\Internal courtyard houses
Sardab:
Sardab (literally cool water ) is an underground place, where the water
of Qanat passes. It is about 6 meters below the floor level. Flowing with cold
water. It has very cold, and wet air compared to the ambient air. To use
this cool and fresh air, there is a duct coming down from the wind catcher
leading breezes right to this space. Another duct then leads
this cool air to a big underground hall, that is naturally cooler than
ground floor spaces, and provides fresh air for this room. Passing
this room the cool air will flow to central courtyard and freshen its
air.
Under ground tunnels:
There are underground tunnels in four sides of the court yard, that prevent damp of flower beds, and pool spoiling the main structure, which is built with mud-brick, and be damaged by wet. These tunnels give humidity to the air and the air will pass out through vents. This is another aid to cooling the system.
