The FS4BF series of Frigidaire air conditioners offers exceptional two-stage cooling performance. When combined with our engineered coils or air handlers, this unit delivers up to 16-SEER cooling. Ask your contractor for specific ratings for the complete system you're considering.Features and Benefits: R410A Refrigerant: Earth-friendly, non-ozone-depleting refrigerant. Two-Stage Cooling: Provides more consistent temperatures throughout the home and increased dehumidification. Durable: Galvanized steel with a polyester urethane finish. The 950-hour salt spray finish is 1.5 mil thick and resists corrosion 50% better than standard finishes. Quiet: Compressor sound blanket and swept-wing fan blade significantly reduce unwanted noise. Smart: ComfortAlert module detects system and electrical problems and directs the service technician to the root cause of the problem. Green: Because of its energy efficiency and high-end comfort features, this unit qualifies for our ecoLogic green seal. Innovative Micro-Channel Coil: All-aluminum Micro-Channel coil resists corrosion (in select tonnages). ENERGY STAR Rated: Exceeds ENERGY STAR efficiency requirements. Quality Made: Factory checked 144 times before being shipped Copeland Scroll UltraTech Compressor: Proven and simple compressor design for years of reliability; two stages of cooling capacity. Composite Base Pan: Absorbs sound and resists corrosion. Louvered Condenser Guard: Durable metal to protect the unit from yard hazards and extreme weather. Removable Top Grille Assembly: Allows ease of service from the top without disconnecting fan motor leads. High Pressure Switch: Protects against abnormally high system pressures. Auto-reset feature prevents nuisance service visits. Low Pressure Switch: Loss of charge protection ensures long life. Auto-reset feature prevents nuisance service visits. Liquid Line Filter Drier: Included with unit; field installed. One-Piece Top/Orifice: Designed for maximum airflow and quiet operation. Swept-Wing Fan Blade: Designed to significantly reduce noise. Comfort Alert Module: Technical diagnostic feature to assist the servicing technician in troubleshooting system and electrical conditions. Easy Compressor and Controls Access: Designed to make servicing easier for the contractor.Warranty: Exceptional 10-year all-parts warranty Long-lasting peace of mind with 10-year Comfort Quality Pledge to replace the entire unit if the compressor fails Product registration required