Keep cool no matter the circumstance, and invest in a reliable cooling source like the LG 24,000 BTU Energy Star Window AC (LW2513ER). This top-of-the-line window AC boasts a comfortable 24,000/24,500 BTUs and features 4-way air deflection, 24 Hr, On/Off timer. Looking for some real cooling power, How about 24,000/24,500 BTUs with a 9.4 Energy Efficiency Ratio. This is our most powerful window unit yet, and can take on up to 1560 square feet with three cooling and fan speeds. Plus, with Auto Restart, if the power goes out, your unit automatically turns on after it is restored.