Several theoretical studies were oriented towards the relationship between the main two building design estimators (building energy
consumption and indoor environmental quality) but very little experimental research has been carried out in order to underline the
correlation between this two parameters. This paper is focused towards the experimental study of the correlation between these two
design estimators. Several indoor comfort parameters (air temperature, radiant mean temperature, sound pressure level, outdoor
ventilation rate and lighting level) as well as energy consumption were monitored in different rooms inside a laboratory experimental
house at real scale located in Bucharest, Romania. Time variations of these parameters and space distribution maps inside the house
were analysed in order to understand the indoor comfort variations. Four comfort indexes (thermal comfort index, acoustic comfort
index, indoor air quality index and visual comfort index) were determined and their time variations were used to emphasize the
correlation between the indoor environment quality and the energy consumption. The overall indoor environment quality was found
to be inversely correlated with the energy consumption and that this general trend can be easily influenced by the weight of the four
comfort types.