Indoor Air Quality Index.

Under-estimating the ventilation flow rate results in increased sanitary risks and damage to the existing building structure. Over-estimating ventilation flow leads to energy waste. In this context, a number of approaches have been designed to determine indoor air quality indicators. The aim of these is to compare comfort and sanitary quality in different atmospheres. This document presents four air quality indicators developed by three French teams and one Danish team.We examine the strengths and weaknesses of each design, plus their specific areas of use. Lastly we examine the problems common to each approach.