Cooling on physical principles
Warm air is rising up. It heats the water in the pipe of the brick-air-handling ceiling. With the conduct of the warm water the heat would be transported out of the room. So the air gives the energy continued off to the cold water. The room cool slowly without air movement down. The temperature of the compartment air could be reduce up to 6°C.
Also here comprise the environmental features of the building material clay brick:
The natural regulation of the ambient air humidity.
Brick regulate natural air humidity
By the cooling of the air a lot of humidity is developed, which can not be affiliated by the compartment air.
For a acceptable atmospheric environment the dynamic of the capillary take care. Due to the relative low residual moisture the clay can absorb a lot of humidity and give it quickly off by open the windows. So it balancing the air humidity of the room.