To bring different temperature-differences at various places in a building to the average.

A heat resistant pipe 2 is buried in the earth 1 being under a floor of a whole building, and a temperature adjusted fluid is allowed to pass through the inside of the heat resistant pipe 2 whereby heat is stored in the earth 1 and is dissipated from the same, and is further circulated together with a rising air stream produced in a ventlating layer in the building. Thus, adjusted temperature is dissipated and circulated from the underground pipe to the ventilating layer located between an outer wall and an inner wall of the building whereby temperature differences at various places are reduced as far as possible.