Personal comfort is something that no one should have to sacrifice during those sweltering summer months, and with Air King's 9166 whole house window fan, you'll find yourself cool and relaxed no matter what the outside weather might be. Featuring both intake and exhaust functions, stale, recirculated air becomes a thing of the past; the Air King 9166 is specifically designed to move stale air out of your home, and replace it with fresh, outside air, simultaneously keeping you cooler while also helping to maintain a clean, breathable atmosphere. Best to open all of the windows in the house only an inch and turn it to exhaust and on high. Features: Front Mounted Rotary Switch Controls Impact Resistant Plastic Housing Powder Coated Steel Front Grill and Blade 3-Speed Motor with Fully Enclosed, Permanently Lubricated Ball Bearings ETL and OSHA Compliant Includes Innovative Storm Guard® System Assembled in America Window Size Requirements: 27" - 38"W x 26.25"H Product Technologies: Storm Guard® System: Air King's innovative Storm Guard® housing system allows you to shut the window behind your fan during unexpected bouts of bad weather without having to physically remove the fan itself. Whether closing the window to keep the rain out, or securing your home when you leave, Air King's Storm Guard® system offers both convenience and comfort in one package. Specifications: Blade Size: 20" CFM: 2510 - 3560 Window Size Requirement: 27" to 38" Length x 26.25" Height Dimensions: 26-3/4" Length x 11-1/4" Width x 26-1/4" Height Motor: 3-Speed, 1/6 Horsepower, Single Phase Power Cord: 7' Black 3-Conductor SJT Type Weight: 36.6 Lbs. Volts: 120 In the Box: Assembled Window Fan-Includes Storm Guard® Slider Panels Mounting Wood Screws Instructions Sheets Product Variations: 9155: 2470 CFM, 16 Inch Fan Blade Model 9166: This Model Looking for a company that strives to provide superior manufacturing quality, products with exceptional value, and remarkable customer service? Look no further than Air King. After 40 years of undertaking a solemn mission to make your home a healthier, more comfortable place to live, Air King still believes that a house can be so much more than just the place you hang your hat—it can be your sanctuary from the turmoil of the outside world. With the right products, you can begin to build that sanctuary, and Air King is proud to work with you every step of the way.