4 Inch Duct Fan, Inline Ventilation Exhaust Fan, 280 CFM Duct Intake High Efficiency Air Fan for Vent Bathroom, Kitchen, Grow Tent, Hydroponics, 3D Printer

I did not use this for the typical use case I have seen for this product. Where most are using for plants I am using it to pull fresh air from a vent I put in a soffit then through 6 inch duct to a filter box that holds a 14x20x1 filter, then this fan, then a vent into my office. I was worried if it used IR I would not be able to control it as its on the other side of the drywall in a crawl space, however the remote works perfect.In addition to it working though walls which was a primary use case it also moves an incredible amount of air. I run it for 12+ hours at a time and I am showing no degradation after months of use which was a concern. Out of a 6x12 standard HVAC vent I am getting 12mph wind using my Pyle PMA82 Digital Anemometer. I have it pulling from a filter box so if you didnt use a filter box with a MERV 14 filter it likely would move even more air. I estimate for my office which is about 500 sqft with 9 ft ceilings I am swapping all the air in about 20 minutes. I measure CO2 in my office and it went from 1200+ to 540. I can also use it during the day when its 65ish outside to keep my office around 72 degrees which is pretty impressive as 3 walls and the ceiling are outside walls and in TN even in Feb the sun can heat things up. No need to use the AC.Very happy with the performance of this fan and the remote. I do need to figure out what frequency it uses so if something happens to the remote I can replace it. I have a flipper zero so I might see if it can see what its using.

Great littel fan for the small paint booth. Great feature is the ability to take the motor out of the frame so can attach the base to a wall for better placement inline in the ducting. The removable clamps make it easy to install and mount. Another great feature is the remote so you do not have to have the unit within arms reach to turn it on/up or off.Very happy with the perfomance painting so far, works great at removing the air from the small booth and area. Unit is not very loud at all either, Hard to tell when it is on.

Fan works well. I have it installed in my crawlspace. Some people were concerned about the noise but the fan is quiet and no one has noticed the sound in or outside my home.

Works well but did not move.much air. Returned it to get 8" model.Good for.small space.

I purchased the Voltset 4" exhaust fan (270 CFM) to improve ventilation for my laser wood-cutting setup, and it works great. The fan moves a lot of air efficiently, quickly clearing out smoke and fumes. It also handles high heat well, which is essential for my application.The fit was perfect for the existing opening in my Roly Automation laser diode machine, making installation straightforward. I still need to mount it for the best performance, but so far, it's been a reliable addition to my workspace. If you need a strong, durable exhaust fan for laser engraving or similar uses, this is a great choice!

Very satisfied with fan it is quiet and efficient

It’s not as strong as I thought it would be, don’t expect it to perform well as a dust remover in a work shop. Good enough to create a little ventilation for a shed or garage or maybe if you’re smoking a cigar in your garage it will suck out the smoke, but that’s about it!!! It had 2 speeds & it’s actually quiet, but should have went bigger.

Replaced a smaller unit. This one is moving much more air. I like it.