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VIVOSUN 4" Metal Inline Fan 100 CFM, Exhaust Fan for Home Ventilation

Based on 7,071 reviews
Condition: New
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$21.69
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Availability: In Stock.
Fulfilled by Amazon

Arrives Wednesday, Oct 28
Order within 10 hours and 13 minutes

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At a glance

Condition
New
Size
4"& No Speed Controller
Model
331101-4
Dimensions
4"D x 7"W x 4"H
Weight
1.7 lb
Color
Silver
Material
Metal
In the box
Cord
Warranty
Manufacturer Warranty for 360 days from date of purchase.

Features 6

  • 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: With flexible & mountable design, so 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

Description

4 Inch Inline Fan Inline Booster Duct Fan VIVOSUN M4 Inline Fan VIVOSUN G4-E12 Inline Fan VIVOSUN T4-E12 Inline Fan VIVOSUN G4-E42A+ Fan VIVOSUN T4-E42A+ Fan Who are we? VIVOSUN is the global leader for at-home growing technology & equipment. With over 10 years of demonstrated excellence in the development and production of growing tools,we have established ourselves as a trusted partner for every step in the growing process and for every level of grower. Vivosun's smart grow system enables growers to master the elements for optimal lighting and ventilation to achieve ideal grow results. Indoor gardening can be complex. We simplify it by integrating technology that optimizes light, airflow, and environmental control. Our smart systems make gardening easier, helping both beginners and experts achieve thriving plants effortlessly. Vivosun combines innovation, quality, and sustainability. Our smart products—such as Vgrow, AeroLight, AeroZesh, and GrowHub—streamline gardening with automated controls and energy-efficient features, ensuring better growth outcomes while reducing environmental impact.

Specs 42

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

Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Oct 28

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.

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Top Amazon Reviews


Essential Addition for Better Airflow in Keystone RVs
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. 🌬️🚐❄️ ... show more
Reviewed in the United States on December 20, 2024 by Alexander B.

Quiet exhaust fan
Size: 4"& No Speed Controller
I used this fan along with an old kitchen vent hood to make a ventilation fan for my workshop. It was easy to install inline, and I wired it up to a switched outlet. Now, when I do woodworking or painting in the shop, the dust and fumes are drawn through a common furnace filter and vented outside. Although the volume of air moved is not great, it does help keep the air cleaner, without generating excessive noise. ... show more
Reviewed in the United States on February 19, 2024 by Just Bob from WI

Not strong enough to open my dampers
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

Not too fast but it moves air. I need something much faster but this will work for most people.
Size: 4"& No Speed Controller
Nice fan
Reviewed in the United States on September 16, 2026 by Gregory Madaj

Works well, but only for 150 hours
Size: 4"& No Speed Controller
Not sure how long I should expect this fan to work, but it stopped working after about 150 hours of use. When it was working, it did a great job of moving the air, though.
Reviewed in the United States on August 9, 2026 by Amazon Customer

Would buy again!
Size: 4"& No Speed Controller
Fan is holding up great! Bought it to cool my metal shed, have it on a timer.
Reviewed in the United States on May 18, 2026 by Bob E Hepner

Very disappointed
Size: 4"& No Speed Controller
I would actually give it a no star rating,and not recommend it. The fan is very noisy, sounds like motor is about to conk out,doesn't put a good air flow through,and definitely not worth the money. Don't waste your money. Performance is complete dissatisfaction,along with a slow speed motor about to burn out. ... show more
Reviewed in the United States on October 7, 2026 by italianguy

Great Room Venting for Computer Closet
Size: 4"& No Speed Controller
I have a medium-sized closet (4'X6'x7.5') in my basement where I have my home IT equipment, yeah I am an IT guy with a home lab and a pile of equipment to run my home network and to experiment with. Since moving into my house I've had to keep the door cracked to let the heat out and some cooler air in, close to a 25 Degree (f) difference on either side of the door if it's closed all the way, maybe more on some days. It was a milder version of opening an oven door to open the room door. I installed two of these, one pulling air into the closet (it's open up there) and one pushing air out of the closet. They are separated by 5 feet and blocked from each other by the floor joists above. The intake is near the foundation wall, so benefits from the cooling of being below ground level, and the outlet blows into the unfinished basement. The difference between the inside and outside of the room has dropped nearly 20 degrees (f). I had been concerned that the sound of them might be audible on the floor above, but I can't hear anything, and in general, when passing the room, the sound of the equipment is more than the sound of these fans. Excellent results after a month or so of use. ... show more
Reviewed in the United States on March 21, 2023 by z
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