Product details:

The Bionaire Twin Window Fan is designed for maximum convenience and comfort. This unit is intended to fit double-hung, slider and casement windows, and the fan's two high performance 9 blades are engineered to draw in fresh cool air, exhaust stale indoor air, or exchange for full room circulation. Dimensions: 4.25 D x 24.25' W x 13' H Fan will fit window openings within: Width – 24.25'-34' Depth – 4.25' Height – 12.0' (minimum height) Weight: 8.8 lbs.