VIVOSUN 4 Inch Inline Duct Fan 100 CFM, HVAC Exhaust Ventilation Fan with Low Noise for Basements, Bathrooms, Kitchens and Attics, Silver
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Availability:
In Stock.
Arrives
Wednesday, Jul 15
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Size: 4"& No Speed Controller
Features
- Durable Fan Material: Constructed from reinforced and corrosion-resistant metal for long-lasting reliability; The fan has a strong motor which features a permanently lubricated bearing that operates quietly and requires no maintenance
- Compact But Efficient: This duct fan is compact and lightweight enough to be installed in areas with little available space; With a diameter of 4 inches, speed of 2930 RPM and 100 CFM air flow
- Low Noise: Superior balanced centrifugal impeller for long service life & quiet operation; A less than 30 dB noise level does not have any harm and will not disturb your work
- Wide Applications: You can have it in bathrooms, kitchens, workshops, basements, attics and etc, in order to boost airflow in HVAC systems; Also, it can be used in grow rooms as intake fans or exhaust fan
- Specifications: Voltage 110/120V, Power 14W; Max Operating Temp of Motor is 130C / 266F; Max Ambient Temp is 60C / 140F; Note: Please turn the fan off immediately if the blades get stuck by other objects
- To maintain optimal performance of the exhaust fan, clean the fan after the first week of use with the carbon filter connected, and then clean regularly based on usage conditions
Brand: VIVOSUN
Color: Silver
Electric fan design: Exhaust Fan
Power Source: Electric
Style: Modern
Product Dimensions: 4"D x 7"W x 4"H
Room Type: Bathroom
Special Feature: Lightweight, Portable
Recommended Uses For Product: Basements
Mounting Type: Duct Mount
Power Source: Electric
Room Type: Bathroom
Special Features: Lightweight, Portable
Recommended Uses For Product: Basements
Mounting Type: Duct Mount
Controller Type: Button Control
Number of Speeds: 3
Noise Level: 30 Decibels
Wattage: 14 watts
Number of Blades: 3
Air Flow Capacity: 100 Cubic Feet Per Minute
Speed: 2930 RPM
Voltage: 120 Volts
Switch Type: Push Button
Indoor Outdoor Usage: Indoor
Control Method: App
Is Product Cordless: No
Number of Power Levels: 1
Motor Type: Brushless
Smart Home Compatibility: Not Smart Home Compatible
Installation Type: built-in
Material: Metal
Blade Material: Plastic
Color: Silver
Electric Fan Design: Exhaust Fan
Style: Modern
Finish Type: Painted
Collection Name: Inline Duct Fans
Item Dimensions D x W x H: 4"D x 7"W x 4"H
Blade Length: 4 Inches
Item Weight: 1.7 Pounds
Cable Length: 5.5 Feet
Size: 4"& No Speed Controller
Brand Name: VIVOSUN
Included Components: Cord
Model Name: vivosun
Model Number: 331101-4
Manufacturer: VIVOSUN
Warranty Description: Manufacturer Warranty for 360 days from date of purchase.
UPC: 714119466250
Part Number: CECOMINOD070342
Unit Count: 1.0 Count
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Wednesday, Jul 15
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Size: 8"& No Speed Controller
Installing was easy, worked well this winter to keep our kitchen warm,noise wasn’t an issue
Reviewed in the United States on May 18, 2026 by bobbie brown
Size: 8"& No Speed Controller
I don't care about plastic housings and I'm happy to wire my own switches where relevant, so for me and the applications for which I use fans (in this case, cooling inside my truck/paired with optional swamp cooler water flow), this is awesome bang for my buck. It's a bit loud but I don't care, that's to be expected when going for something with high airflow. I do wish I'd considered getting a couple of different sizes because this is actually more powerful than I need for its current use, but that's fine, sooner or later I'll move it and the attached swamp cooler setup I built to a different larger space and build a new smaller one for my truck. I'd much rather overengineer something than have it be insufficient (like my first pitiful swamp cooler attempt with computer case fans -- fun starter project to learn about wiring in series and wiring a three-prong switch, but totally inadequate for cooling the inside of a Ford Explorer!). So yeah, can't speak to how good this is for actual use in ducts, but as a cheap powerful basic fan for a DIYer doing something fan-related, it's a great buy and I'm thrilled I got it. The only way it could be more perfect would be if it had an on/off switch already integrated into the power cord, but that's not a big deal and of course it's not like it advertised/implied that it would have one. It's exactly what I expected, except more powerful. Everything about it seems solidly made and I anticipate it'll last a very long time. I'll most likely buy from this same manufacturer again in the future when I need fans of other sizes.
