Hon&Guan 4 Inch 212 CFM Air Filtration PRO Kit for Grow Tent Ventilation System, 4" Inline Duct Fan with EC Motor, Smart Temperature Humidity Controller, 4" Carbon Filter & 8 Ft Ducting

Decent budget filter I've had a few this year and they work pretty well never had a issue

Pain in the ass by yourself (esp if you follow pictures illustration) connect exhaust hose before hanging. The exhaust hose is exact to the exhaust port,some wiggling is almost assured to be needed with it hanging and potentially swaying makes it difficult. That being said it is super quiet, blowing nicely. For my 1st one quite satisfied. Footnote "control hub" gets extremely hot if ran at max for length of time.

So far I’m incredibly impressed. I bought this to use in my grow tent for plants. Other brands like AC Infinity and VIVOSUN charge a ton for their inline fans with filters, and this works great for my 4x2 tent. I talked to a fellow grower who claims to have been using his fan for going on 8 years now! It is a bit loud but I don’t care. Haven’t reached the flowering stage so I can’t say for the smell there but it came with 2 charcoal filter sleeves and I can’t smell it when I feed my plants. It’s made out of plastic but it’s solid and looks good.Edit- i should have purchased the 6 inch inline fan for my 4x2 tent. The 4 inch struggles to keep the temps below 90 with the lights on and 2 oscillating fans running, it just doesn’t pull enough air. Will review the 6 inch when it’s installed and has been used.

This is a great system, automatic. Easy setup, I use zip ties to attach it to the top of the tent.

For the money it's a really good fan and controller. You can set the time for the fan to come on and off, and if the temp gets too high, low, the humidity changes, they are cycled up or down.

Awesome airfilter! Effective and quiet. Just what I needed for jump starting my garden!

I bought this to help alleviate the cat litter box odors since our cat is lazy and doesn’t cover his waste. It does seem to be working well for that after 1 day.Two things I am not too thrilled about, are the noise and the duct. The fan makes a clicking sound and is audible even on the lowest speed. When turned up the fan is louder than 28 db. I’m guessing that rating is more accurate for the slowest speed.The duct is much cheaper looking than the picture shows. It is more like a cheap vent and less ridged than the picture makes it appear.Would I buy it again, not sure. It is a good price for all the materials but is not so great.

Works very well for moving air around. Does pull air out but so far my tent heat hasn't went down much. The controller feels a bit warm and makes me nervous.