Hon&GuanPRO 6 Inch Inline Duct Fan - 405 CFM with Quiet EC Motor & Temperature Humidity Smart Controller, Ventilation Exhaust Fan for Heating Cooling, Grow Tents, Hydroponics (Black&Orange)

This fan doesn’t just blow — it evacuates heat like it's got a grudge. My crypto miners were cooking a three-course meltdown, and this thing stepped in like, “Not today, Satan.”It’s quieter than a VPN subscription and cooler than my ROI. Five stars. If it were any better, I’d owe it a cut of my Bitcoin.

I was undecided on 4" or 6" fan for a small area, but i got the 6" which has surpass my expectations. A little overkill, but it gets that heat out fast!

Amazing, just amazing. I wish my friends grew too so i could share my love for this fan. this + spiderfarmer are my go to grow brands these days 100%.

This inline fan and controller work great. The fan is very well-built. This is immediately apparent when it's plugged in. It is quite, I use it a s a booster for one room additional ventilation, using speed setting "2". I can not hear if from the room. Even at speed #3 it is quite enough.

Works great but a bit pound on full speed though that is to be expected

I use this for ventilation on two 3d printers. The unit it replaced was much louder, and did not move nearly as much air. One of my printers needs ventilation to keep the chamber temp below 35c, and I like that I can use the temp/humidity probe to automatically control the fan speed. Works very well, and the lower noise together made this a very worthwhile upgrade.

Moves lots of air for its size

Easy to understand and use the controls. Fan is quiet and moves a lot of air.