Evapco AT-Series Cooling Tower- 490 Ton. Model AT12-618B. S/N 95-8580W. Capacity 1,050 gpm @ 87°F in, 77 °F out, 73 °F WB. Make-up water pressure 20 psi min, 50 psi max. Fan Motor, 30 hp, 460/3/60. The AT is an induced draft, counterflow design cooling tower. Features include: efficient drift eliminators and superior inlet louver and screen design. Its optimum design can withstand freezing climates. The unit is also designed for easy disassembly of drive components. Dimensions: 16 ft. 4-3/8 L x 10 ft. 11 in. W x 10 ft. H.