Investigation of air quality and ventilation hygiene, Kloten
Hygienic and health inspection of the ventilation systems at the Schluefweg Center
The project
Location: Kloten (ZH)
Client: City of Kloten
Phases: Hygienic and health assessment of the ventilation systems from the time of construction (1977)
Duration: 2020
The Schluefweg Center in Kloten has an extensive network of ventilation systems dating from the time it was built, which will be replaced in stages over the next few years. To ensure that the ventilation system in its current state does not pose a health risk to building users, Ecosens AG examined the quality of the air from the ventilation system. To this end, this supply air was checked in various rooms for any microbial contamination, fine dust and the presence of artificial mineral fibers and these measured values were compared with the hygiene requirements of the applicable standards and guidelines. According to the hygiene requirements for ventilation systems and devices, the quality of the supply air must not be worse than the corresponding reference air (in this case the outside air). The measurements carried out showed that the quality of the air from the ventilation system is flawless from a hygienic point of view and that any risk to building users can therefore be ruled out.
Examination of the supply air in various rooms for airborne germs, bacteria and fine dust, including a reference measurement at the respective outside air intake.
Implementation and evaluation in accordance with the current guidelines SWKI VA 104-01 (VDI 6022 Sheet 1).
Visual inspection of the ventilation system network.
Measurement of the concentration of man-made mineral fibers (KMF) in selected rooms (measurement according to VDI 3492).
Definition of measures to ensure perfect indoor air quality until the ventilation system is completely replaced.
Challenges
Representative sampling of premises in an extensive plant network.
Prevention of false air admixture through the room air with different and sometimes difficult to access air outlets.
Risk assessment for users and definition of short and medium-term measures.
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