Pneumatic low profile series fan powered terminal The FLS is a Low Profile Series Fan Powered Terminal designed for small ceiling plenum applications. At a height of 10 1/2 inches, they are especially useful where building height limits dictate shallow ceiling plenums. FEATURES AND BENEFITS Useful where building height limits dictate shallow ceiling plenums Energy efficient fan motor, permanent split capacitor type, mounted in vibration isolators Adjustable fan speed control Inlet sizes: 8” dia., and 16” x 8” / Unit sizes: 2, 3, 4