Vornado TRANSOM Window Fan with 4 Speeds, Remote Control, Reversible Exhaust Mode, Weather Resistant Case, Black, Whole Room

I mis-read the width, this unit is wider than my window by two inches, as I measured the wrong area. Anyhow, using the the included foam blocks to fill under the unit it all fit perfectly to fill the gaps. The unit simply sits on the window ledge, flush to the surface of the window opening. A few small bungee cords attached to scews (picture frame anchors) it easily holds the unit in place with no movement. With this placement, I can even pull the whole unit sightly forward and close the window behind it with the bungee cords. It Works fine.. its quiet, but not silent. I've had quieter fans. Air flow is good, but Static pressure seems to be low, anything blocking airflow like a closed door greatly drops its ability to move air. Crossflow fans like this are effecient, but lack a strong ability to push air through restrictions or into closed rooms.

This fan is awesome. It was easy to install vertically in my bedroom window. I love that the flow can be reversed with a simple push of a button. The remote is also a great feature. Even at the lowest speed, there is significant airflow and it is very quiet. Perfect for sleeping. I would definitely recommend this fan.

Recommended by Wirecutter. Has a handy remote, fan can either blow air in or out. I only use the remote to control the fan because otherwise the temperature setting tends to activate and it won't turn on unless it is above a certain temperature.

The fan itself works very well. It's not too noisy, and on the lowest setting works good as a white noise generator as well as a cooling system for when you're sleeping, depending on how far the window is from your bed (in my case it was less than three feet away from mine). The temperature detection feature works alright as well; you can set it to a particular temperature and whenever the room gets too hot it'll activate and blow in cool air until it gets low enough, after which it'll shut off by itself. Of course this can result in the fan turning itself on and off at regular intervals, which can be annoying. I also like how the fan's airflow can be reversed with just a push of a button, allow air to blow out of the window instead of being drawn in through it. This is handy not just for maintaining good airflow to help get rid of excess humidity, it can also help get rid of smoke and unpleasant odors you might have- one time I was changing a vacuum bag and accidentally spilled the old one on the floor, and this fan helped get rid of the musty smell that lingered after cleanup. The biggest issue I have with it, or at least one that I think most people would have with it, is the foam rubber inserts used to fill in the gaps for the window frame on either side of the fan. They come in three different sizes (1 inch, 2 inches, and 4 inches wide), and I managed to find which ones fit the window perfectly, but it was a bit of a hassle both to figure that out and to actually get them securely in the window frame, requiring me to hold three things steady on one side while I wedged another thing in on the other side. But also one thing to consider is not just the width, but the height- I don't know what your window frame is like, but the inside of mine has a slight incline (probably from the house settling over the years), and the way the fan and blocks are designed they can only stay upright if they're being held snugly between the sliding window from above while sitting on the windowsill, so if your window frame is a bit warped like mine or just a bit lower than usual, the blocks will be too short and fall over. I had to slap on several layers of duct tape on the bottom of each block in order to make them tall enough to fit properly. And of course, if you're taking the fan out of the window to put away for the winter, you have to consider where to put the blocks, both the extras you don't need and the ones you used for the window, so it takes up a bit more space in storage, and personally I prefer appliances like this to have as few loose accessories as possible. Still, aside from the minor annoyances of the blocks, this fan has served me well in the last few months, and hopefully will continue to do so.

The reviews say nothing about how loud it is, but it is powerful and nice to have. Only the alexa version is worth buying IMHO. Follow up: As loud as it is; I leave it on all the time. Even in winter, it exhausts hot air from my place. There is water heater baseboards in my apartment that have no sensor, so it really makes it more comfortable. The non Alexa has survived 2 months, 16 days of being on in the winter. but would the Alexa version? Almost worth it to program it to intake for short 30 second bursts, and then go back to exhaust. Second Follow up: This fan gets quieter over time, and has about the same performance! Found some 3mm dust filter medium, am making a steel/plastic fan filter holder which connects to the fan on either side; for the fan, when it gets dusty merely blows dust around. I could tell my cats were being annoyed by the dust. I used some thin scrub pads for the mean time adhered by black duct tape; and their eyes are much less irritated.