The purpose of this study is to quantify the indoor air quality of multi-family houses and to obtain the basic data for the estimation of air quality by using the volatilizing rate of each part of the finishing material. This research aims to analyze temperature and heat distribution characteristics of supplied air in an under floor air conditioning system, and to develop a method for evaluating such processes. In this paper, we 1) present a method for calculating the temperature of supplied air within the raised floor; 2) describe a large-scale experiment that we performed, and by comparing the results of this experiment with those of calculations, demonstrate the usefulness of the above temperature calculation method; and 3) propose a simple evaluation method by clarifying the relationship between parameters like the thermal characteristics of the material used to construct the raised floor, amount of supplied air, etc., and the temperature distribution of supplied air and distribution of heat supplied inside the room.
