• Powder coated 18 Gauge steel front. • Automatic reset thermal limit. • Steel block fin element. • Weight 22 lbs. • Vane axial fan blade: 600 RPM / 175 CFM. • Rough in dimensions: 14-3/16” Wide x 19-15/16” High x 4” Deep. • Grill dimensions: 15-3/8” Wide x 20-9/64” High. • Units with dual wattage, factory wired to highest wattage.• Wattage selectable at time of installation on some models.