MARS HYDRO4 Inch Inline Duct Fan with Temp Controller, Exhaust Fan for Grow Tents, Hydroponics

Good product

I love this fan it is very quiet even when it is operating on a high setting

The media could not be loaded. This is quite possibly the best in line fan ever. Not only does it completely sustain a 3x3 tent, it literally sucks the humidity out of the whole room as well. The fact that it has a temperature and humidity sensor just sends it over the top. The mountable controller makes changing settings a breeze. The automation is a must have, I do not know how was running a fan full blast 24/7 before. Probably because there was no solution like this out there. Mars Hydro has really outdone themselves this time. Top of the line fan with a great controller. I will be ordering more for my other grow area. I can honestly say that Mars Hydro products are some of the best in the game right now. They have come a long way and continue to impress me.

I've only been testing this fan/filter for a few weeks, but so far I'm very happy. It moves a ton of air in my 4x4 and the fan (which I installed inside the tent) is decently quiet when cranked up to max settings.It was very easy to assemble and install, and I have no experience with these kinds of things. I did opt to seal the ducting with aluminum foil tape in addition to the hose clamps -- the tape needs to be bought separately. That said, I don't know if that's even necessary.The smart monitor is REALLY nifty. Tons of settings to automatically adjust for different scenarios when certain conditions are met. When I thought I had a problem with the monitor (it was actually just me being dumb though) customer support responded to my question in a few hours. Really can't complain!I'll try to update a year or so down the road and let you know how well it ages. In the meantime though, I'm a happy camper..

UPDATEDSeller has great customer service. I contacted regarding details as to the fan I received and Mars worked quickly to resolve my issue and were very polite.The fan received is great quality. Very similar to fans priced 50$ more, The Mars fan has a great green color and all the same features.I will buy again and would advise anyone wondering about this fan to purchase. Controller works and the fan moves air. Pleased with my purchase. Thanks Mars

I set this up in my bathroom because My wife be eating Taco Bell and her poo smells horrible. This fan gets the smell of rancid poo out the bathroom. Thanks Mars Hydro!!

The fan is okay, maybe a little louder than I expected but still ok.I’m giving it a 1-star because the billing was completely botched, not sure if this was Mars Hydro or Amazon, but this forced me to get a new credit card and wasted an enormous amount of time dealing with fraud claim which ended up being a false claim and having to re-do most of my auto-payments. It was initially billed the correct amount, $139.36, a couple days later I saw a pending charge for $59.73 without any vendor information which I reported as fraudulent, almost a week later I saw yet another charge for $79.63 and the next day the original $139.36 posted charge was reversed, but by then I had already received a charge credit and a new credit card.Why was the $139.36 amount for the fan split into 2 charges ($59.73 + $79.63) in multiple day transactions is beyond me, I was going to buy more accessories from Mars Hydro, but no more.

Been running for two years almost non stop. Still going!