Thailand is tropical, the average daytime temperature is between 30-40 degrees Celsius. In addition, the building is exposed to the sun almost all day, causing heat to enter the building, whether roofs or walls, especially the heat that accumulates under the roof and radiates heat that gets into the building.

To reduce heat there are many ways such as use insulation, plant trees, install canopy or use light roof shade. But need to have air ventilation to make comfortable, keep cool inside.

Natural ventilation (Passive Ventilation) will rely on passive airflow ventilation by natural convective circulation, that is, “hot air will rise higher and the cooling air will flow in instead”, thus reducing the heat. without using electric power.