Housing constructed of heavy gauge aluminum • Centrifugal backward inclined, non-overloading wheel fabricated from aluminum • Weatherproof safety disconnect switch • Grease spout welded to housing • Vibration isolators • Adjustable pitch drive assemblies • Adjustable motor mount • Ball bearing motors • Forces fresh air through motor to ensure long motor life • Corrosion resistant fasteners • High heat operation (300 °F) • Rated for restaurant and general ventilation applications • Grease classification tested • UL705, and ULC-S645 •