Welded tubular steel frame is mounted to cabinet with spring isolators. All cabinets are acoustically lined with a fiberglass insulation manufactured by an approved vendor.
Insulation is secured with a non flammable contact cement.
All exposed edges and joints in insulation are sealed to eliminate shedding. Forward curved centrifugal type. Bearings are sealed ball type, isolated in rubber. Shaft material is ground and polished stress-relieved steel, with flats and keyways to prevent slippage of driven pulley. Motor is mounted on an adjustable base.