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Reviewed in the United States on July 22, 2021 by Emerald Bixby
Size: 4"& No Speed Controller
The fans work fine, but because they are low CFM, they won't open my butterfly dampers. I had to step up to stronger fans. These aren't terribly noisy, so if you aren't using dampers that require air flow to open, they're a good, affordable choice.
Reviewed in the United States on February 26, 2026 by KSF
Size: 4"& No Speed Controller
The VIVOSUN 4 Inch Inline Duct Fan with 100 CFM is an absolute must-have if you own a Keystone RV, especially models like the Avalanche 390DS. The lack of proper airflow in the HVAC system of these RVs, particularly in the rear bedroom, can make it unbearably hot. Keystone's quality control issues only add to the frustration. Installing this ventilation fan was straightforward, and the difference in airflow is night and day. The rear bedroom now receives proper air circulation, making it comfortable even on hot days. The fan operates quietly, which is a bonus, ensuring that it doesn't disturb your peace. For anyone dealing with similar HVAC issues in their Keystone RV, I highly recommend the VIVOSUN Inline Duct Fan. It's a reliable solution to prevent overheating and improve overall comfort. 🌬️🚐❄️
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Reviewed in the United States on December 20, 2024 by Alexander B.
Size: 4"& No Speed Controller
At only 100 CFM, this fan isn't too bad. If 100 CFM is what you need. I was expecting more from the design, I guess. With adding an 8 gig video card to my recent computer build, the temps on my chip cooler sky rocket to around 104°F or 40°C on many games, from an average of around 82.4°F (28°C). Which isn't too bad really, but I want to add some filters for dust, & having 104°F pumping into the back room, makes it very hot on a summer day. So I searched around & found this, that I thought would be a solution. I figured it was better than a large Molex powered fan. What I wanted, was to remove the heat that the computer was pouring into the room, with a powerful fan & vent system. All of the air flow goes in the direction of the top vent, & out already. Now I want to pull it out of the room, to the window to the outside. The video card is loud enough on it's own (see review elsewhere), so adding filters to soften the sound, as well as a vent to pull the sound, should reduce it, along with the heat. I looked over Amazon & the net, & found this had the most "quiet sound". Quiet, being relative to the user, of course. Some reviews said it was loud (it is). As you can hear in the video, it is louder than the filtered & non filtered computer. Just to give you an idea. The computer has a twin active fan on the video card, A T-1 thermal tower for the CPU, a 120" side panel fan, & some case fans; on it's own it can be a little loud. Mostly it's the video card, as a simular tower build w/o the 8 gig video card can't be heard (see Black Ice Monster review). So, noise isn't winning any awards. The video is via my phone, not great, not bad. Gaming headset doesn't pick it up, as an FYI. The second & most important thing this Vivosun booster fan needs to do, is evacuate the heat from the computer, so that it doesn't enter the room. The third thing it needs to do (on this checklist), is keep the computer cool. Preferably below current temps, but with in an acceptable range, as long as it's evacuating the room. So far, it's doing #2 alright. Bottom line: With the computer filtered & shut; it will drop the temp about 1-2°C in about 2 minutes. With the side panel off, it will drop it 5°C in 1 minute. The mean running temp in spring: is 35°C (95°F) Under load 43°C (109°F) With the fan off the computer has reached 52°C (125°F) under load on a simple game (Little Nightmares), & the VivoSun brought it down to about 42°C in about 10 minutes. Outside it was around 82°F, the room about 75°F with a pole fan running. So it does alright, just not great. It runs helps at about 5°C on average, but it does evacuate the heat to the outdoors for the most part. I can't say if the 240 CFM fan will do any better as I'm afraid it will be much louder. It's not horrible, just not quiet It sounds like an A/C unit. Oh yeah, it has a tick now after intermittent use in three months. I don't run the vivo fan when just doing text or surfing, only when gaming or doing 3D stuff. Also, the power cord is plenty long great job !! I have it on a wireless remote so I just click & on.
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Reviewed in the United States on June 7, 2021 Reviewed in the United States on June 7, 2021 by FLRHCARR
Size: 8"& No Speed Controller
Works well. No issues.
Reviewed in the United States on May 17, 2026 by Brandon Solomon
Size: 4"& No Speed Controller
Lasted 1 day. I was impressed by its performance when i tested it before installing. Unfortunately it stopped working the same day i installed it.
Reviewed in the United States on May 14, 2026 by Francisco Roman Perez
Size: 4"& No Speed Controller
As advertised
Reviewed in the United States on June 13, 2026 by John Jackson