---
product_id: 177166705
title: "AC Infinity Inline Duct Fan Silencer, 4\" Noise Reduction Muffler Blower Silencer for Indoor Hydroponics Grow Tent Ventilation Systems"
brand: "ac infinity"
price: "R2898"
currency: ZAR
in_stock: true
reviews_count: 13
category: "Ac Infinity"
url: https://www.desertcart.co.za/products/177166705-ac-infinity-inline-duct-fan-silencer-4-noise-reduction-muffler
store_origin: ZA
region: South Africa
---

# 50% noise reduction corrosion-resistant steel dual aluminum flanges AC Infinity Inline Duct Fan Silencer, 4" Noise Reduction Muffler Blower Silencer for Indoor Hydroponics Grow Tent Ventilation Systems

**Brand:** ac infinity
**Price:** R2898
**Availability:** ✅ In Stock

## Summary

> 🔇 Silence your space, amplify your focus.

## Quick Answers

- **What is this?** AC Infinity Inline Duct Fan Silencer, 4" Noise Reduction Muffler Blower Silencer for Indoor Hydroponics Grow Tent Ventilation Systems by ac infinity
- **How much does it cost?** R2898 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/177166705-ac-infinity-inline-duct-fan-silencer-4-noise-reduction-muffler)

## Best For

- ac infinity enthusiasts

## Why This Product

- Trusted ac infinity brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Durable Build:** Galvanized steel body resists corrosion and extreme temperatures.
- • **Precision Fit:** 4-inch duct opening ensures seamless integration with your ventilation system.
- • **Easy Installation:** Lightweight 2.3 lbs design makes setup quick and hassle-free.
- • **Vibration Absorption:** Dual aluminum flanges effectively dampen fan vibrations and airflow noise.
- • **Whisper-Quiet Performance:** Slash fan noise by up to 50% for a peaceful environment.

## Overview

The AC Infinity Inline Duct Fan Silencer is a 4-inch noise reduction muffler designed for indoor hydroponics, grow tents, and HVAC systems. Featuring dual aluminum flanges and high-quality neoprene foam in an egg crate pattern, it reduces fan noise by up to 50%. Its galvanized steel body offers corrosion resistance and durability under extreme temperatures, making it a reliable solution for quieter ventilation.

## Description

Buy AC Infinity Inline Duct Fan Silencer, 4" Noise Reduction Muffler Blower Silencer for Indoor Hydroponics Grow Tent Ventilation Systems: Industrial & Scientific - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Reduced noise from HVAC fan and return vent - Made a difference in the noise from our HVAC. The unit and a return is right behind our TV room and we could hear the fan running - I put this in the line between the HVAC unit and the return grate in the room and it made a noticeable difference to me. Installation was very easy if you know what you are doing.
Review: Does exactly what it says, silences. It doesn't blow or suck, pun intended. - Really does drop the noise by A LOT. your mileage may vary, but I had it installed on the intake before the fan as an exhaust and full speed doesn't feel like I'm next to a wind tunnel, it sounds about the same as a small desk fan. No one posted a video of the difference, so I'll include one. Sound also appears to be very quiet on the downstream near the exhaust.

## 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

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0829GJ5Q7 |
| Best Sellers Rank | #27,311 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #18 in Greenhouse Ventilation Equipment |
| Date First Available | December 24, 2019 |
| Department | All Ages / Unisex |
| Item Weight | 2.3 pounds |
| Item model number | AC-DSA4 |
| Manufacturer | AC Infinity |
| Package Dimensions | 16.22 x 7.72 x 7.72 inches |

## Product Details

- **Brand:** AC Infinity
- **Global Trade Identification Number:** 00819137021051
- **Item Weight:** 2.3 Pounds
- **Manufacturer:** AC Infinity
- **UPC:** 819137021051

## Images

![AC Infinity Inline Duct Fan Silencer, 4" Noise Reduction Muffler Blower Silencer for Indoor Hydroponics Grow Tent Ventilation Systems - Image 1](https://m.media-amazon.com/images/I/51AYf5JWdAL.jpg)

## Questions & Answers

**Q: does this get installed before the fane for after the Fan and how far?**
A: 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.

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

**Q: Can I simple insert this silencer (not fan) before my output in my home music studio?**
A: 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!

**Q: Will this work on a radon fan system?**
A: 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.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Reduced noise from HVAC fan and return vent
*by H***B on January 15, 2026*

Made a difference in the noise from our HVAC. The unit and a return is right behind our TV room and we could hear the fan running - I put this in the line between the HVAC unit and the return grate in the room and it made a noticeable difference to me. Installation was very easy if you know what you are doing.

### ⭐⭐⭐⭐⭐ Does exactly what it says, silences. It doesn't blow or suck, pun intended.
*by J***S on November 17, 2025*

Really does drop the noise by A LOT. your mileage may vary, but I had it installed on the intake before the fan as an exhaust and full speed doesn't feel like I'm next to a wind tunnel, it sounds about the same as a small desk fan. No one posted a video of the difference, so I'll include one. Sound also appears to be very quiet on the downstream near the exhaust.

### ⭐⭐⭐⭐⭐ Highly effective (don’t use duct tape)
*by S***E on November 1, 2023*

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.

## Frequently Bought Together

- AC Infinity Inline Duct Fan Silencer, 4" Noise Reduction Muffler Blower Silencer for Indoor Hydroponics Grow Tent Ventilation Systems
- AC Infinity Noise Reduction Clamp 4-Inch, Duct Coupler with Stainless Steel Clamps, Flexible Rubber Coupling for Inline Fans and Carbon Filters in Growing and HVAC
- AC Infinity CLOUDLINE PRO T4, Quiet 4” Inline Duct Fan with Temperature Humidity VPD Controller, WiFi Integrated App Control - Ventilation Exhaust Fan for Heating Cooling, Grow Tents, Hydroponics

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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-03-10*