Beat the summer heat with the help of the Holmes window fan with AccuTemp Plus digital thermostat. It offers 3 different fan speeds for better air circulation. With the built-in adjustable extension panel and window extenders, it can easily fit into any size window. This 3-speed window fan provides quiet operation and doesn"t cause any disturbance. With a reversible air flow option, it also doubles as an exhaust fan. It also has a grill guard for safe operation. This window fan with digital thermostat is easy to assemble and doesn"t require any tools.