Lasko 2155A 16&Prime; Electrically Reversible Window Fan - Features Storm Guard and 3 Intake and 3 Exhaust Speeds 3 Intake and 3 Exhaust Speeds - makes this fan ideal for bringing cool air into your home or exhausting hot air out of your home. With 3 powerful speeds for each direction, this fan is ideal for cooling a room or your entire home. Expandable Side Panels - enables this fan to fit many window sizes. The panels on each side expand allowing you to install the fan on windows from 26.5" to 34.5" wide and 22" high and larger. High Performance Air Movement - means this fan will move air through your whole house. Install the fan in a kitchen, bedroom, living room, or home office window and enjoy a quiet breeze. Fully Assembled - allows you to take the fan out of the box and install in your window frame in minutes. Just install the fan in the window with the included hardware and power up.