---
product_id: 72686694
title: "Kair Ducting Adaptor 220mm x 90mm to 150mm - 6 inch Rectangular to Round Straight Channel Connector for Converting to Different Size Duct Systems"
brand: "kair"
price: "$114"
currency: NZD
in_stock: true
reviews_count: 13
category: "Kair"
url: https://www.desertcart.nz/products/72686694-kair-ducting-adaptor-220mm-x-90mm-to-150mm-6-inch
store_origin: NZ
region: New Zealand
---

# 150mm round spigot 220mm x 90mm rectangular fit Low static pressure drop Kair Ducting Adaptor 220mm x 90mm to 150mm - 6 inch Rectangular to Round Straight Channel Connector for Converting to Different Size Duct Systems

**Brand:** kair
**Price:** $114
**Availability:** ✅ In Stock

## Summary

> 🔄 Convert with Confidence: The Ultimate Ducting Adaptor for Next-Level Airflow

## Quick Answers

- **What is this?** Kair Ducting Adaptor 220mm x 90mm to 150mm - 6 inch Rectangular to Round Straight Channel Connector for Converting to Different Size Duct Systems by kair
- **How much does it cost?** $114 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/72686694-kair-ducting-adaptor-220mm-x-90mm-to-150mm-6-inch)

## Best For

- kair enthusiasts

## Why This Product

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

## Key Features

- • **Pro-Grade Airflow:** Independently tested low static pressure drop ensures efficient ventilation and quieter operation.
- • **Space-Smart Design:** Compact, flat-bottomed adaptor ideal for tight installations—no more awkward water traps or wasted space.
- • **Durable UK-Made Build:** Crafted from premium polystyrene/polypropylene for long-lasting performance in any HVAC setup.
- • **Plug & Play Installation:** Push-fit design means quick, tool-free setup—perfect for busy pros and savvy DIYers alike.
- • **Seamless Size Conversion:** Effortlessly switch between 220x90mm rectangular and 150mm round ducts for ultimate system flexibility.

## Overview

The Kair Ducting Adaptor 220mm x 90mm to 150mm is a high-quality, UK-made connector designed to convert rectangular ducting to round duct systems seamlessly. Featuring a flat-bottomed rectangular end and a 150mm round spigot, it offers space-saving installation and superior airflow performance with low static pressure drop. Compatible with a wide range of Kair ducting products, it’s ideal for HVAC, kitchen, bathroom, and whole-house ventilation projects, delivering durable, easy push-fit installation and compliance with Part F Building Regulations.

## Description

Kair Ducting Adaptor 220mm x 90mm to 150mm - 6 inch Rectangular to Round Straight Channel Connector RECTANGULAR 220mm x 90mm The flat end is a female spigot and fits over 220mm x 90mm Rectangular Duct Pipe Part: DUCVKC5704 or flexible hose Part: DUCR3M/220/90. ROUND 150mm /6 inch Circular end is a 150mm round male spigot that that fits inside 150mm round duct pipe Part: DUCVKC670 or flexible hose Part: DUCP0092/152/35. Allows you to convert between round and rectangular ducting systems.Made in the UK using high-quality Polystyrene/Polypropylene plastic.Max / Min Temperature: +60c / -15c.Easy to install and durable, just push-fit duct and fittings together. For permanent fixings, seal joints with silicone sealant or tape.Airflow performance independently tested by BSRIA or BRE.Suitable to use in compliance with Part F Building Regulations.Static pressure drop in pascals (Pa): 60 l/s = 1.7 Pa 120 l/s = 5.4 Pa 180 l/s = 10.8 PaPerfectly suited for ducting your Bathroom or Kitchen extractor fan, hydroponics, in-line extract Fans, tumble dryer, or cooker hood. This item can be used as a part of a long ductwork run for a variety of purposes including whole house ventilation, passive stack vent, positive input ventilation, air conditioning, HVAC, and Heat Recovery systems. Kair plastic rigid ducting is perfect for DIY and Trade use and provides superior airflow performance and durability versus flexible duct.

Review: Dutch Adaptor - Nice product
Review: Flat bottom design. - Great for joining round to flat pipe. Nice to have a flat bottom, most others had the conversion of round to rectangular in the middle, so if you needed the rectangular part to be horizontal (I did) then the design traps water. This connector solves the issue by having the rectangular part at the bottom water flows straight through from round to rectangular and out.

