Performance Series Variable Speed Fan Coil Models: FK4 Ratings Energy Efficiency Warmth   Key Features Puron® Refrigerant or R-22 Refrigerant Improve system efficiency by 2 SEER ComfortHeat® Pump System up to 20 degrees added warmth Variable speed fan Improved humidity control Enhanced indoor air quality Thermostatic Expansion Valves Optional electrical resistance heat Five-year limited warranty Click here to read more. Comfort Series Deluxe Fan Coil Models: FC4 Ratings Energy Efficiency Warmth   Key Features Puron® refrigerant Improve system efficiency by 2 SEER Washable filter Three-speed blower motor Improved humidity control Enhanced indoor air quality Thermostatic Expansion Valve Optional electrical resistance heater Five-year limited warranty Click here to read more. FA4 Standard efficiency Designed for Freon 22® refrigerant Enhanced Indoor Air Quality Multipoise for installation flexibility Read more about FA4

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