Propeller Wall and Roof Ventialtors – Northern Fan by Oleg Cthechel Northern Fan Canada Axial Filtered Air Vents are designed for low pressure building ventilation, room ventilation, industrial ventilation, commercial ventilation and industrial process application. Typical applications include heat, smoke, and fume removal; process ventilation and process air handling; proces drying with ambient or preheated air; comfort process cooling and […]