2004 Indeeco Electric Duct Heater. Type: TFXU. 50.6 KW. DWG No. L931N1: C21607-A-0. P.O. No. RJ04-380. Tag No. RHC-9403.4. Control Panel. Catalog No. 103-A3-480-40I. S/N: 2E04 79692. Panel power supply: 480 V, 40 amps, 3 phase. (6) Tubular finned coils. No. of steps: 1. Coil dimensions: 1 in. dia. x 3 ft. 11 in. L. Heater power supply: 65 hp, 480 V, 60 Hz, 3 phase. This is a slip in unit. Inlets/outlets: 4 ft. 2 in. L x 1 ft. 8 in. W. (duct). Indeeco duct heaters utilize the finest of construction principle and techniques. The coil is constructed of a .475 in diameter stainless steel sheath and contains a 80% nickel, 20% chromium resistance wire insulated from the sheath by a magnesium oxide powder, compacted to rock-like density. The elements are flanged, making them individually removable. All heaters are suitable for installation in ducts with up to one inch of interior lining. Overall dimensions: 2 ft. 10 in. L x 2 ft. 10 in. W x 4 ft. 6 in. H. (ACN31a)