When set to exhaust mode, it's basically doing nothing. I do like the option to set a temperature and allow the fan to to turn on and off as needed, but it's not as strong as I expected in either mode.

This quite possibly might be the worst fan I have ever had the experience of using. This is not just a waste of money but a waste of space in landfills cause thats where they will all end up. It has a cool design thats all, but it puts out less air than a fart.

We own 4 of these. They've all started out great, but two, after a few months of use, suddenly got noisy. They both make loud, annoying, grinding and squeaking sounds. It's not the housing rattling, it's a flaw in the motor. The other two sound like they always did, but I imagine they'll eventually start doing this too. I'm really disappointed.

I bought this last year because my twin window fan was brittle from being in the sun for years. I thought getting something Alexa controlled might let me do more for controlling it, but I was wrong. And the basic controls leave much to be desired. when you set a temperature for it to come on at, it has no range so when it is over, it is on. as soon as the cooler air gets pulled in, it is off. then it heats up and is on again. right now it is off for 10s, then on for 40s. even though I would not call it loud, the stopping and starting draws my attention and makes the noise very annoying. a better design would have a temperature zone so it cools a little past what you want, and then gives it time to get back to the set temp before kicking back on. As for Alexa, you can cannot access the internal temperature sensor to write a more nuanced program to control it. you get stuck with the basic on/off at a single temperature. but you can have it change the fan speed at different times of day so I could have it turn on to full at night to get in the cold air, and then switch to only switch on during the day if the temperature was above a set point. Overall, the build quality is great, but the design of the controls sucks. also note, that the controls are on the lower right side so that you have to access that point. and it will not sit at the top of the window to vent hot air in the room, only at the bottom of the window.