Get relief from hot weather and stale air using the Bonaire Thin Window Fan with Digital Thermostat. Designed to fit windows with minimum openings of 25.5 in x 8 inches (65cm by 20 cm). This window unit uses three independently controlled fans to circulate air and provide efficient cooling. This window circulator fan comes equipped a digital thermostat to provide easy, precise control over airflow, and it features three speed settings for personalized comfort. Dual locking extender screens hold the fan rigidly in place, helping ensure a secure fit. 3 Speed Settings. LED Control Panel. Electronic Thermostat & Manually Reversible Airflow. NEW “Firm Fit” locking extender screen. Designed for Use Either Horizontally or Vertically. It is more powerful with 40% greater air velocity compared to similar window fans and 25% more compact to reduce window obstruction. With Bionaire brand technology, you can live in harmony with nature for a serene home environment. COLOR: Black. Product Dimensions: 4.5 x 27 x 9 inches. Fit: Window fan has been designed to fit double-hung windows with minimum openings of 25.59 wide x 7.87 Inches high. Total extendable width is 36.69 in, includes built-in extender (6.69 in), 2 pcs of slider safe extender panels (2.36 in each), and window fan (25.59 in) The slider safe extender panel can extend the width of the fan to 6.69-8.66 in.