more than two layers of filter screens can achieve better air filtration effect.