1997 Evapco 3-Fan Evaporator. Model: TFC3-8184-150P. Refrigerant: R-717 (Ammonia). Nominal capacity: 42.1 tons or 505,200 btuh. Fins per inch: 5. Coil rows: 8. Tube diameter: 1 in. Design pressure: 250 psi. Tube and fin material of construction: galvanized steel. Number of fans: 3. Fan diameter: 3 ft. 6 in. (3) Toshiba high efficiency motors, 1.5 hp, 1160 rpm, 230/460V, Unit has a hot gas defrost coil only and is designed for a 35ºF room temperature. Inlet: (1) 4 in. dia. port, (1) 1.5 in. dia. port. Outlets: (1) 1 ½ in. dia. port, (1) 1 ½ in. dia. port (drain). Overall dimensions: 18 ft. 2-5/8 in. L x 4 ft. 5 in. W x 6 ft. 3 in. H.(ACN262)(H15).