To reduce heat buildup inside the attic by natural ventilation, in which ventilation testing air ventilation by using air from outside (External ventilation), as shown in Figure 3.2.
In order to reduce heat buildup in the attic with natural ventilation. The test ventilation is ventilation using outside air (External ventilation), as shown in Figure 3.2.
To reduce the heat accumulated inside the attic by natural ventilation. The test is a ventilation ventilation by air from the outside (External ventilation) as shown in the hole at 3.2.