does this get installed before the fane for after the Fan and how far?

I've installed one before and one after - directly on the fan. I ultimately returned the one before the fan because the improvement was relatively minor.

Can you connect these mufflers in series? And what impact does that have? e.g. one reduces 50% two reduces 75% ... and so forth?

I don’t think they can be used end to end but you can put one on either side of the fan and that should reduce the sound.... or if you’d like you can put one directly against the fan and then add another one at the end of a duct as well. I can’t give you any specific numbers though.

Can I simple insert this silencer (not fan) before my output in my home music studio?

The openings on each side is 4" in diameter. I'm not sure exactly what your affixing this to but if it's similar to any duct opening you'll need a clamp or coupler. Hope this helps!

Will this work on a radon fan system?

i dont know about a radon but ive used a hyperfan and it fits perfect. ive also used one of those cheap vivosun ones with the red fan blades and it is about a quarter inch smaller than the flange on th muffler. it does work well though.

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

Product ID: 256031722

Details

Brand
AC Infinity
Configuration
Dual/Dual
Item weight
2.3 Pounds
Material
Neoprene
Shape
Round

📏4-inch duct diameter

🔇50% noise reduction

🛡️corrosion-resistant steel body

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€ 170.75

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Sold byAmazon CroatiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔇 Silence your space, amplify your focus.

SEAMLESS FIT - Dual aluminum flanges absorb vibrations and ensure easy installation.
BUILT TO LAST - Durable galvanized steel withstands extreme temps and corrosion.
VERSATILE APPLICATION - Perfect for hydroponics, HVAC, AV rooms, and bathroom vents.
WHISPER QUIET VENTILATION - Cut fan noise by up to 50% with advanced neoprene foam tech.
MAX AIRFLOW MINIMAL DISTRACTION - Egg crate foam muffles sound without compromising airflow.

The AC Infinity Inline Duct Fan Silencer is a premium 4-inch muffler designed to reduce ventilation noise by up to 50% using high-grade neoprene foam and dual aluminum flanges. Its corrosion-resistant galvanized steel body ensures durability under extreme conditions, making it ideal for hydroponic grow tents, HVAC systems, and quiet home or office environments.

Specifications

ASIN	B0829GJ5Q7
Best Sellers Rank	#79,350 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #95 in Heating & Cooling Ducting Products
Brand Name	AC Infinity
Configuration	Dual/Dual
Customer Reviews	4.6 4.6 out of 5 stars (375)
Global Trade Identification Number	00819137021051
Item Weight	2.3 Pounds
Manufacturer	AC INFINITY
Manufacturer Part Number	AC-DSA4
Material Type	Neoprene
Model Number	AC-DSA4
Shape	Round
UPC	819137021051
Unit Count	1.0 Count

Reviews

R**S

Definitely makes it a bit quieter

22.10.2025

T**I

Der Rohrschalldämpfer ist von hoher Qualität und senkt den Geräuschpegel merklich ab - geschätzt 25 % weniger - er macht also was er soll, daher eine klare Kaufempfehlung von mir 👍

18.10.2025

S**U

As described prompt post well securely packed would buy from again

21.09.2022

R**U

Ok 👍

5.02.2026

T**L

Bra kvalité allt testat och allt fungerar som förväntat

27.06.2025

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€ 170.75

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In stock

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