Abstract
The preliminary experiments were tried to obtain the basic data for determination of the air-cleaner evaluation method on removability of airborne microbes. An examination room for spray of living microorganisms was prepared, the spores of Wallemia sebi and Penicillium frequentans were prepared for the spray, a nebulizer method and an ultrasound method were adopted for spray of the spores, and gelatin filters were used for sampling of the scattered spores in the air of the examination room. Both nebulizer method and the ultrasound method were applicable for spray of spores. The preliminary evaluation tests on removability of airborne microbes were tried on a commercially available air cleaner. Although the decreasing effect of airborne microbes with the filter was detected, the decreasing effect was not detected with the emission of cluster ions at the air cleaner.
