KING'S KB SERIES UNIT HEATERS ARE DESIGNED FOR USE AS PRIMARY OR SUPPLEMENTAL HEAT SOURCES IN LARGE OR EXPOSED AREAS INCLUDING HIGH-RISE BUILDINGS STORES WAREHOUSES GARAGES WATER TREATMENT AND FIRE ROOM VAULTS TO PREVENT FREEZING. SPIRAL FINNED STEEL ELEMENTS AND HIGH CFM ENSURE EVEN AIR DISTRIBUTION PRODUCING COOLER ELEMENT OPERATION PROLONGING HEATER LIFE. BY COMBINING THE HIGHEST QUALITY COMPONENTS WITH A DYNAMICALLY BALANCED FAN BLADE AND IN-BUILT THERMOSTAT THE KB UNIT HEATER WILL PROVIDE YEARS OF TROUBLE-FREE SERVICE. INCLUDES UNIVERSAL WALL/CEILING BRACKET FOR SIMPLE INSTALLATION. ADJUSTABLE LOUVERS TO DIRECT AIR BUILT-IN FAN DELAY TO DISSIPATE HEAT BUILT-IN SINGLE POLE THERMOSTAT HIGH MASS STEEL FIN HEAT EXCHANGER PATENTED THERMAL OVERLOAD SMART LIMIT PROTECTION® PERMANENT LUBRICATED UNIT BEARING MOTOR UNIVERSAL WALL/CEILING BRACKET INCLUDED PROUDLY MADE IN THE USA WITH U.S. & GLOBAL MATERIALS 20 GAUGE ELECTRO GALVANIZED STEEL CONSTRUCTION WITH A RUST INHIBITING BAKED ENAMEL FINISH HEAVY GAUGE STEEL REAR INTAKE SCREEN SPIRAL FIN METAL SHEATH ELEMENTS ALUMINUM AXIAL FAN BLADE 5 YEAR LIMITED WARRANTY BR