The resistance of air filter istested,analysising the reasons of increasing resistance of air filtersThe ANSI/AHAM AC-1-1988 standard is introduced. Testing the air efficiencyof multifunctional air filter conducted the standard .

• 文中介绍了ANSI/AHAM AC-1-1988标准及其原理,把ANSI/AHAM AC-1-1988标准引入到空气过滤材料效率的测试领域中来。