The potential for reactions among indoor pollutants to generate reactive and highly irritating
products is a reason to maintain adequate ventilation rates and clean ventilation filters.
Terpenoid (from recirculated air, a scenario common in the tropics) captured by ventilation
filters can react relatively quickly with ozone which may lead to downstream air supply that
contain oxidized terpenoid and this may be perceived to be less acceptable than outdoor air.
The chemical composition (water solubility and chemical reactivity) of these particles
strongly governs their toxicity. The composition determines either how the respiratory tract
reacts or how the body responds. There are few studies examining the impact of ventilation
rate and ventilation filters on indoor chemistry. Studies documenting the effect of filters,
ventilation and recirculation rate on ozone initiated chemistry in buildings utilizing
recirculation of conditioned air are lacking. Thus the need to stimulate research in this area to better understand the effect, recirculation of conditioned air phenomenon could have on indoor air quality serves as the motive for the quest for tropical research. The paper
demonstrates that reaction between reactive gases to generate highly irritating products may even be more important in mechanical ventilation system that utilizes recirculation of
conditioned air.
To read more on the Effect of Mechanical Ventilation System(s) to Indoor Chemistry Products , please visit: http://www.irbdirekt.de/
Key words –: Filters; ventilation rate; recirculation rate; ozone initiated chemistry; oxidized
terpenoid; secondary organic aerosols (SOAs)
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