W18HF-A04XXXXXX 1 1/2 TON WALL MOUNT HEAT PUMP CONFIGURED AS FOLLOWS: F - R-454B RIGHT SIDE CONTROL A - 208-230/1/60 VOLTAGE 04 - 4KW ELECTRIC HEAT X - BAROMETRIC FRESH AIR DAMPER X - 1" FIBERGLASS MERV-2 FILTER X - BEIGE BAKED ENAMEL FINISH X - STANDARD CABINET X - COPPER/ALUM COILS X - HIGH & LOW PRESSURE SWITCHES COMPRESSOR CONTROL MODULE, REFRIGERANT LEAK DETECTOR (RDS) MFG BY: BARD