---
product_id: 506793367
title: "Duct Adapter, 150mm to 100mm Ducting Reducer Increaser Cone for Grow Tent Bathroom Kitchen Ventilation Systems, 6\" to 4\""
brand: "ac infinity"
price: "R974"
currency: ZAR
in_stock: true
reviews_count: 5
category: "Ac Infinity"
url: https://www.desertcart.co.za/products/506793367-duct-adapter-150mm-to-100mm-ducting-reducer-increaser-cone-grow
store_origin: ZA
region: South Africa
---

# 6" to 4" duct size adapter High-temp zinc coating finish Galvanized steel corrosion-resistant body Duct Adapter, 150mm to 100mm Ducting Reducer Increaser Cone for Grow Tent Bathroom Kitchen Ventilation Systems, 6" to 4"

**Brand:** ac infinity
**Price:** R974
**Availability:** ✅ In Stock

## Summary

> 🔧 Upgrade your airflow game — connect with confidence!

## Quick Answers

- **What is this?** Duct Adapter, 150mm to 100mm Ducting Reducer Increaser Cone for Grow Tent Bathroom Kitchen Ventilation Systems, 6" to 4" by ac infinity
- **How much does it cost?** R974 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/506793367-duct-adapter-150mm-to-100mm-ducting-reducer-increaser-cone-grow)

## 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

- • **Seamless Airflow Connection:** Maintain peak ventilation efficiency by bridging different duct sizes without airflow loss.
- • **Compact & Lightweight Design:** At just over 5 inches and 340g, it’s easy to install without bulk or hassle.
- • **Rugged Galvanized Steel Build:** Durable, corrosion-resistant construction designed to withstand high temperatures and daily wear.
- • **Versatile Ventilation Solution:** Perfect for grow tents, bathroom fans, dust collectors, and kitchen range hoods—adapt with confidence.
- • **Precision Fit with Raised Lip Grip:** Enhanced grip on smaller ducts ensures a secure, no-slip connection every time.

## Overview

The AC Infinity Duct Adapter efficiently adapts 6-inch ducting to 4-inch openings, crafted from galvanized steel with a zinc coating for corrosion and heat resistance. Its raised lip design ensures a secure fit, making it ideal for grow tents, bathroom fans, dust collectors, and kitchen ventilation systems. Lightweight and compact, it preserves airflow efficiency while providing a durable, professional-grade solution for diverse ducting needs.

## Description

A ducting cone designed for adapting ductwork to equipment like bathroom fans and dust collectors. Maintains airflow efficiency by creating a seamless connection between two different sized duct openings. Raised lips on the smaller opening for extra grip on ducting or your equipment’s duct opening. Galvanized steel body that is corrosion-resistant and can withstand high temperatures. Adapts 6 inches to 4 inches | Product Length: 5.11 inches | Finish: Zinc Coating Product Description A ventilation ducting tool designed to fit different-sized duct hole openings together, connecting smaller ducting to bigger fans and vice versa. Using this duct adapter to connect your ventilation fans to your ducting will help retain your system’s CFM efficiency. It features a raised lip on the reducer end to provide extra grip on ducting or duct openings, while the increaser end features a flat brim to achieve a flush fit. The galvanized steel body is finished with a zinc coating that aids in its resistance to corrosion and high temperatures. Applications The duct adapter is a versatile tool that can be retrofitted with a variety of different-sized ducting and fans. It is commonly paired with bathroom exhaust fans and dust collection units to adapt them to smaller ductwork as a reducer. Other adaptation projects include range hoods, tumble dryers, grow tent ventilation systems, and connecting smaller ducts to bigger ducts. Product Identification Manufacturer AC Infinity Inc. Product Name Duct Reducer 6" to 4" Adapter Product Model AC-SDR64 UPC Code 819137021334 Product and Mounting Dimensions Duct Opening Sizes 6" to 4" Product Length 5.11 in. (13.0 cm) Product Performance and Technical Specs Construction Galvanized Steel Color Metallic Silver Finish Zinc Coating

Review: Fits well, does the job it has to do. Sturdy metal.
Review: Got this for my GF... Glowforge, not girlfriend. While it's not an exact tight fit with the tubing for the external fan (also bought separate) If you throw some tape on there it works great. And MUCH cheaper than those that are made specifically for the external fan.

