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AC Infinity

AC Infinity Inline Duct Fan Silencer, 4" Noise Reduction Muffler Blower Silencer for Indoor Hydroponics Grow Tent Ventilation Systems

    • Based on 592 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Wednesday, May 7
Order within 3 hours and 52 minutes
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Size: 4-Inch


Features

  • A duct muffler designed for use with inline fans in grow tents, bathroom fans and other HVAC applications.
  • Features dual aluminum flanges to help absorb sound waves from fan vibrations and airflow.
  • High-quality neoprene foam in an egg crate pattern that will reduce fan noise by up to 50%.
  • Galvanized steel body that is corrosion-resistant and can withstand extreme temperatures.
  • Duct Opening Diameter: 4 inches | Length: 15 inches | Weight: 2.30 pounds

Brand: AC Infinity


Item Weight: 2.3 Pounds


Item Form: Ducting


Coverage: 5


Package Dimensions: 16.5 x 9 x 8.8 inches


Item Weight: 2.3 pounds


Manufacturer: AC Infinity


Country of Origin: China


Item model number: AC-DSA4


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, May 7

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

    • Highly effective (don’t use duct tape)
Size: 8-Inch
Review Image by scuba steve scuba steve
I’m using this for residential crypto mining with an 8 inch S8 fan. It is crazy loud, but still quieter than the fans on the mining ASIC. Before buying this, it was just too loud to run at night, costing me income. The fan needs to be at least on level 8 during the day to cool the hash boards, and that is really loud in a residential area. For grow tents, you probably won’t need to run it at level 8 unless you need a jet intake in your tent for some reason. This is perfect. It is so effective that I can run the fan at 7, maybe 8, even at night. It also doesn’t restrict the air flow much at all, and temperatures are not affected. I have an 8 inch duct filter on the end, and it’s even more quiet. Oh yeah, and don’t use duct tape. It defeats the purpose a little since sound will get through the joints. AC Infinity sells 8 inch silencer clamps which is a tube of thick rubber and a clamp at each end. Not only is this more secure and cuts down on sound, but they make your setup look really clean. Another clamp was needed for my filter, just fyi. Note: if you really want this in silver, you may need to request it. Mine came in black, but still looks great. ... show more
Reviewed in the United States on November 1, 2023 by scuba steve scuba steve
    • Good product
Size: 8-Inch
Good for noise reduction
Reviewed in the United States on March 5, 2024 by Tomaz
    • It's works .
Size: 4-Inch
It quiets the fan noise quite substatialy . The air movement noise is quieted as well . I used this on the intake side of the fan , and it has exceeded my expectations .
Reviewed in the United States on March 12, 2024 by Tyler
    • Does a great job, but there is a noisy range that still gets through
Size: 4-Inch
I used this to muffle the AC Infinity inline fan I put in my A/V closet for my home theater. It does an excellent job of reducing the noise - probably by about 50%. Unfortunately, there is still a range where the fan emits a high pitched whine that still comes through - for me, that is around settings 4 and 5. Below or above those settings, it is pretty quiet. I just adjusted the temperature range for the fan to ramp up to help keep it out of those zones as long as possible. ... show more
Reviewed in the United States on March 25, 2022 by badandyhtc
    • About a 50% decrease in sound.
Size: 8-Inch
I rigged this up to a 10in fan with a 10in-8in reducer, still works great. The silencer is very well built and has the cut the noise from the fan by about 50%. Good product, would recommend. Another thing to keep in mind with reducing sound is keeping turns in the ducting soft and trying to avoid 90° turns. ... show more
Reviewed in the United States on March 20, 2024 by Jay
    • It Works!
Size: 4-Inch
I installed a 4 inch inline bath fan that really moves the air but the whine of the fan totally irritated me. I am impressed how well this duct muffler works for my situation, much quieter now.
Reviewed in the United States on February 2, 2024 by S. C. Biber
    • Does what it says, poor execution of details, non-discreet packaging
Size: 4-Inch
The product does what it says, reduces air flow noise from/through ducting. Don't expect it to reduce noise from a fan itself (motor noise). Like others have stated, my product came with dents. That dispute any poster's comments regarding these products being "well packaged." Maybe the others are, but this one isn't. There is foam in the box on the top and bottom of the device, but none on the sides at all. Any impact or pressure on the sides of the box will dent the product. Get on that AC Infinity, should know better by now. And on packaging, this product DOES come with labels on the outside clearly stating what it is. If you live somewhere that discreet packaging is important, this can be a big issue. Get on that AC Infinity, should know better by now. These are simple fixes. ... show more
Reviewed in the United States on October 19, 2021 by Jordan
    • Works well.
Size: 6-Inch
I used this to try and quiet the “whisper quiet” AC infinity fan I got for a cigar room. It was not whisper quiet. This did quiet everything down a bit. Satisfied with its reduction but still not happy about the noise level.
Reviewed in the United States on November 16, 2023 by Robert Dragolic

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