## Features

- RECTANGULAR END: 220mm x 90 Fits over rectangular duct pipe.
- ROUND END: 150mm (6 inch) Fits inside round pipe of flexible hose.
- Allows you to convert between round and rectangular ducting systems.
- Kair short rectangular to round connector is perfect for installs where space is limited.
- Compatible with the extensive range of Kair plastic ducting fittings, outlets, and grilles

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07G2BLP5X |
| Batteries Required? | No |
| Batteries included? | No |
| Best Sellers Rank | 5,010 in DIY & Tools ( See Top 100 in DIY & Tools ) 10 in Ducting |
| Customer Reviews | 4.6 4.6 out of 5 stars (847) |
| Date First Available | 31 July 2018 |
| Item Weight | 300 g |
| Manufacturer | Kair |
| Manufacturer reference | DUCVKC5713 |
| Package Dimensions | 26.8 x 20.3 x 19.8 cm; 300 g |
| Part Number | DUCVKC5713 |
| Size | 220mm x 90mm to 150mm |

## Images

![Kair Ducting Adaptor 220mm x 90mm to 150mm - 6 inch Rectangular to Round Straight Channel Connector for Converting to Different Size Duct Systems - Image 1](https://m.media-amazon.com/images/I/310STx3UytL.jpg)
![Kair Ducting Adaptor 220mm x 90mm to 150mm - 6 inch Rectangular to Round Straight Channel Connector for Converting to Different Size Duct Systems - Image 2](https://m.media-amazon.com/images/I/315kLU1gQjL.jpg)
![Kair Ducting Adaptor 220mm x 90mm to 150mm - 6 inch Rectangular to Round Straight Channel Connector for Converting to Different Size Duct Systems - Image 3](https://m.media-amazon.com/images/I/31F3P3aB-ZL.jpg)
![Kair Ducting Adaptor 220mm x 90mm to 150mm - 6 inch Rectangular to Round Straight Channel Connector for Converting to Different Size Duct Systems - Image 4](https://m.media-amazon.com/images/I/31p78oSUU1L.jpg)
![Kair Ducting Adaptor 220mm x 90mm to 150mm - 6 inch Rectangular to Round Straight Channel Connector for Converting to Different Size Duct Systems - Image 5](https://m.media-amazon.com/images/I/41ZE-H4veSL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: Will this be compatible with elica flat ducting which is 222mm x 89mm**
A: No , needs to be round 6"

**Q: does this fit on to most portable air con units please**
A: No, you would need to check the size of the hose - this one is 100mm in diameter 
some are 125mm depending on the manufacturer

**Q: Would this vent an ac units hose through a letterbox? Thanks.**
A: Yes it will but you will need another adaptor which Amazon had on a buy both option.This slim adaptor is a god send and were using it as I write .

**Q: Will this fit a 6ich tube**
A: Hello 
If you look on the sizes . It says 100mm diameter. Which is approximately only 
4" .so no it wont fit 6"

## Customer Reviews

### ⭐⭐⭐⭐⭐ Dutch Adaptor
*by J***E on 18 September 2025*

Nice product

### ⭐⭐⭐⭐⭐ Flat bottom design.
*by S***E on 26 December 2025*

Great for joining round to flat pipe. Nice to have a flat bottom, most others had the conversion of round to rectangular in the middle, so if you needed the rectangular part to be horizontal (I did) then the design traps water. This connector solves the issue by having the rectangular part at the bottom water flows straight through from round to rectangular and out.

### ⭐⭐⭐⭐ Pretty good
*by M***C on 4 November 2023*

Not a bad adaptor, used in dual pairs to cross-over-under a set of ducts that were in an awkward height in my MVHR setup, eliminating a low-spot in the ducting that could have been a problem later on. It also came in quite handy for passing a duct over a pair of wooden beams that I couldn't cut through for the 100mm round pipe because it was load-bearing. It fitted with a good inch to spare, which was good as it left room for insulation around the ductwork. The end result is a professional-looking rigid setup that should last many years to come, instead of resorting to flexible ducting which always looks like a messy afterthought. The only let down is there are a couple of internal seams which protrude, but a few seconds with some sandpaper easily flattened those down.

## Frequently Bought Together

- Kair Ducting Adaptor 220mm x 90mm to 150mm - 6 inch Rectangular to Round Straight Channel Connector for Converting to Different Size Duct Systems
- Kair Rectangular Flat Ducting 220mm x 90mm - 1 Metre Length Flat Channel Pipe
- Kair 90 Degree Vertical Elbow Bend 220mm x 90mm - 9 x 4 inch Rectangular Plastic Ducting Adaptor

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.nz/products/72686694-kair-ducting-adaptor-220mm-x-90mm-to-150mm-6-inch](https://www.desertcart.nz/products/72686694-kair-ducting-adaptor-220mm-x-90mm-to-150mm-6-inch)

---

*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-02-14*