4" Inline Fan with EC Motor, Metal

TLDR: 🌟🌟🌟🌟🌟 An inline fan that's a powerhouse in airflow, whisper-quiet, and energy-efficient - perfect for our indoor garden! 🍃🔇 So, we've got this new inline fan for our 4x4 indoor garden, and it's an absolute beast at moving air! If you're setting one up, make sure your tent can handle the suction, or it'll be like shrink-wrapping your plants. We've linked it to a temp controller, keeping it at a cool 30% speed to get rid of the extra heat. Pros: Solid build quality - it's metal all over, except for the plastic impeller. Setup is super quick and hassle-free. Power use? Only 15w at the lowest and 25w at full blast. It's so quiet, you'll forget it's there. The airflow is surprisingly powerful for its size and energy draw. Attaching a 4in duct is no sweat. Snagged it at a fantastic price initially. Cons: It's locked to its own speed controller – no universal compatibility. Noticed a price jump after our purchase. Lacks auto adjustment features for humidity and temperature. Energy usage? It's a dream. Running this fan at 30%, with a small fan and a 135w light both on medium, we're only using about 90 watts. That's gentle on the seedlings and the electric bill. Crank it up for the growth phase, and it's still a lean 130 watts. Our electricity costs are laughing – this setup's costing us about $7 monthly. Haven't tried it with a filter yet, but we're eyeing up another fan and dual filters from the same maker for a future upgrade. In a nutshell: This inline fan is a star performer. Robust, ultra-quiet, and energy-conscious, it's a must-have for any indoor gardening aficionado. My one gripe? I'd love a feature to control the fan speed automatically based on environmental changes. But overall, it's a purchase I'd repeat without a second thought.

this little fan is awesome. previously used the vivosun 4in, but the last one i purchased was probably defective and far too loud. it eventually died. to their credit, vivosun did give me a prorated refund at about 90% of purchase price. that said, i’m soooo glad i spent the extra money to purchase this fan. the small size surprised me, and this review may change if the small, lightweight size can’t handle normal use. but, for now at least, two weeks in, its worked like a charm. the small size is misleading; the thing really moves air well. bonus is the power control; it comes with a cord that is long enough for pretty much anything. moreover, the noise level is neglible; the device is whisper quiet. finally, being able to adjust a full 100 percent is so intuitively right, i am surprised more fans with speed control don’t allow full control. very happy with the purchase.

This fan is well constructed steel. It moves sufficient air and pretty quiet. I bought the digital speed controller and prefer 5/8 for best CFM/Noise. However, many times when I turn it on the controller beeps, shows backward '3' presumedly for 'Error' and the fan will not start. Emails to terra-bloom support have yet to be answered. Update. Support said "...typically caused but inconsistent connection between the speed module and the fan. Please try to unplug the cord from both sockets, swap the jacks and plug them back into sockets with some force, the jack in the fan’s socket has to “click” into its spot." So far, this has fixed my issue.

I was browsing through my old purchases and decided to leave a review on this. I installed this against the wall with the fan throwing air up. It has two of the shiny flexible metal aluminum? laundry hose/pipes, on either side of the fan. One hose runs up and out of the house. The other runs from the fan down to the sump pit and tosses stale air out. It has been running non-stop since it was installed years ago (bought in 2020, still going in 2023). It runs constantly at a lower fan speed level, but I do occasionally turn it up from time to time. I just wanted to leave a positive review because it seems like most stuff doesn't last anymore, so I greatly appreciate that this company made a nice fan that is still working. Thanks!

I chose this over the similarly priced competition for a variety of reasons: compact size, higher static pressure (vs. raw CFM), metal enclosure, etc. The online documentation, utoob videos, independent testing, and technical information provided by customer service was icing on the cake. And if I ever want to geek out and hook up a raspberry pi, that option is available too. As far as noise, when on levels 3-6, it is much quieter than my previous fan -- a win for me. Overall, it will serve my purposes well, and I hope to get a nice, long service life from it.

This fan exceeded my expectations. I have it in a 30 sqft grow tent and have let it run consistently 24/7, only turning it off to water & rotate my plants, for the past 11 months. Being that my tent is not overly large I have been able to keep the fan relatively low between 25-50% of the max while still moving sufficient airflow through the tent providing plenty of ventilation to my plants. Over these past 11 months it has remained quiet, has never run hot, and has had no quality issues whatsoever. This is an all around fantastic product and well worth the money

This fan dials down to low speeds very well, and it's very quiet until it's turned up past 2/3 speed. Then it's audible, especially at max, but not obnoxious. It's a higher pitch, kind of a whine sound. I'm very happy with the purchase, the control knob feels solid and it's built very solidly. I'm using it for a home, wine fermentation chamber and I need it to go very low to create enough vacuum to get rid of the gasses, but I don't want all my HVAC going out the vent. And If I need to exhaust the whole garage, I can pop off a duct cap and run it on high. It's great!

Amazing fan, so happy I found terrabloom. Ecm fans should be the current standard for all grow fans however this is not the case. Don't be fooled by other nice looking fans that have 60yr old fan technology inside. This paired with a good led grow light and you have a super efficient setup with infinite control over air speed instead of just a few speeds, and it will last longer, use less power and be more quiet.

Works great out of the box. Long power and speed control cords. Fairly quiet too! Was my first exhaust fan so I really have nothing to compare it to. Had a defect and was still under the 2 year warranty. The sales rep I spoke to had my replacement unit sent out within a day of the inquiry.

It never died! 1 year, never a break and running speed 3 and 4. Good and quiet at low speeds... and has not died yet! It exceeded my expectations for a budget priced fan, I can say its worth the price and more!

Started making a minor bearing noise. We'll see how it goes.

Le ventilateur est facile d'installation et il est possible d'acheter un adaptateur pour une télécommande sans fils! À faible vitesse le son est négligeable. À pleine vitesse il faut s'attendre à un son plus important, ce qui est normal pour un ventilateur.