ENERGY STAR® qualified 11500 Btu commercial grade WallMaster thru-the-wall room air conditioner has an EER of 9.4 and installs through walls up to 15 5/16" deep to condition rooms up to approximately 550 sq ft. * Fits Fedders A and Fedders B sleeves with baffle adapter kit * 24-hour timer lets you program on & off times * Smart Fan auto adjusts fan speed to maintain desired temperature * Money Saver®saves money by operating the fan only when cooling * 24-hour timer lets you program on and off times * ENERGY STAR qualified 11500 Btu commercial grade Wall Master thru-the-wall room air conditioner has an EER of 9.4 and installs through walls up to 15 5/16" deep to condition rooms up to approximately 550 sq ft * Fits Feeders A and Feeders B sleeves with baffle adapter kit * Money Saver saves money by operating the fan only when cooling