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iPower 4 Inch Inline Booster Duct Fan 100 CFM HVAC Exhaust Ventilation Blower with Low Noise for Grow Tent, Basements, Bathrooms, Kitchens and Attics

Based on 448 reviews
Condition: New
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$22.99

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Availability: In Stock.
Fulfilled by Amazon

Arrives Tuesday, Nov 3
Order within 13 hours and 32 minutes

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At a glance

Condition
New
Size
4"
Model
4 in Inline Booster Duct
Dimensions
6"D x 5.7"W x 4.7"H
Color
Silver
Electric fan design
Blower
Power Source
Corded Electric
In the box
4 Inch Inline Booster Duct Fan

Features 5

  • Durable: Superior balanced centrifugal impeller and high strength housing for long service life. The motor features a permanently lubricated bearing that operates quietly and requires no maintenance.
  • Efficient but quiet: Lead to great effects with a diameter of 4 inches, speed of 2930 RPM and 100 CFM air flow. A less than 40 dB noise level does not have any harm and will not disturb your work.
  • Easy to install: Portable, lightweight and easy to install in areas with little available space. Sufficient 5.5' grounded power cord inside is convenient to use.
  • Wide application: Exhaust air for HVAC to remove heats & odors or intake fresh air, used in grow tents, kitchens, bathrooms, basements, attics, garage, workshops etc.

Specs 42

Brand iPower
Color Silver
Electric fan design Blower
Power Source Corded Electric
Style 1 Pack New
Product Dimensions 6"D x 5.7"W x 4.7"H
Room Type Bathroom, Kitchen
Special Feature Portable

Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Nov 3

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

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Top Amazon Reviews


High Powered, High Decibel, No Frills Fan
I have rated this fan a 5 on price and value, however if you are considering buying this fan for use in your home or office space then read the whole review because this probably isn't right product for you. This is a great fan for the price, it moves a lot of air for the money, made of quality components for the price, but it is VERY loud. If you are planning to use this inside a living space or office, seriously think twice about your purchase. As soon as I turned it on, I instantly had buyers remorse as it is not for my application. I have it inside a 2' x 4' grow tent in my living room. This thing runs at 48 decibels, and it is comparable to my wife's hair dryer running on medium but with a lower pitch. I have it hooked up to a smart switch and can turn it on from one of the upstairs bedrooms across the house with the door closed and hear it turn on and run. Unfortunately due to the price, it has no speed control so you get all or nothing. If you are planning on using this fan in an attic to boost an HVAC duct, or in an industrial/warehouse setting this would be a perfect fan and I highly recommend it for those applications. But for a grow tent in a living space, I can't recommend it. I can't fault the company for my mistake in buying this fan, the product page clearly states accurate specifications of the fan including the decibel rating, and overall it is a great product for the price. Just not the product I needed, and you might not either. I have ordered a separate AC speed controller and a duct muffler which should reduce the sound by half, but for the cost of all that, I could have gotten an AC Infinity fan that would better suit my needs right out of the box. ... show more
Reviewed in the United States on December 25, 2020 by Myopic Topics

Disassembly reveals: quality fan
Size: 4"
I'm using this 4" inline fan to vent a powder room. As received, it powered on nicely, has a pleasant white noise, moves about 30-40 CFM (compared to a typical 50 CFM ceiling mount blower) and guessing approx 1.0 zone noise level. It had a very slight vibration that wasn't cause for concern but I addressed it anyway. The fan connects perfectly to 4" aluminum ducting. I disassembled it to check it's serviceability, if it should ever need cleaning or bearings serviced. I found the fan blades wobbled +/- 1/8" (3-4mm) from the base plate being deformed during initial installation. They are soft aluminum and can easily be bumped out of place, since they don't have much form to keep them rigid. I spent a little time spinning the fan and adjusting the blades. A marker helped find the high spots, and adjusted with pliers. To balance the fan, I used a patch of duct tape. I moved it to each blade, noting if it increased or decreased the vibration. I then applied a little strip of aluminum tape on the lightest side, and trimmed it till it was reasonably balanced. Digging deeper, I discovered it has ball bearings, which should last longer than sleeve bearings, but depends on the quality of the ones installed. There's a slight coarseness to them, but only if your ear is right on it. Personally, I like that I can replace these bearings when they go out instead of replacing the whole motor assembly. Overall it's a decent fan as shipped, perhaps a little ambitious with it's CFM rating, but it does rotate slower thus giving a more pleasant sound. ... show more
Reviewed in the United States on December 29, 2023 by sumbum

Doesn't seem to be moving alot of air. It does blow but not as strong as expected
Size: 4"
Well made fan but doesn't move as much air as I expected
Reviewed in the United States on September 15, 2026 by Ryan T.

Good but not quiet.
Size: 8 inch fan
A bit loud for a kitchen or bath vent fan, but works well.
Reviewed in the United States on April 23, 2025 by Andy G.

If I need more will more then like pick this brand again!
Size: 4"
Well made, it sucks out the hot air in a shed I pershased very well! I feel it will last! It comes on in the hottest part of the day.
Reviewed in the United States on April 6, 2026 by Bob E Hepner

WORKS!
Size: 4"
Really nice fan for the money.
Reviewed in the United States on July 17, 2026 by phester dirb

Simpl quaity procut with versatile applications
Size: 4 inch fan
I've used one for a vent fan right behind a hotplate in an efficiency kitchen and one is a conventional laundry room. Dryer heat rises, fills the room and traditional ceiling exhaust vents it after it fills the room. I installed this just above the dryer and it immediately catches the excess heat and vents it in a straight line right out through a six-inch wall. Slick! ... show more
Reviewed in the United States on October 21, 2025 by R.S. Tucson

Does Nothing To Help Flow
Size: 4"
Review for: iPower 4 Inch Inline Booster Duct Fan 100 CFM HVAC Exhaust Ventilation Blower with Low Noise for Grow Tent, Basements, Bathrooms, Kitchens and Attics Looks like a decent quality fan. I purchased this to boost a 30 foot run of 4 inch flex duct. It needed just a bit more air flow. I noticed no perceptible difference in the air flow. Not impressed. EDIT: I obtained a manometer and used it to test this fan. I see zero boost in air pressure. No boost to negative pressure on the intake side of the fan, no indication of positive pressure on the output side of the fan. Tried the fan without the main fan running, there was zero indication with the manometer on either side of the fan. My rating went from 3 stars to 1 star. Wish it was better but it is not. I will be removing the fan since all I notice is it blocking flow in the pipe. ... show more
Reviewed in the United States on September 29, 2024 by #
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