在许多应用中，过滤器厂商被迫不断提高过滤效率，使其远远超出合理水平。

　　In many applications, forced to constantly improve the filtration efficiency filter manufacturers, so that it is far beyond a reasonable level. 

　　At the same time, more and more end users begin to pay close attention to electricity costs associated with running air purification system, therefore, find balance between filtration efficiency and cost is the top priority. 

　　到目前为止，空气处理和调节在洁净室的运行成本中占的比例最大。

　　So far, air treatment and adjust in the clean room operation cost proportion is the largest. 

　　The researchers found that up to 40% of clean room operation cost and initial investment costs associated with indoor ventilation unit hour, 10 ~ 30% of the fee for air supply, the purpose is to increase the role of "clearing" air in the clean room. 

　　For filter, filtering efficiency is higher, the more trapped particle, air filter has the higher energy consumption. 

　　This fully shows the filter of the relationship between pressure drop and particle cleaning efficiency. 

　　On the one hand is the ideal way to maintain or improve the efficiency of filter material filter, on the other hand, reduce the resistance of the air flow and reduce exert on the filter pressure drop, thus saving operation costs.