Durastar DRTHC122XNA1 12,000 BTU 9.5 CEER Through the Wall System - R32Durastar DRTHC122XNA1 12,000 BTU R32 Through the Wall Heat Cool Air Conditioner The Durastar DRTHC122XNA1 delivers powerful and efficient heating and cooling for rooms between 450 and 550 sq ft. With 12,000 BTU of cooling and 10,600 BTU of electric heat, this 208 230V through the wall unit offers year round comfort in a compact, space saving design. It features a 9. 5 CEER rating, three fan speeds, dehumidification, and a quiet 62 58 dB(A) operation.