Abstract
The evaluation tests on removing performance of airborne microbes were tried with a commercially available air cleaner. A simplified examination room with negative air-pressure was assembled in a room in a laboratory. The spores of fungi, Wallemia sebi or Penicillium glabrum, were spread in the examination room. An aerial ultrasound method was adopted for the spray. The spores floating in the air were trapped using gelatin filters, and the concentrations of viable spores in the air were measured. The time-lapse remaining rates of viable spores in the air were obtained at different operating conditions of a tested air cleaner, no operation, operation without ion emission, and operation with ion emission. Although the decreasing effect of airborne microbes by the filter of the cleaner was detected, the decreasing effect by the emission of ions at the air cleaner was not detected.
