興趣愛好Wind causes a positive pressure on the windward side and a negative pressure on the leeward side of buildings. To equalize pressure, fresh air will enter any windward opening and be exhausted from any leeward opening. In summer, wind is used to supply as much fresh air as possible while in winter, ventilation is normally reduced to levels sufficient to remove excess moisture and pollutants. An expression for the volume of airflow induced by wind is: This system consists of two fans placed next to one other, one of which draws in new air while the other exhausts stale air. Due to the proximity of the two, there is an air-to-air exchange that preconditions the new air entering the house, making use of something called a heat exchanger. For houses in colder climates, this is a good option. ---BEGIN REPORT---
