An Analysis of the Use of Multi-Stage Filtration Systems in Ventilation and Air-Conditioning Installations

Abstract

An important factor which reduces the quality of air supplied to a room by an air-conditioning plant is inadequate cleaning of the installation. This fault may exist in tandem with others built in during the design process (e.g. improperly placed filters with too low filtration efficiency). When, in addition to any design errors, the whole system is also badly maintained and the net work of ducts and conditioning devices are not cleaned this can result in an increase in the pollution of the air supplied to the room. For proper operation of air-conditioning it is necessary to comply with the guidelines concerning cleanliness of ventilation systems. Also, it seems reasonable to include the addition of a multi-stage filtration system, which will decrease the concentra tion of contaminants in air supplied to a room. This article describes a model of the effect of adding a four-stage filtration system to an air-conditioning system.