Lasko(r) Twin Nine Window Fan (2136)

8" twin window fan with thermostat "E-Z Click" expander panels to fit windows 22" to 34" wide and at least 10" high Ideal for nighttime use Manually reversible for air intake or exhaust on two quiet speeds Thermostat senses room temperature and turns fan on or off automatically to maintain comfort level No assembly required U.L. listed White