AC Infinity Inline Duct Fan Silencer, 6" Noise Reduction Muffler Blower Silencer for Indoor Hydroponics Grow Tent Ventilation Systems
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Availability:
Only 2 left in stock, order soon!
Arrives
Thursday, Dec 4
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Size: 6"
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: 6 inches | Length: 20 inches | Weight: 3.90 pounds
Brand: AC Infinity
Shape: Round
UPC:
Manufacturer: AC Infinity
Global Trade Identification Number: 68
Package Dimensions : 17.7 x 10.3 x 10.1 inches; 4.4 Pounds
Item model number : AC-DSA6
Date First Available : December 24, 2019
Manufacturer : AC Infinity
Best Sellers Rank: #38,038 in Patio, Lawn & Garden (See Top 100 in Patio, Lawn & Garden) #23 in Greenhouse Ventilation Equipment
#23 in Greenhouse Ventilation Equipment:
Customer Reviews: 4.5 4.5 out of 5 stars 707 ratings
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Thursday, Dec 4
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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Similar Products
Top Amazon Reviews
Size: 6"
We had a booster fan added to our house HVAC system, to move more air into the back of the house. The booster fan was super loud coming out of the vent in our bedroom. The HVAC contractor offered to replace our rigid duct with flexible, which supposedly reduces noise. I also bought this and asked the guys to install it while they replaced the duct. The final result: almost completely silent, but we still get lots of air. I'm not sure if it was the flex duct, this, or both, but I'm willing to give this credit.
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Reviewed in the United States on August 20, 2025 by jingles
Size: 4"
Purchased for a fairly novel use: ventilation for a Whisper Room isolation booth. I am a professional audiobook narrator and require a very low noise floor. Unfortunately, in the past, I've been relegated to quiet computer fans, which simply do not replace enough air in a small space that I spend hours in at a stretch. This fan has been a game changer. With the old computer fan system, I'd end the work day partially asphyxiated - literally. Overly tired, light-headed and confused. Not good! Changing to this fan, I'm probably replacing the air in the booth several times per hour, meaning everything about my performance has drastically improved. The best thing? I can't hear the fan *at all*, and neither can my audio equipment. My noise floor is -72dB with this fan on the fourth setting. Over all, I couldn't be happier.
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Reviewed in the United States on September 19, 2025 by Charles J. Winston
Size: 4"
Easy to install and instantly quieter.
Reviewed in the United States on August 18, 2025 by Ethan
Size: 8"
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.
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Reviewed in the United States on November 1, 2023 by scuba steve scuba steve
Size: 4"
I had wondered when the description said it "will reduce fan noise by up to 50%" whether this meant the sound power was reduced by 50%, a 3-dB reduction in power, which would be hardly noticiable, or it it meant the apparent sound was cut in half, which is more like a 10-dB reduction in sound power (hearing is non-linear). I can report that it appears to be more like the latter, since the noise reduction is significant.
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Reviewed in the United States on October 21, 2024 by Rick
Size: 4"
What's that noise is not what you're going to say after installing a silencer on both ends of your inline. Coupled with noise reduction clamps to have you trying to figure out if you're hearing the inline or the clip on AC Infinity Cloudrays. Easy to install, nice snug fit with the AC Infinity noise reduction clamps, heavy duty feel with the performance and luxurious look of AC Infinity products. Recommended for those that want a quiter growing experience.
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Reviewed in the United States on May 20, 2024 by Jason Maxey Jason Maxey
Size: 4"
Everything we have bought from AC Infinity works well and is high quality. They also have very good customer service. We do not hesitate when it comes to purchasing their products.
Reviewed in the United States on February 3, 2025 by Michele
Size: 8"
I was able to hear my 8" carbon scrubber running upstairs from my downstairs grow, definitely annoying. I'm not one that likes constant humming noises or resonating noises. I ordered this thinking it'd be alright.. This thing literally worked and I have the same performance on my system with no noise upstairs anymore, at all.. Definitely if you're going for stealth & calm consider getting one or more of these in your system. Especially if you're running an "open scrubber" setup where its just an inline fan sitting on a carbon filter like me. You put this on the top of the inline fan thats on the carbon filter and it makes it wayyy quieter. Different fans vary in how quiet they get though like the hyperfan I have is plastic sooo it makes noise itself but the actual fan noise is non existent upstairs anymore. Not going to lie the metal on the unit is kinda weak and came dented in, it didn't effect function, only kinda annoying to look at.. But ¯\_(ツ)_/¯ what can ya do I don't have time to deal with customer support and returns all that shenanigans over $65.
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Reviewed in the United States on May 7, 2021 by C