Ventamatic 18 In. Automatic Metal Shutter for Gable Mount Power Attic Ventilators XXMPNOZZLE power cord ensures you can Color:Brown power cord ensures you can reach an outlet and the foot pedal locking feature on the wheels keeps your fan safetly in place once you choose the perfect location This fresh air fan has an energy saving mode for further customization and can accept a 10" x 10" x 2" air filter for even better incoming air quality Each aluminum louver is individually padded with felt for an extremely quiet operation No special tools are required for installation and the frame has pre punched holes to secure it in your attic space with zero hassle