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, 150mm Noise Reduction Muffler Blower

Product ID: 464967529

Details

Brand
AC Infinity
Inlet connection size
6 Inches
Item weight
2 Kilograms
Material
Aluminium
Shape
Oval

🔇50% noise reduction

🔥Corrosion & heat resistant steel

🛠️Dual aluminum flanges

€ 156.05

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Sold byAmazon BelgiumDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔇 Silence is the new power move.

BUILT TO LAST - Galvanized steel body resists corrosion and extreme temps, ensuring durability in any HVAC setup.
VERSATILE APPLICATION - Perfect for grow tents, bathroom fans, and hydroponic ventilation—upgrade your environment effortlessly.
PRO LEVEL AIRFLOW BALANCE - Optimized design reduces noise with minimal airflow loss (~10%), keeping your system efficient and quiet.
WHISPER QUIET PERFORMANCE - Slash fan noise by up to 50% with advanced neoprene foam tech—because your space deserves peace.
PRECISION FIT WITH A TWIST - 6-inch duct openings with dual aluminum flanges absorb vibrations, delivering smoother airflow and less noise.

The AC Infinity Inline Duct Fan Silencer is a premium 6-inch muffler designed to cut fan noise by up to 50% using egg crate neoprene foam and dual aluminum flanges. Its galvanized steel construction withstands corrosion and extreme temperatures, making it ideal for hydroponic grow tents, bathroom fans, and HVAC systems. While it slightly reduces airflow by about 10%, it delivers a quieter, more efficient ventilation experience favored by professionals.

Specifications

ASIN	B0829F2VXP
Best Sellers Rank	94,230 in Garden ( See Top 100 in Garden ) 63 in Hydroponic Ventilation Equipment
Brand Name	AC Infinity
Country Of Origin	China
Customer Reviews	4.5 4.5 out of 5 stars (527)
Global Trade Identification Number	00819137021068
Inlet Connection Size	6 Inches
Item Highlight	Silencer for Indoor Hydroponics Grow Tent Ventilation Systems, 6-Inch
Item Shape	Oval
Item Weight	2 Kilograms
Manufacturer	AC Infinity
Manufacturer Part Number	AC-DSA6
Material Type	Aluminium
Model Number	AC-DSA6
Number of Items	1
Outlet Connection Size	6 Inches
UPC	819137021068
Unit Count	1.0 count

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€ 156.05

Duties & taxes included

In stock

Sold byAmazon BelgiumDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Belgium.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ravi S.

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2 months ago

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