LASKO 2137 7 Twin Window Fan Type: Window Fan Speed Setting: 2 Quiet, Energy-Efficient Speeds Weight: 8 Feature: Can Be Positioned for Intake or Exhaust Slim Profile to Maintain Outside View Fits Most Windows: Double-Hung, Casement, Sliding . . . Expander Panels for a Custom Fit (Fits Windows from 22 to 34 wide) Two Quiet, Energy-Efficient Speeds Fully Assembled for Window Use (Snap-On Feet Included for Floor or Table Use) The versatile 7 Twin Window Fan cools both day and night! Set on exhaust during the day, the fan creates a refreshing indoor breeze that expels accumulating heat. Set on intake at night, it draws in the cool evening air. Fits most double-hung, casement, and sliding windows. Labor: 3 years limited Parts: 3 years limited