Armstrong Air® 4SCU13LE148P Louvered Enhanced Split System Air Conditioner, 4 ton Cooling, 208/230 VAC, 31.9 A, 1 ph, 60 Hz, 13 SEER. Product Features. The 4SCU13LE uses MHT™ Technology to increase the efficiency of heat transfer between metal and air. For added dependability, it also uses a high-pressure switch that protects crucial