HOLMES Dual Blade Twin Window Fan, 2 Speed Setting, White

Maintain a comfortable temperature indoors with the Holmes Twin Window Fan. Designed to fit most double-hung and slider windows, this double window fan takes in fresh, cool air from the outdoors to provide cooling comfort. It can also be manually reversed to exhaust stale, hot air from the indoors. Featuring two speed settings and a thermostat, the fan allows you to adjust airflow in accordance with your personal comfort level. Water-resistant motors make the fan safe for use during rainy weather. And thanks to its adjustable extender screen and extender panel, the fan can fit securely in a wide range of window sizes.