--- product_id: 48320142 title: "Kair 110 mm x 54 mm Rectangular to Round (100 mm Male Spigot) 90 Degree Bend - SYS-100 - DUCVKC237 by Kair" brand: "kair" price: "158.21 DT" currency: TND in_stock: true reviews_count: 13 category: "Kair" url: https://www.desertcart.tn/products/48320142-kair-110-mm-x-54-mm-rectangular-to-round-100 store_origin: TN region: Tunisia --- # 100mm round spigot connection 110mm x 54mm rectangular fit 90° bend for tight spaces Kair 110 mm x 54 mm Rectangular to Round (100 mm Male Spigot) 90 Degree Bend - SYS-100 - DUCVKC237 by Kair **Brand:** kair **Price:** 158.21 DT **Availability:** ✅ In Stock ## Summary > ↪️ Upgrade your airflow game — ducting made sleek and smart! 💨 ## Quick Answers - **What is this?** Kair 110 mm x 54 mm Rectangular to Round (100 mm Male Spigot) 90 Degree Bend - SYS-100 - DUCVKC237 by Kair by kair - **How much does it cost?** 158.21 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/48320142-kair-110-mm-x-54-mm-rectangular-to-round-100) ## 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 - • **Space-Savvy 90° Elbow:** Navigate tight ceiling voids and compact areas with a precision-engineered bend. - • **Plug & Play Installation:** Snap-fit design means no fuss—clip, seal, and optimize your ventilation setup in minutes. - • **Seamless Duct Conversion:** Effortlessly switch between rectangular and round ducting systems for ultimate versatility. - • **Premium UK-Made Durability:** Crafted from high-quality polypropylene for long-lasting, reliable airflow performance. - • **Certified Airflow Efficiency:** Independently tested to meet Part F building codes, ensuring optimal static pressure and performance. ## Overview The Kair 110mm x 54mm to 100mm rectangular-to-round 90° bend adapter is a UK-manufactured polypropylene fitting designed for seamless duct transitions in HVAC systems. It fits over 110mm x 54mm rectangular ducts and inserts into 100mm round ducts, enabling efficient airflow in tight spaces like ceiling voids. Engineered for durability and easy installation, it meets Part F building regulations and is ideal for kitchens, bathrooms, and whole-house ventilation setups. ## Description Kair Elbow Adapter 110mm x 54mm to 100mm - Rectangular to Round 90 Degree Bent Adapter - Male Rectangular 110mm x 54mm The flat end is a female spigot and fits over 110mm x 54mm rectangle pipe part: DUCVKC249 Round 100mm round end is a 100mm round connector fitting that fits into 100mm round duct pipe. Part: DUCVKC250 Allows you to convert round and rectangular ducting systems. Made in the UK from high quality polystyrene/polypropylene Max. Min. Temperature: +60°C / -15°C. Easy to install and durable, just clip the air duct and fittings together. For permanent fixings, seal joints with silicone sealant or tape. Air flow performance independently tested by BSRIA or BRE. Suitable for use in accordance with Part F building codes. Static pressure drop in Pascals: 15 l/s = 8.10 Pa - 30 l/s = 33.10 Pa - 60 l/s = 136.40 Pa. Perfect for extractor fans in bathroom or kitchen, hydroponics, in-line extractor fans, tumble dryers or cooker hood. This item can be used as part of a long line run for a variety of purposes including whole house ventilation, passive stack fan, positive input ventilation, air conditioning, HVAC and heat recovery systems. Kair plastic duct is ideal for DIY and crafts and provides excellent airflow performance and durability compared to flexible ducts. Review: Good product but not left in safe place - Perfect for what i need, arrived in good condition but driver left it unsafe on my door step without any notice for every passer by to see and steal if they wanted to. I only noticed it was on my door step by chance. Otherwise good product Review: Well fitting quality items. - Very well made and snug fitting items with very quick delivery. ## Features - RECTANGULAR END: 110mm x 54mm Fits over rectangular duct pipe. - ROUND END: 100mm (4 inch) Fits inside round duct pipe. - Allows you to convert between 100mm round and 110mm x 54mm rectangular ducting systems. - 90 Degree elbow bend adaptors allows you to run duct inside ceiling voids or other areas where space is restricted. - Compatible with Kair plastic ducting range of fittings, outlets, and grilles. