Carrier 52 FC 1 08 3 E Type TTW Controls FC=Cool Only FE=Heat/Cool Model Series Voltage 1=115 3=230 Series Number BTU 06=6,000 Btu 08=8,000 Btu 12=12,000 Btu 18=18,000 Btu LG L T 24 00 H R LG Air Conditioner Remote Control Series TTW Electric Heat BTU 8=8,000 Btu 10=10,000 Btu 14=14,000 Btu 24=24,000 Btu Model Series Haier ESA3 12 5 Series ESA3= Energy Star HWR=Electronic Control HWF=Mechanical Control HTWR=TTW with Remote BTU 06=6,000 Btu 08=8,000 Btu 10=10,000 Btu 12=12,000 Btu Style