Experiment research on efficiency of FCU with filter purifying indoor-air-quality in existing ward: Part 4 of the series of research practice of national standard Technical code on clean nursing and i

Researches the indoor purification efficiency of fan coil unit (FCU) with filters in ward by experimental method. Taking two hospitals as examples, randomly selects one experimental ward and one contrast ward in each hospital. The FCU in experimental ward installs the filter and the FCU in contrast ward has no filter. The testing results indicate that in the first hospital, the concentration of fine particle matter (PM2.5) is 63 μg/m3 and the concentration of airborne bacterium is 196 cfu/m3 in experimental ward, while the value in contrast room is 262 μg/m3 and 368 cfu/m3 respectively. In the second hospital, the corresponding values are 45 μg/m3 and 272 cfu/m3 in experimental ward and 105 μg/m3 and 479 cfu/m3 in contrast ward. Demonstrates that FCU with filter can efficiently decrease the concentration of PM2.5 and airborne bacterium in the ward.