• Cabinet fabricated from extruded aluminium angle sections (UNI 9006) and zinc-coated sheet metal panels, insulated with polyethylene sound absorbent padding, surface finish self-adhesive metal foil, Class I. • 2 speed three-phase AC motor, coupled by way of belt and pulley drive to a forward-bladed double inlet centrifugal impeller. • Maximum air flow: 22,000 m3/h.