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Portable negative air ion generator has been designed and tested. This device generates continuous emission of unipolar (negative) ions and it was evaluated by investigating its ability to remove respirable particles such as different smoke verities (mosquito coil smoke, cigarette smoke, petrol smoke) from indoor air environment. The experiment was carried out in closed glass container, decay rate for particle concentration were obtained in presence and in absence of negative air ions. The particle removal efficiency was obtained and it can be observed that removal efficiency was highest for petrol smoke as compared to cigarette/mosquito coil smoke. The experiment confirms removal of about 95% respirable particles from indoor air in addition to the natural decay effect.

Control of Respirable Particles in Indoor Air with Portable Negative Air Ion Generator