A filter fan unit or FFU or FVE (filter fan unit) is a module consisting of a fan and a filter that draws in air from above and blows it into the room through the filter. The aim is to permanently filter the recirculated air.
A filter fan unit or FFU or FVE (filter fan unit) is a module consisting of a fan and a filter that draws in air from above and blows it into the room through the filter. The aim is to permanently filter the recirculated air.