SCB048ALCF0C0PS TRANQUILITY 18 (SC) COMPACT SINGLE STAGE SERIES R-454B REFRIGERANT LEFT RETURN, BACK SUPPLY AIR,460/3, 4 TON CXM2 CONTROLS, STANDARD RANGE ULTRA-QUIET CABINET WITH 2 FILTER RAIL, UNCOATED AIR COIL, STANDARD DRAIN PAN, PSC MOTOR, COPPER HEAT EXCHANGER CLIMATEMASTER