Finding F-1604

“In the air-conditioned buses, after 6 min of operation of the system, slightly more fungi remained in the inside air than in buses without air-conditioning system, and after 1 week of use of the system, fungal microflora pollution was 24.2 and 22.2% of the concentration before system starting, while after 22 weeks the corresponding percentages were 32.2 and 30.4%, respectively.”

Sowiak Does the air condition system in busses spread allergic fungi into driver space? (2018). Environmental science and pollution research international. Page 4. CKB 7319

Structure

Factor: Airborne fungi
Intervention: Ventilation
Setting: bus cabin
Study design: measurement study of bus cabins: airborne fungal microflora measured before and after starting the air-conditioning or the ventilation system, in buses with and without air conditioning, after one week and after twenty-two weeks of use (class 4)
Effect: other 24.2
Caveat: the study says the differences between the two kinds of bus were not statistically significant, and that after 6 min of operation slightly more fungi remained in the air-conditioned buses

A Finding records what one published document states, verbatim and with its page. It is not a conclusion of Coridum; see the Claims that build on it.