## Features

- A ducting cone designed for adapting ductwork to equipment like bathroom fans and dust collectors.
- Maintains airflow efficiency by creating a connection between two different sized duct openings.
- Raised lips on the smaller opening for extra grip on ducting or your equipment's duct opening.
- Galvanized steel body that is corrosion-resistant and can withstand high temperatures.
- Adapts 6 inches to 4 inches | Product Length: 5 inches | Finish: Zinc Coating

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0842XMBYC |
| Batteries Required? | No |
| Batteries included? | No |
| Best Sellers Rank | 43,905 in DIY & Tools ( See Top 100 in DIY & Tools ) 125 in Ducting |
| Colour | Black |
| Customer Reviews | 4.5 4.5 out of 5 stars (1,167) |
| Date First Available | 3 Oct. 2022 |
| Item Package Quantity | 1 |
| Item Weight | 340 g |
| Item model number | AC-SDR64 |
| Manufacturer | AC Infinity |
| Material | Galvanized Steel |
| Number of Pieces | 1 |
| Package Dimensions | 17.3 x 16.99 x 16.79 cm; 340 g |
| Part Number | AC-SDR64 |
| Size | 6 Zoll bis 4 Zoll |

## Product Details

- **Brand:** AC Infinity
- **Colour:** Black
- **Connector type:** Adapter
- **Exterior finish:** Zinc
- **Item weight:** 0.34 Kilograms
- **Manufacturer:** AC Infinity
- **Material:** Galvanized Steel
- **Number of pieces:** 1
- **Size:** 6 Zoll bis 4 Zoll
- **Thread type:** UN

## Images

![Duct Adapter, 150mm to 100mm Ducting Reducer Increaser Cone for Grow Tent Bathroom Kitchen Ventilation Systems, 6" to 4" - Image 1](https://m.media-amazon.com/images/I/41SUtiulYQS.jpg)

## Questions & Answers

**Q: Won't this hurt cfm's?**
A: I used this for my smoker shed, so not sure about the cfm's

**Q: How does this effect the rated CFM?**
A: CFM is a measure of volume over time.  
Any time the output is restricted (say 6" down to 4") you can expect a back pressure and a REDUCTION in CFM, even if there is an increase in velocity (speed) of the airflow.  Opening back up this restriction (4" up to 6") will not necessarily increase your CFM, it just decreases the velocity of the airflow and is less restrictive.  It is not possible to increase CFM in this manner, without the introduction of another fan beyond the initial restriction.

**Q: can this be used for stove piping? what is the gauge of the metal?**
A: No it's not stove pipe

**Q: Is this a solid 1 piece Construction?**
A: Yes. Very solid and sturdy.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by P***O on 6 March 2025*

Fits well, does the job it has to do. Sturdy metal.

### ⭐⭐⭐⭐⭐ Review
*by K***N on 1 August 2022*

Got this for my GF... Glowforge, not girlfriend. While it's not an exact tight fit with the tubing for the external fan (also bought separate) If you throw some tape on there it works great. And MUCH cheaper than those that are made specifically for the external fan.

### ⭐⭐⭐⭐ Review
*by T***T on 29 December 2023*

Works as it should

## Frequently Bought Together

- AC Infinity Duct Adapter, 6” to 4” Ducting Reducer Increaser Cone for Grow Tent Bathroom Kitchen Ventilation Systems
- AC Infinity CLOUDLINE PRO S6, Quiet 6” Inline Duct Fan with Speed Controller - EC Motor Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics

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**Shop now:** [https://www.desertcart.co.za/products/506793367-duct-adapter-150mm-to-100mm-ducting-reducer-increaser-cone-grow](https://www.desertcart.co.za/products/506793367-duct-adapter-150mm-to-100mm-ducting-reducer-increaser-cone-grow)

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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-01-31*