FE4 Performance Warranty 5-year limited parts Cooliing Capacity 18.000 - 60,000 Controls Controls Supported Infinity Control Technology Refrigerant Puron® Refrigerant Features Thermostatic Expansion Valve Filter Washable filter Blower High efficiency, variable speed Installation Multipoise Aesthetics Construction 20-galvanized steel Paint Baked on urethane base coat and polyester top coat  FE5 Performance Warranty 5-year limited parts Cooling Capacity 18,000 - 60,000 Controls Controls Supported Infinity Control Technology Refrigerant Puron Refrigerant Features Thermostatic Expansion Valve Filter Washable filter Blower High efficiency, variable speed Installation Multipoise Aesthetics Construction 20-galvanized steel Paint Baked on urethane base coat and polyester top coat