Friedrich UE10D33C 10000 BTU Uni-Fit Series Room Air Conditioner with Electric Heat, 230-volt Uni-Fit thru-the-wall room ac w/electric heat; 9.8 EER; installs through walls up to 16 1/4" deep; conditions rooms up to approx. 450 sq. Ft Universal fit for easy replacement in existing 24" 1/2 to 27" wall sleeves 24-Hour timer lets you program on & off times Includes universal fit trim ring to cover up to 1" gap on sides and 1/2" gap on top depending on existing sleeve size Money saver saves money by operating the fan only when cooling