The Frigidaire FS4BD, also known as the FS4BD-KA/KB and the FS4BD-KB, is a high-efficiency air conditioner with an efficiency rating of 13 SEER. Because of regional efficiency standard differences, this unit can only be sold in northern climates. All models have all-aluminum, corrosion-resistant micro-channel coils and a permanently lubricated PSC motor which requires no maintenance. The system is protected by a high-pressure switch with auto-reset and a liquid line filter drier, and a swept-wing fan blade helps keep operating noise as low as 74 decibels. The galvanized steel cabinet has a polyurethane finish with 950-hour salt spray approval for protection against corrosion and weather hazards.
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