Bionaire Twin Reversible Airflow Window Fan

This is a wonderful window fan and operates as advertised. I set up another table fan on the opposite side of the room and then with a ceiling fan pushing air down, it creates this wonderful window vortex that get a very hot 3rd floor bedroom manageable. The only dilemma is I live in a very humid area and we are experiencing a heat wave with high humidity and occasional thunderstorms. The indoor humidity throughout the house skyrocketed to 64-70 percent for 2 days and dust mites took over the house. When I removed the window fan, the indoor humidity plummeted 8 percent in less than 30 min. I did a solid job installing this fan with added rubber insulation to get a better seal, but as with all window units, some air from outside still seeps in. If I lived in a less humid area, this fan would probably be just fine.UPDATE: I am so glad I did not return this fan because of the humidity issues. I was contemplating adding a 2nd ceiling fan in the lofted 3rd story bedroom to push hot air down the staircase. It would have been expensive to hire an electrician to add another ceiling fan and it dawned on me that I had the perfect solution. The existing ceiling fan over the bed pushes air downward, and this “window” is now on the floor next to a lofted staircase, and it is drawing the hot air out, thus creating an even better downdraft from the ceiling fan. There are also two small tabletop fans located in opposite sides of the room, drawing hot air out of the corners and into the middle, thus being sucked out as well by this floor fan! The temperature is still quite high in lofted bedroom, but with this incredible air flow it does not feel hot at all.

I wanted an expandable window fan for my garden shed, and this worked out perfectly. My windows are 48" tall x 36" wide, so I was concerned about the expansion width being enough to fit. I used the 2 solid expansion panels on the left side, and pulled out the sliding panel on right to fit the opening.This fan is relatively quiet, and puts out a good airflow. A real plus for me is ability to fit into the window in front of the screen with no issue. The slim width easily allows for this, as you can see from last photo, taken from outside the building.You can see from photos the fan fits nicely into opening, but there are very small gaps where insects could get through. Since I have a screen on the window anyway, this is no issue for me.The only thing I see that could use design improvement, are the locking tabs on the expandable side. they are pushed outward to unlock, and inward to lock. this is fine on the top side, but basically impossible on the bottom side, since you have the fan placed in the window opening against the bottom edge! I was able to manage it eventually, but wouldn't want to repeat it more than necessary (like once or twice a year!)I also though a remote was dumb and just another thing to keep up with, but have actually grown to like using it from my potting bench to adjust the air as needed.I had considered getting 2 of these - one for each side that could blow in and draw outward, but now I do not feel that is necessary. If I do end up trying that configuration at some point in the future, I would certainly purchase another like this one.Sure, the price is a bit more than the majority of the other brands (typically around $39), but well worth it for decent quality.I am happy with this purchase!

I have 2 of these Bionaire window fans installed and each runs several hours per day in the warmer seasons. I live in New England. The 3rd Bionaire is scheduled to be delivered today. This is the quietest and most effective window fan I have found. Nice options too - 3 speeds / intake or exhaust / on-off auto control using built-in thermostat / remote control. I taped a cardboard flap over the LED temperature display because it was too bright for me at night, in my bedroom. No big deal. Thank you Bionaire.,

Works really well! Fit our bedroom window perfectly & cooled it down wonderfully. However, not ideal when you works nights. I didn't think about how much light a window fan would bring into the room during the day lol. Considering we wanted to cool down the room as we slept, we couldn't use it cause it let the sun in. But I do highly recommend it for bedrooms. Not sure how well it would work in a bigger room, like a livingroom.Its a very loud fan, but I prefer white noise, so it didn't bother me. The controls are also a bit odd. No high & low, just power. You have to press the power button several times, to cycle thru the speeds. I hate that.