Abstract: A solar ventilator (1) is fittable to an edge (2) having first and second sides corresponding to first and second regions. The edge can be of a barrier, e.g. of a movable window of a motor vehicle or of a building. The ventilator has a suspension (5) for suspending the ventilator from the edge so that the ventilator will be adjacent the first region. The ventilator has a housing (4) having inlet and outlet portions (11,12) for enabling air to be transferred therebetween from a region to the other region. A fan (13) is comprised by the housing so as to enable the transfer of air. A solar generator (15) drives the fan. The ventilator may be arranged for direct or indirect reception of solar radiation.