VIVOSUN AeroZesh S4 Inline Duct Fan, Quiet 4" 208 CFM Ventilation Exhaust Fan w/EC Motor and GrowHub E42A Temperature Humidity WiFi-Controller - for Heating Cooling Booster, Grow Tents, Hydroponics

I am using this to increase crawl-space ventilation. It has been quiet, reliable, and effective. I especially like being able to check and control status from the app.

My oh my... lets start at the beginning. The packagaing first abd foremost abd most important. Comes in a very nice bixox very well packaged. Hub controller came neatly packed in its own box with display cover, that was the. Placed very snug and safely inside the packaging. The fan itself was incased in a form fitting impact formed styrofoam to protect from shipping damage. All items came out of box like they were right off the manufacturing line. Now to the good stuff. The weight of the fan vs the output is outstanding. Were all use to if you need cfms the fan usually has the weight behind it. When i plugged this up for the first time glad i had teo hands as the hurricane force winds came rolling out of it. If you like your fan to hang or be on top have no fear as this is the lightest fan i have ever felt, zero bending on the rods that hold it airborne above the fruits. Installing the controller with supplied temperature and humidity sensor was a breeze, simple usbc connection to fan and 3.5mm jack for the sensor. The screen came alive and was off to linking the controller to the vivosun app and wifi which was a breeze. Note it only supports 2.4ghz wifi not 5g wifi networks. All in all maybe 10 minutes to setup. Will certainly be linking my light to the controller as its a all in one hub. Vivo has really got the growers struggles in mind and are there to support every step of the way as needed. Love this product and will certainly be getting the smaller fan for an intake to link in as well. Five out of five, slam dunk, grabdslam touchdown this product is what you need. Love what you grow and what you grow will love you with this setup.

The fan is great, it’s a little powerhouse and the noise isn’t bad even on max. If your tent is closed you won’t really hear it. Now the controller is where the real fun begins. It has a ton of options, sets up quickly, and looks pretty sweet. You can control spectrum, have multiple lights connected, and all the cords are proper lengths for any setup (I put in 4x8 and had plenty extra). It hooks to wifi and the app is super easy to use. Took less than 5 minutes to setup parameters for ventilation for temp/humidity triggers. You can also do things scheduled but I prefer only kicking on if it needs to. Overall, it is a controller for your tent and that’s exactly what it does. It makes it painless to setup. Definitely worth the value. If I ever get another tent setup I will definitely be using this again.

Ramping up my laser engraving business required me to find some kind of exhaust fan to handle the fumes/smoke. I was extremely pleased to come across this one! Well built and VERY quiet in the lower speeds. Even at the lowest speed, it will easily handle the smoke for simple engraving. Upping the power to around 5-6 vastly increases the air flow while staying tolerably quiet. At its highest speed, it's a BEAST. I hadn't secured on vent coupler and it blew it off! While this is not the cheapest fan you'll find on Amazon, I feel it's a very good value and the build quality should provide years of carefree service!

Great quality fan. Do your research to mount. Use for grow room with zero problems just had to DIY mounting to ceiling. Keep it at 50/10 timer and usually never above level 5. Above level 5 fan speed its get loud! As it should but be forewarned max fan speed is shop vac decibel level.

Worked great for my grow. Easy to setup and use.

I ABSOLUTELY LoVe this fan and grow app!!! Makes it a lot easier to manage my girls.....💯❤️

You can control your environment from anywhere