Product Type Suspended Vertical Hydronic Wall & Ceiling Unit Heater, Air Flow Direction Vertical, Heating Method Steam, Water, Output @ 2 PSI Steam 65,500 BtuH, Output @ 200 F Water 39,600 BtuH, Air Flow 989 cfm, Fan Phase 1, Overall Height 11 1/8 in, Overall Width 21 1/4 in, Overall Depth 21 1/4 in, Amperage 2.1 A, Coil Type Rectangular, Connection Size 1 1/2 in, Connection Type Threaded Male NPT, Fan Diameter 13 1/2 in, Fan Guard Type No Guard, Flow Rate 4.08 gpm, Frequency 60 Hz