--- 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" price: "€ 25.86" currency: EUR in_stock: true reviews_count: 13 url: https://www.desertcart.at/products/48320142-kair-110-mm-x-54-mm-rectangular-to-round-100 store_origin: AT region: Austria --- # 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 **Price:** € 25.86 **Availability:** ✅ In Stock ## Summary > ↪️ Upgrade your airflow game with the ultimate ducting adapter! 💨 ## 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 - **How much does it cost?** € 25.86 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.at](https://www.desertcart.at/products/48320142-kair-110-mm-x-54-mm-rectangular-to-round-100) ## Best For - Customers looking for quality international products ## Why This Product - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Space-Savvy 90° Bend:** Navigate tight ceiling voids and restricted areas with a compact elbow design. - • **Plug & Play Installation:** Clip-fit design ensures quick setup—no fuss, no tools required. - • **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, optimizing ventilation in kitchens, bathrooms, and HVAC systems. ## Overview The Kair 110mm x 54mm to 100mm Rectangular to Round 90 Degree Bend adapter enables seamless conversion between rectangular and round ducting systems. Made in the UK from durable polypropylene, it features a space-saving 90° elbow design ideal for tight installations. Independently tested for airflow efficiency and compliant with Part F building codes, this clip-fit adapter is perfect for enhancing ventilation in residential and commercial HVAC 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: Great item. Does what it says it does :) - Spot on did exactly what it said it would do. Brilliant supplier and product. Review: Portable Air con vent - Saves having the zip up window cover for it as i had previously so got this instead see pic. Bit of manual modification but works perfectly and clips tightly to my top half window opening in front room and bedroom. Just the perfect solution ## 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 | 11,125 in DIY & Tools ( See Top 100 in DIY & Tools ) 21 in Ducting 233 in Tap Parts | | Colour | White | | Customer Reviews | 4.6 4.6 out of 5 stars (681) | | Date First Available | 19 April 2011 | | Guaranteed software updates until | unknown | | 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 ### ⭐⭐⭐⭐⭐ Great item. Does what it says it does :) *by S***N on 30 June 2026* Spot on did exactly what it said it would do. Brilliant supplier and product. ### ⭐⭐⭐⭐⭐ Portable Air con vent *by A***X on 13 May 2026* Saves having the zip up window cover for it as i had previously so got this instead see pic. Bit of manual modification but works perfectly and clips tightly to my top half window opening in front room and bedroom. Just the perfect solution ### ⭐⭐⭐⭐⭐ Well fitting quality items. *by M***N on 23 December 2025* Very well made and snug fitting items with very quick delivery. ## 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.at/products/48320142-kair-110-mm-x-54-mm-rectangular-to-round-100](https://www.desertcart.at/products/48320142-kair-110-mm-x-54-mm-rectangular-to-round-100) --- *Product available on Desertcart Austria* *Store origin: AT* *Last updated: 2026-10-05*