--- product_id: 475042741 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: "10621 som" currency: KGS in_stock: true reviews_count: 5 category: "Kair" url: https://www.desertcart.kg/products/475042741-kair-110-mm-x-54-mm-rectangular-to-round-100 store_origin: KG region: Kyrgyzstan --- # 100mm round spigot connection 110mm x 54mm rectangular fit 90° elbow 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:** 10621 som **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?** 10621 som with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.kg](https://www.desertcart.kg/products/475042741-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 - • **Durable UK-Made Build:** Crafted from high-quality polypropylene for long-lasting, reliable performance. - • **Space-Savvy 90° Bend:** Navigate tight ceiling voids and compact areas without compromising airflow. - • **Optimized Airflow Tested:** Backed by BSRIA/BRE airflow performance tests ensuring efficient ventilation compliance. - • **Plug & Play Installation:** Quick, tool-free assembly with secure spigot connections—perfect for pros and DIYers alike. - • **Seamless Duct Conversion:** Effortlessly switch between rectangular and round ducting systems with precision fit. ## Overview The Kair 110mm x 54mm to 100mm rectangular-to-round 90° elbow adaptor 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. Tested for airflow performance and compliant with Part F Building Regulations, it’s ideal for bathroom extractors, kitchen fans, and whole-house ventilation setups. ## Description Kair Elbow Adapter 110mm x 54mm to 100mm - Rectangular to Round 90 Degree Curved Adapter - Male Rectangular 110mm x 54mm The flat end is a female spigot and fits over 110mm x 54mm rectangular pipe part:DUCVKC249 Round 100mm round end is a 100mm round connector that fits into 100mm round duct pipe. Part: DUCVKC250 allows you to convert round and rectangular ducting systems. Manufactured in the UK from high quality polystyrene / polypropylene. Max. / Min. Temperature: +60°C / -15°C. Easy to install and durable, just plug the air duct and fittings together. For permanent fixings, seal joints with silicone sealant or adhesive tape. Airflow performance independently tested by BSRIA or BRE. Suitable for use in accordance with Part F Building Regulations. 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 bathroom or kitchen extractor fans, hydroponics, inline extractor fans, tumble dryers or cooker hoods. This item can be used as part of a long line run for a variety of purposes, including whole house ventilation, passive stacking fan, positive input ventilation, air conditioning, HVAC and heat recovery systems. Kair plastic duct is ideal for DIY and crafts and offers excellent airflow performance and durability compared to flexible channels. Review: It does what it's supposed to do Review: Great ## 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 | | ASIN | B004X4RTUS | | Batteries Included? | No | | Batteries Required? | No | | Best Sellers Rank | #131,288 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #169 in Heating & Cooling Ducting Products | | Color | White | | Customer Reviews | 4.6 4.6 out of 5 stars (144) | | Customer reviews | 4.6 4.6 out of 5 stars (144) | | Date First Available | 20 May 2022 | | Date First Available | 20 May 2022 | | Is Discontinued By Manufacturer | No | | Item Package Quantity | 1 | | Item Weight | 99.8 g | | Item model number | DUCVKC237 | | Item model number | DUCVKC237 | | Manufacturer | Kair | | Manufacturer | Kair | | Material | Polypropylene | | Part number | DUCVKC237 | | Product Dimensions | 14.4 x 11.61 x 8.89 cm; 99.79 g | | 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. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by C***F on 20 February 2026* It does what it's supposed to do ### ⭐⭐⭐⭐⭐ Review *by A***R on 4 November 2025* Great ### ⭐⭐⭐⭐⭐ Review *by Q***Q on 28 August 2025* Item arrived on time and was satisfactory ## 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.kg/products/475042741-kair-110-mm-x-54-mm-rectangular-to-round-100](https://www.desertcart.kg/products/475042741-kair-110-mm-x-54-mm-rectangular-to-round-100) --- *Product available on Desertcart Kyrgyzstan* *Store origin: KG* *Last updated: 2026-04-23*