Electric Infrared Heater Overall Length 33 in Overall Width 21 1/2 in Overall Depth 11 in Phase 1 or 3 Voltage 480V AC Wattage Output 7500W Beam Pattern 30 Degrees Element Type Quartz Lamp Housing Color Silver Housing Material Aluminum Mounting Type Recessed Surface Suspended Grille Depth 1/8 in Grille Height 25 1/2 in Grille Width 18 3/4 in Grille Material Stainless Steel Heating Capacity 25 298 BtuH Heating Method Radiant Housing Finish Nickel-Gray