MELONFARM4 Inch Air Carbon Filter Smelliness Control with Australia Virgin Charcoal, Odor Removal Carbon Filter for Grow Tent, Inline Fan, Hydroponics, Pre-Filter Included, Insulated Flange 4" x 11"

Bought to use on my laser engraver so i can have the window open. So far its working great! Cant smell anything more than i did with it vented out the window using a dryer vent. Infact it might even smell less. So far im engraving coated stainless flasks. Havebt tried it with cutting or engraving wood. Kinda curious to see how well it will work or not. Works extremely well and i cant imagine paying nearly double the price would get any better performace.

So far seems good. I don’t even need to use ducking with this. I have it connected directly to the in-line fan and this just sits right on top of the tent. My set up is so small and this is such lightweight. It works great. It doesn’t prevent airflow issues. It doesn’t stop the suction from the exhaust fan. The degree of pressure that comes out is the same. It’s just filtered which is ideal for gardening and I was surprised that the function for how inexpensive this was I definitely recommend it.

It's cheap. It works. It's made well enough and doesn't weigh too much either. These cheap carbon filters usually last me about a year or so, running 24/7, at half to full blast the entire time.

Works great as a filter, but it has an opening at the end of the interior screen that allows the charcoal to fall out if tipping the filter any direction but with the flange up. Had to seal it with duct tape.

I have used this filter now for over a year in a 4x4 tent. This completely prevents any smell from getting outside the tent. Better price than the others and worth it.

Pre-Filter is made very cheaply, after removing it and cleaning it started to come apart with little force on reinstall. The Filter itself is good but not the pre-filer. Luckily I have old pre-filters that fit and don't fall apart.

It works great for keeping the odor under control

It is cheaply made and does not filter smells. I guess that's what you get for buying cheap.