Open your windows and let the air in with this 20 in. box fan from Perfect Aire. The weather-resistant motor housing means you can place this fan in your windows for air circulation with no worries. The 20 in. diameter fan blades provide powerful air flow and quiet operation on three fan speeds. Built for convenience, this box fan features an easy carry handle, recessed cord storage, and a removeable front grill for easy cleaning. Now that's a breath of fresh air.