What would be the equivalent ventilation area with all the foam inserts removed for the 125mm diameter i.e. would it be 4400mm2?

MsCabbage,thanks for your question. The equivalent ventilation area with all of the foam inserts removed would be 5600mm², so 700mm² per foam inserts. You made a pretty good calcuation with 4400m².We wish you a wonderful day!Klimaparter

If using several of these in the same duct is the equivalent ventilation area still 700mm2 per piece removed?

MsCabbage,thanks again for your question. Yes, as long as the holes are perfectly aligned with another, the equivalent ventilation area is still 700mm². Please be careful when putting them in back to back.happy silencing,Klimapartner

Hi, would this be suitable for a portable air con vent hose to reduce the exhaust noise outside?

Thank you for your question. Yes, these sound absorbing devices will reduce all noises regardless where the foam is inserted. If you have any further questions, please do not hesitate to ask. Sincerely Klimpartner

Is this product available for 150mm ducts?

You can not use this ESD 100 because it is suitable for DN 100 pipes. Since there are none in DN 150, you would need to use DN 160 and adapt it to DN 150.

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neverest® ESD 80mm in-line Duct Sound Absorbing Tool Sound Insulation

Product ID: 60240564

Details

Brand
neverest
Colour
Black/White
Connector type
Coupling
Exterior finish
Foam Coated
Item dimensions L x W x H
7.6 x 7.6 x
Item weight
32 Grams

🔇80mm duct fit for seamless integration

🧽Polyurethane foam for superior sound absorption

🛠️50mm depth for easy retrofit installation

R773

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Description

🔇 Silence your space, amplify your focus.

TRUSTED EXPERTISE - Backed by 40+ years in ventilation innovation, ensuring reliable performance and support.
MODULAR SILENCING POWER - Stack multiple dampers to customize noise control exactly where you need it.
VERSATILE COMPATIBILITY - Perfectly sized for DN 80mm ducts, ideal for retrofitting existing ventilation systems.
WHISPER QUIET VENTILATION - Slash disruptive noise with advanced foam tech designed for busy homes and offices.
EFFORTLESS DIY INSTALLATION - No pro needed—just prep holes and slide in for instant sound relief.

The neverest® ESD 80mm In-line Duct Silencer is a lightweight, polyurethane foam sound absorber designed to fit DN 80mm ventilation ducts with a 50mm depth. It offers an affordable, easy-to-install solution to reduce noise from road and wind interference in residential, office, and industrial environments. Its modular design allows multiple units to be combined for enhanced sound insulation, backed by over four decades of ventilation expertise.

Specifications

ASIN	B0133GQJFC
Best Sellers Rank	54,988 in DIY & Tools ( See Top 100 in DIY & Tools ) 153 in Ducting
Brand	neverest
Colour	Black/White
Connector Type	Coupling
Country of Origin	China
Customer Reviews	4.1 4.1 out of 5 stars (970)
Exterior Finish	Foam Coated
Item Dimensions	7.6 x 7.6 x 5.1 centimetres
Item Highlight	Duct Sound Absorbing Tool Sound Insulation Silencer for Round Ventilation Pipes
Item Weight	32 Grams
Manufacturer	neverest
Material	Foam
Model Number	80mm
Number of Packs	1
Number of Pieces	1
Part Number	4054503008182
Size	80mm
Thread Type	NPT
Unit Count	1.0 count

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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R773

Duties & taxes included

In stock

Sold byAmazon South AfricaDelivered 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 South Africa.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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