Hon&Guan 3 Inch Inline Blower Fan with Speed Controller 120 CFM with 20W Ultra-Low Power and Low Noise

I bought both this 3"and the 4" version to test out for my camper van. One I will use for my composting toilet. The other I will use for air movement in the main living space until the AC cools down the van. The 3" is a little louder than the 4" but the 3" cranks out way more air than the 4". You can always dial back the 3" to a very quiet hum and even with the lowest speed setting, you get plenty of air flow for the composting toilet. Since the toilet is also in the sealed shower room with a large ceiling, I will need more air vents from outside the room so that when the ceiling fan is on, I can crank up the 3" to avoid back flow air through the composting toilet. The 4" fan is nice but I almost want to use the 3" fan for airflow in the main living space since it makes a better breeze. Even though it is a little louder. The noise is not really bad. Slightly more than the AC noise. only due to the higher frequency which you can turn down as needed. the 3" needs 2.75" pipe adapter to MSTR with a 2” pipe. ~$10 each.https://www.amazon.com/gp/aw/d/B0BQW8W49Q/ref=ox_sc_act_image_1?smid=A34RJ9S07AUY15&psc=1

This little guy is great. I needed an inline exhaust fan for my resin printer and this works perfectly. It’s got more than enough power and I don’t even use it higher than 2/3 of the way. It seems durable and is made of metal. It’s very easy to use and it also works perfectly with a smart plug. The weight isn’t too heavy either and can be mounted if needed without it having too much strain from the weight of it. I didn’t have any issues fitting it to my 3” tubing either. I recommend this if you’re looking for a small inline exhaust fan.

This thing is a joke! I used it once and the fan inside the cheap plastic tube began rubbing only after about an hour. It got worse and then stopped the fan. I think the shroud that houses the fan is super cheap plastic and there is no room for error if the shroud deforms at all. Any deformity in the shroud causes the fan to rub on the inside of the tube, like a clamp to hold the vent tube in place is enough to deform the shroud. This thing is more like a toy than an actual tool that you can use on a daily basis. Not recommended at all.

Small but mighty! I returned my Wecreat fume extractor and am using this little guy to vent out the window. Works great with minimal smell for my 40W Vision. Fits 3” ducts just fine & I love that the control is a turn dial knob vs a cheap remote like some of the other fans on the market.

A Reliable and Efficient Ventilation SolutionThe Hon&Guan 3 Inch Inline Marine Bilge Blower Fan with Speed Controller has proven to be a valuable addition to my marine setup. Its compact design and powerful performance make it a versatile choice for various ventilation needs.Key Features and Benefits:Impressive Airflow: The fan delivers a substantial 130 CFM of airflow, effectively removing moisture, odors, and stale air from enclosed spaces.Speed Control: The adjustable speed controller allows me to customize the airflow intensity to suit different situations, ensuring optimal ventilation without excessive noise.Durable Construction: The fan's sturdy plastic housing and corrosion-resistant components make it well-suited for marine environments, where exposure to moisture and salt is a constant.Easy Installation: The built-in mounting feet and straightforward design simplify the installation process, making it accessible to both DIY enthusiasts and professionals.Quiet Operation: The fan operates at a relatively low noise level, minimizing disturbances and providing a comfortable environment.Overall Satisfaction:I've been highly satisfied with the Hon&Guan 3 Inch Inline Marine Bilge Blower Fan. Its reliable performance, ease of use, and durability have exceeded my expectations.

As advertised. Arrived on time. Light weight and powerful. A little noisy but you can quiet it down with the speed control if necessary. I keep it on high speed to move lots of air.I use it to ventilate my enclosed car trailer when parked in the sun. Works great.

I bought this for my low lying fog machine set up for Halloween. It does a great job of drawing the fog from my containers and spreading it out in the yard through my 3” PVC pipe.

This fan is awesome. I use it for my stool s1 20w laser and combined with the air assist I have, I don’t get char marks on my engravings.