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B004X4RTUS | | Batteries Required? | No | | Batteries included? | No | | Best Sellers Rank | 13,141 in DIY & Tools ( See Top 100 in DIY & Tools ) 30 in Ducting 246 in Tap Parts | | Colour | White | | Customer Reviews | 4.5 4.5 out of 5 stars (660) | | Date First Available | 19 April 2011 | | Item Package Quantity | 1 | | Item Weight | 99.8 g | | Item model number | DUCVKC237 | | Manufacturer | Kair | | Material | Polypropylene | | Part Number | DUCVKC237 | | Product Dimensions | 14.4 x 11.61 x 8.89 cm; 99.79 g | | Size | 110mm x 54mm to 100mm (Male) | ## Images ![Kair 110 mm x 54 mm Rectangular to Round (100 mm Male Spigot) 90 Degree Bend - SYS-100 - DUCVKC237 by Kair - Image 1](https://m.media-amazon.com/images/I/41DszoEqnvL.jpg) ![Kair 110 mm x 54 mm Rectangular to Round (100 mm Male Spigot) 90 Degree Bend - SYS-100 - DUCVKC237 by Kair - Image 2](https://m.media-amazon.com/images/I/61-mQbpvwPL.jpg) ![Kair 110 mm x 54 mm Rectangular to Round (100 mm Male Spigot) 90 Degree Bend - SYS-100 - DUCVKC237 by Kair - Image 3](https://m.media-amazon.com/images/I/51aqWG7+zwL.jpg) ![Kair 110 mm x 54 mm Rectangular to Round (100 mm Male Spigot) 90 Degree Bend - SYS-100 - DUCVKC237 by Kair - Image 4](https://m.media-amazon.com/images/I/51LFP9smHuL.jpg) ![Kair 110 mm x 54 mm Rectangular to Round (100 mm Male Spigot) 90 Degree Bend - SYS-100 - DUCVKC237 by Kair - Image 5](https://m.media-amazon.com/images/I/51fjr0PJuoL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: Do u have Elbow Bend Adaptor for 6 inch** A: Hi there, I didn't find this very obvious, so unlike safetyspot, I'll try and be a bit more helpful. You need to click on each size option and there are photos of that particular size plus a different diagram on each one with the dimensions on. Not all listings change according to the option you click on, there is just a standard photo and you choose your dimensions, however, this will show you exactly what it looks like and give you a diagram with the dimensions accordingly. 6 inches is just over 15cm so have a look at one that memtions that size and check the dimensions on the diagram. **Q: Is this safe to connect to tumble dryer as the manufacturer instructions state thay aluminium must be used not plastic** A: I used this as an exhaust for a portable air conditioning unit not a tumble dryer, but having sai that, the pipe from the tumble dryer that came with the tumble dryer was always warm but this item didn’t get as hot as the rest and of the pipe and it’s hard plastic, it coped fine and that was with the the crazy plus 40 temperatures in the uk last summer, I’d say that this item handles heat very well and a tumble drier shouldn’t be an issue, given my experience **Q: What connector would i need to attach a 125mm od flexible hose to this kair plenum elbow bend adaptor 234mm x 29mm to 100mm** A: Why not buy the right size in the first place? 125mm hose fits 125mm outlet. See range of available sizes on Kair’s website. **Q: Could this be used as the inlet suction point for an extractor fan instead of the traditional ceiling/wall round vent?** A: Hi as soon it matches your measurements;) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Good product but not left in safe place *by K***G on 1 February 2026* Perfect for what i need, arrived in good condition but driver left it unsafe on my door step without any notice for every passer by to see and steal if they wanted to. I only noticed it was on my door step by chance. Otherwise good product ### ⭐⭐⭐⭐⭐ Well fitting quality items. *by M***N on 23 December 2025* Very well made and snug fitting items with very quick delivery. ### ⭐⭐⭐⭐ Did the job *by S***Y on 27 August 2021* Used as part of a tricky static installation of an aircon. It did the job, although 'the job' involved a lot of ingenuity, foamed neoprene sheet, neoprene glue and ingenuity. ## Frequently Bought Together - Kair 110 mm x 54 mm Rectangular to Round (100 mm Male Spigot) 90 Degree Bend - SYS-100 - DUCVKC237 by Kair - Kair Rectangular Flat Ducting 110mm x 54mm - 1 Metre Length Flat Channel Pipe - Kair Rectangular Straight Connector 100mm x 54mm Flat Pipe Joint --- ## 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.tn/products/48320142-kair-110-mm-x-54-mm-rectangular-to-round-100](https://www.desertcart.tn/products/48320142-kair-110-mm-x-54-mm-rectangular-to-round-100) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-04-24*