Lasko 2138 Electrically Reversible Twin Window Fan, 8 in Dia Blade, 545 cfm, 120 V, White

Lasko's versatile 8 in electrically reversible twin window fan features expanding side panels for a safe, custom fit. Two quiet speeds make it ideal for night time use. A Comfort Watch thermostat automatically senses room temperature and turns the fan On or Off. Lightweight with a convenient carry handle, it fits most windows and comes with snap on feet for floor or table use.