The 2137 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.
- Fits most windows from 22" to 34" wide
- Two Speeds; Can be positioned for either intake or exhaust
- Snap-on Feet for Table of Floor Use Option
- Fully Assembled
- ETL listed, patented, fused safety plug