The aim of this study is to present different possibilities of use off
ered by an air-earth exchanger. With the help of real site experimenta
tion from which a simplified simulation model has been validated, the
efficiency of this system when it is coupled with an individual house
is demonstrated. It is shown that this system can be used to save 10%
of house energy consumption by preheating fresh air in winter, to avoi
d freeze risks in a dwelling during winter, to refresh air and to impr
ove comfort conditions in summer. For this case, it keeps house ambien
t temperature under a value of 27 degrees C without using a convention
al air-conditioning system. Finally, actual limits of the study which
has only been carried out for the specific case of house and air-earth
exchanger are given.