---
product_id: 52216896
title: "Kair Ducting Adaptor 110mm x 54mm to 100mm - 4 inch Rectangular to Round Straight Channel Connector for Converting to Different Size Duct Systems"
brand: "kair"
price: "₱1730"
currency: PHP
in_stock: true
reviews_count: 13
category: "Kair"
url: https://www.desertcart.ph/products/52216896-kair-ducting-adaptor-110mm-x-54mm-to-100mm-4-inch
store_origin: PH
region: Philippines
---

# 100mm round spigot compatibility 110mm x 54mm rectangular fit Low static pressure drop Kair Ducting Adaptor 110mm x 54mm to 100mm - 4 inch Rectangular to Round Straight Channel Connector for Converting to Different Size Duct Systems

**Brand:** kair
**Price:** ₱1730
**Availability:** ✅ In Stock

## Summary

> 🔄 Transform your ducting game with precision and ease!

## Quick Answers

- **What is this?** Kair Ducting Adaptor 110mm x 54mm to 100mm - 4 inch Rectangular to Round Straight Channel Connector for Converting to Different Size Duct Systems by kair
- **How much does it cost?** ₱1730 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ph](https://www.desertcart.ph/products/52216896-kair-ducting-adaptor-110mm-x-54mm-to-100mm-4-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 for optimal airflow with minimal pressure loss.
- • **Space-Smart Design:** Compact profile ideal for tight installations where every inch counts.
- • **Durable UK-Made Build:** Crafted from high-quality polystyrene/polypropylene for lasting performance.
- • **Plug & Play Installation:** Push-fit connection for quick setup; seal with silicone for permanent security.
- • **Seamless Size Conversion:** Effortlessly switch between rectangular and round duct systems without hassle.

## Overview

The Kair Ducting Adaptor converts 110mm x 54mm rectangular ducts to 100mm round ducts, enabling versatile HVAC configurations. Made in the UK from durable plastic, it supports efficient airflow with low static pressure drop, fits tight spaces, and is easy to install with push-fit technology. Perfect for bathroom, kitchen, and whole-house ventilation systems, it’s a trusted choice for both DIYers and professionals.

## Description

Kair Ducting Adaptor 110mm x 54mm to 100mm - 4 inch Rectangular to Round Straight Channel Connector RECTANGULAR 110mm x 54mm The flat end is a female spigot and fits over 110mm x 54mm Rectangular Duct Pipe Part: DUCVKC249. ROUND 100mm / 4 inch Circular end is a 100mm round female spigot that will accept any male 100mm round fittings. br> Requires round duct connector Part: DUCEK28 to connect to 100mm straight pipe - Part: DUCVKC250. 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: 15 l/s = 3.70 Pa - 30 l/s = 14.60 Pa - 60 l/s = 58.00 Pa.Perfectly 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: Good product - Bought it for my portable AC. Fits well
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: 110mm x 54mm Fits over rectangular duct pipe.
- ROUND END: 100mm (4 inch) Fits over other connectors and fittings, pipe requires additional connector.
- Allows you to convert between round and rectangular ducting systems.
- Kair short rectangular to round connector is perfect for installs where space is limited.
- Kair 100% Satisfaction Guarantee. Compatible with the extensive range of plastic ducting fittings, outlets, and grilles

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B004X4S1K0 |
| Batteries Required? | No |
| Batteries included? | No |
| Best Sellers Rank | 5,417 in DIY & Tools ( See Top 100 in DIY & Tools ) 11 in Ducting 359 in Bathroom Hardware |
| Colour | White |
| Customer Reviews | 4.6 4.6 out of 5 stars (850) |
| Date First Available | 19 April 2011 |
| Item Package Quantity | 1 |
| Item Weight | 90.7 g |
| Manufacturer | Kair |
| Manufacturer reference | DUCVKC253F |
| Material | Polystyrene |
| Number of Pieces | 1 |
| Part Number | DUCVKC253F |
| Product Dimensions | 12 x 11.4 x 10.7 cm; 90.72 g |
| Size | 110mm x 54mm to 100mm |

## Product Details

- **Brand:** Kair
- **Colour:** White
- **Connector type:** Adapter
- **Item dimensions L x W x H:** 12 x 11.4 x 10.7 centimetres
- **Item weight:** 0.2 Pounds
- **Material:** Polystyrene
- **Number of pieces:** 1
- **Size:** 110mm x 54mm to 100mm
- **Thread size:** 100mm
- **Thread type:** UN

## Images

![Kair Ducting Adaptor 110mm x 54mm to 100mm - 4 inch Rectangular to Round Straight Channel Connector for Converting to Different Size Duct Systems - Image 1](https://m.media-amazon.com/images/I/41BZCtM3oSL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good product
*by C***Z on 15 January 2026*

Bought it for my portable AC. Fits well

### ⭐⭐⭐⭐⭐ 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 110mm x 54mm to 100mm - 4 inch Rectangular to Round Straight Channel Connector for Converting to Different Size Duct Systems
- Kair Rectangular Flat Ducting 110mm x 54mm - 1 Metre Length Flat Channel Pipe
- Kair 110 mm x 54 mm Rectangular to Round (100 mm Male Spigot) 90 Degree Bend - SYS-100 - DUCVKC237 by Kair

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*Product available on Desertcart Philippines*
*Store origin: PH*
*Last updated: 2026-03-09*