... , light weight 3,with CE certificate Portable ventilator(portable blower,air blower,exhaust fan) Size:8" 10"12" 14"16 ... maintainance,shipping making,exhaust for fire fighting, piping construction and in other violent working situation for ventilator. with good insulation ... , high pressure and large air volume character. Portable ventilator connect with flexible duct,with easy to carry characteristics, ...