Benchvent glue spray air filtration units benchvent bv200s this air filtration unit is capable of filtering 650msup3hr of air and is designed to be an occasional spray trap for studioworkshop cleanliness and operator protection from concentrations of airborne contaminants the spray booth has two filters a particulate intake filter and a carbon impregnated fibre filter the particulate filter is a 3 stage graduated fibre filter with a high dust holding capacity the carbon filter