He next decides the material to be used, in the desert the homes are often made from materials that surround them . Fore example sand and concrete are used to make the foundation and blocks for the structures. The most common way to cool and to heat the house is called tower. It is used by day as a cool tower . At the same time a tray of water is placed.
Air passes through the pads with little resistance and is cooled by the evaporation of water.
Since the moist damp air is heavier than the warm dry air it sinks and cools the structure. Another way is to use Evaporation cooling. Blowers are used to blow warm air through wet pads as the water evaporates the air is cooled, but soon the water stops evaporating and the air becomes warm. So you must open a window to let out the warm air. The building are also constructed in a way that small opening are placed the facade of the building faces the wind so that it is ventilated.