Genesis Twin Fan High Velocity Reversible AirFlow Fan, LED Indicator Lights Adjustable Thermostat & Max Cool Technology, ETL Certified, White (A1WINDOWFAN)

***UPDATE after one month of use*** I stand by all the details in my review below...but just want to add: I could not be happier with this fan. It appears to move more air--with less noise and more speed--than my old work horse Honeywell fan that I was replacing. If I had the choice to repurchase this fan...or my old Honeywell...I would choose this fan.***********************************************This fan replaces my inherited Honeywell dual fan (it was at least 30 years old...probably older). It was powerful...and was made when most fans were still made with metal blades. Consequently, it was very powerful for its size. As far as I'm able to tell fans of this style are no longer made with metal blades. The modern version of this fan appears to have been discontinued. I used my fan mostly to cool my bedroom by setting it for exhaust in the window of another room... with the windows in my bedroom open. It was very effective for this and on all but the hottest nights allowed me to turn my A/C off. Using a fan to draw air in this way requires a fan with a high CFM rating.I looked at a lot of the fans of this style that are being made today. None have all the significant features of my old fan. This fan had most of them...reversible (with the ability to have one fan exhausting with the other drawing), locking expandable side panels to give a good fit (important if you are using for exhaust), and a high cfm capacity. Many of the fans now made don't even list their cfm rating...this one is listed at over 700. (By comparison the new Vornado Transom fan--that many sources are rating as the best window fan--only moves a measly 80 cfm. I have one of these...and I love it for certain things. But it is completely unable to move enough air to cool a room as I describe above.)The main thing this fan doesn't have is the ability--when using for intake--to direct the airflow for each of the fans with rotating grills. I LOVED this feature on my old Honeywell. No fan currently being made--as far as I could discover--has it.I would prefer that it didn't have the bright LED lights. But I can live with this. If I were keeping the fan in my bedroom, this would bother me.In the comments for this...and similar fans...there are a lot of complaints about the "cheap plastic." Fans are plastic now. This will always feel flimsy and insubstantial...particularly in one that is supposed to be light enough to sit in a windowsill. This one feels pretty normal in that regard.The comments about noise level are all over the map. Fans are noisy. I didn't see a decibel rating on this one...but I found this one to be less noisy than most.There are also complaints that it "doesn't cool." Fans don't cool. They move air. This one excels at moving large volumes of air. If you are trying to get cool air in...or hot air out... it does the job well.

This unit is exactly what I needed. Draw in cool air. Blow out hot air. One can even draw in air while the other blows. I used this option often while prepping my bedroom a few hrs before bed. Good speed. Sound helps me sleep. Not obnoxious. I need my room to be very cool/cold in order to sleep. I do not want to use the HVAC throughout my entire living spaces just to cool one room. I have not had any issues. Very easy to place in window and operate. Its basically a boxed frame that holds two fans. I used it every night. I still have it in my window during very cold weather because the air will flow thru the blades without having it on. For me, it is very much worth the purchase.

I moved into a new place where its harder to step outside to smoke, as I will make a lot of noise climbing down stairs disturbing the family below. As a result I started smoking in my room and required a powerful exhaust for ventilation . I already had a pretty good exhaust fan from a brand called Duracraft (have a small table fan from the company too) , not really sure how I cam to own the thing but it worked like a charm and had enough functions to make it flexible to switch each blade manually in or out and each with its own power setting. Thing worked like a charm and kept the room fresh untill recently something knocked loose and seems to create a loud unpleasant squeal in one of the fans. lacking the tools and time for repairs I found a quick replacement from a dollar store. The $30 POS Comfort Zone replacement was a complete disappointment, not only it was completely featureless but the one thing it was to do it was quite weak at doing. And since sun has been invading the earth as of late, I have invested in an AC but cannot get rid of the pockets of stale smoke from the room. As a result I found myself on Amazon looking for another replacement from Duracraft. Either the company shut down or got bought out a while back since I could not find anything.The next best thing was this model being promoted on Amazon top picks and all accounts seem to confirm it at least is powerful enough to create good suction. I have had it for almost a week now and I can confirm it is a worthy replacement. Its remarkably silent on its highest settings and walking in to the room after work feels quite fresh.However, I do have to admit for the price I paid, I was a bit disappointed with the lack of options and flexibility as my beloved Duracraft. Not only can you not control speeds of individual fan, you cannot move the vents around to direct airflow. The knobs that switch the direction of the airflow feels a little brittle. I get the feeling fiddling with those things too often will result in the plastic knobs breaking in my hands. The thermostat is alright but not much useful for me as I just like to keep the thing on full blast on cool nights and open the adjacent window to let some fresh cool air in like tonight as I am typing this. The biggest thing is that the fan actually makes a electrical hum on lower speeds. Its almost as if the motor has to force itself to slow down. Like pushing the breaks on full throttle. None of this is a deal breaker as I mostly use it to push out smoke and stale air from the room so as long as it does the one thing it can do I can bear with the lack of options.I donated the 30 dollar replacement to the family downstairs as they have a habit of setting off the alarm when they cook. I was thinking about trashing the older model but this particular made me appreciate the option my Duracraft allowed me so I am thinking of cleaning it up and taking it to a repair store to get it fix so I can have two fans on each window for excellent airflow on cooler days when the AC is removed.

We have two of these (one to blow air into the house and one to blow air out of the house). They work well for ventilating the house when the weather cooperates. Even if the temperatures aren't the most agreeable, the thermostat settings work perfectly. The adjustable sides do get stuck, so I wouldn't use it without a window screen.