Air extraction spray booths benchvent bv100h d the benchvent graphic air filtration system flexi ducted bv100h d is an air extraction unit that is ideally suited to use as spray booths for a wide variety of applications in the studio classroom or workshop a 710msup3hr air volume capacity caters for many applications and all odours and gases exrtacted are vented to atmosphere via two flexi ducts so that the working environment can be kept free of contaminants the design of the unit mea