This German made extraction fan is low wattage with high output and is designed to handle both low air volume hobby use and high air volume commercial use. The RVK fan can be run constantly without any problems. RVK extraction motor is very quiet. If the noise from the airflow is a problem - purchase one of our silencers and place at one end with a carbon filter on the other end. The RVK fan is speed controllable when used with a RAM AIR-PRO Fan Speed Controller and has integral thermal contact with electrical reset. The fan can be installed in any position and is maintenance free and reliable. It is manufactured from fibreglass reinforced plastic. The RVK fan brackets (supplied in a box) allow for easy installation to the floor as well as the wall or ceiling.