6. Discussion
The proposed design has some constraints. The frst costs may be high because of the elevated frst foor. Hf the frst foor is built on-slab, the ventilation rate would be reduced. This problem can be remedied by using a ceiling fan or solar chimney. The large aperture necessary for natural ventilation has some negative features, such as allowing outdoor air pollutants, outdoor noise, and insects to enter the house, reducing privacy, and creating potential security problems. However, in suburban areas, the air is much cleaner and there is less traffc noise. Mosquito nets and privacy and security screens could solve the other problems. Although the screens reduce the velocity of the wind, the wind speed is still high enough to shift the indoor condition into the comfort zone. Such screens are available on the market, but are beyond the scope of this research.