Vostermans Ventilation Multifan V-FloFan, 240 VoltVertical circulation for a uniform mix of horizontal air layers Due to their ability to deliver consistent air circulation, vertical ventilation fans are more increasingly used to create a constant airflow at animal and plant level. This fan also mixes the warm air from the ridge of a building with cold lower air, helping you save on heating costs. The Multifan V FloFan has been specifically developed for 'Next Generation Growing (NGG) in the