LG LW2416HR 23000 BTU 230V Air Conditioner with Heat Window-Mounted Air Conditioner Energy efficiency Ratio (EER): 9.8 (cooling) Special 230V electrical outlet required (Unit will not work with a standard 115V outlet) Supplemental heat capability provides an additional heat source to your main heat source when outdoor temperatures are above 45 Degree 22,500/23,000 BTU cooling for rooms up to 1420 sq. Ft 9,400/11,600 BTU supplemental heating for approx. 500 sq. Ft