Holmes, White 7 Twin Window Fan

Fits double-hung, slider, and casement windows. Extender panels included for a safe, custom fit.     Holmes HAWF2021 Dual Blade Twin Window Fan   This Holmes Dual Blade Twin Window Fan provides relief from hot weather. Draws in cool air from the outdoors or exhausts the stale indoor air. Designed to fit virtually all slider and double hung windows. Quiet and efficient operation makes this idea for living room or bedroom use. Versatile design allows for use on a desk or table as well as the option of being mounted to a wall. The fan's extender panels allow for a safe, custom fit. The manually reversible feature lets you control your airflow for intake or exhaust.                       2 Speed Settings   Set and control your fan speed for optimal air flow and comfort                 Adjustable Screen   Screen expands to fit larger windows and slider safe extender panels offer rigid support for vertical orientation.                   Reversible Air Flow   Manually reverse your fan for intake or exhaust