We have investigated the effect of UVC on IAQ in a ventilation plant in a typical office building. The UVC-system consisted of UVC-lights for irradiation on all central components in the air handling unit. A similar ventilation plant, but without UVC, was chosen as a reference plant. Microorganisms on surfaces, living airborne mould spores and MVOC (Microbial Volatile Organic Compounds) were sampled throughout the ventilation plant and in corresponding rooms before and after UVC-irradiation. In addition, parallel measurements in the reference plant were conducted. The number of colony forming units on surfaces were reduced in the "UVC-plant" after irradiation. For living airborne mould spores and MVOCs, no significant difference was observed. Conclusive UVC-systems seems in general to have little effect on IAQ in buildings with normal comfort ventilation plants.
Installation of a ultraviolet irradiation system, type C, plant and its influence on indoor air quality
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Year:
2003
Bibliographic info:
The 4th international conference on Cold Climat HVAC, Trondheim, Norway, June 16-18, 2003,
Paper 39, pp 1-10, 6 Fig., 2 Tab., 14 Ref.