Optimus F-5280 7-Inch Twin 2-Speed Window Fan, White

Optimus 7 inch twin window contains a 2-speed rain resistant motor for efficient air delivery. Fan is manually reversible to pull cool air in or push stale air out and both sides contain speed control. Fan includes built-in slide screens to close in extra space on either side of the fan. Includes a carrying handle for easy transport and installation, plus feet for free standing operation. Fan comes fully assembled and ready to use, no tools required for installation. Safety grill to protect fingers from fan blades.
Customer Review: One big issue
Cons: 1. One big issue. Attempting to actually clean the screens and fan blades of this model is futile. Once the screws are out of my old, now burnt out, Lasco twin fan model, you can easily clean the screens and fan blades. I had so much difficulty prying the screens (back and front covers) open I decided it was engineered to not be opened. Thus, after a few years the fans will be junk long before they burn out. Pros: 1. Reversible with controls on both sides of the unit. 2. Great airflow. Recommendation: I recommend a box fan, unless you don't have room, because you can mount a 20 x 20 filter on the back, using duct tape or installing u-brackets on the back so you can slip the filter into the brackets. These dual fan's are not so easy to adapt to a filter. The filter will significantly reduce the amount of dirt on your screens and fan blades so you only have to clean them every several years, plus it'll cut down on pollen, etc. in your room.