The most cost effective solution to air movement and cooling. The RVK range of inline fans are quiet running and have a low noise level. They can be used as extractors or intake fans and can be coupled to carbon filters and air-cooled lights. All units are plastic cased although metal cased fans are available upon request. To help you decide what fan you need simply work out your room volume in metres (lenght x width x hight), then multiply your room volume by 20, this will give you a starting point of a complete air change in the room every 3 minutes. You may want to double this for hot rooms and during summer months.