Air filters are silent sufferers – no one thinks about them because they usually don’t break or make noise. Yet, they’re an important part of your HVAC system – not only helping keep your equipment clean and free of debris, but also helping to keep indoor air clean by capturing particles like dust,

Comparison Table - Filtration Performance Requirement of Different Respirator Standard等级Level 标准Standard颗粒过滤效率PFE测试介质Aerosol流量Flow(L/min)呼气阻力Exhalation Resistance(Pa)吸气阻力InhalationResistance(Pa)备注*Remark＞80%＞90%＞94%＞95%＞99%＞99.97%GB 2626-2019KN90KN95KN100NaCl85170/210/250*170/210/250*无呼气阀KP90KP9