Comfort™ Fan Coil FB4C Efficiency Support with Comfort and Budget in Mind The Comfort™ FB4C fan coil utilizes a high-efficiency, multi-speed blower motor to provide comfort options. Paired correctly with an outdoor air conditioner or heat pump, it can aid efficiency to help you save on your energy dollars. Standard Features ArmorCoat™ coil protection for enhanced corrosion resistance High-efficiency, 5-speed blower motor Improved humidity control Multi-flow piston metering device (TXV in 5 ton size only) Sloped, corrosion-free drain pan design helps reduce mold and bacteria build-up Non-ozone depleting Puron® refrigerant Fully insulated cabinet 10-year parts limited warranty1 Optional Features Can be purchased with a factory-installed or optional, field-installed, electrical-resistance heating package Optional labor warranty available2 1 To the original owner, when product is used in an owner-occupied residence, a 10-year parts limited warranty upon timely registration of your new equipment. Warranty period is 5 years if not registered within 90 days. Jurisdictions where warranty benefits cannot be conditioned on registration will automatically receive a 10-year parts limited warranty. See warranty certificate for complete details. 2 Ask your Carrier® dealer for details.