When properly matched and installed, your DX13SA Air Conditioner offers up to 14 .5 SEER energy-efficient performance. The higher the SEER, the greater the efficiency — and the lower the operating cost compared to lower SEER units. In many applications, the efficiency of your DX13SA can be enhanced by using it in conjunction with a Daikin brand gas furnace. This unit features a powder-paint finish over heavy-gauge galvanized steel that provides premium durability and excellent UV protection.