Placing a enthusiast by an open window to blow inside air out encourages airflow all through the area. Open windows on transportation vehicles (vehicles, vans, and many others.) when safe and sound to do so. Screened home windows really should be opened every time weather conditions and the outside air top quality permits (1). When home windows are not in a position to be opened, rooms ought to be ventilated, as specified in Standards 5.2.1.1-5.