--- product_id: 48826074 title: "Kair White 100mm Gravity Wall Vent Grille - 99.5mm / 4 Inch Round Rear Spigot & 155mm Front Cover - Backdraught Prevention Shutter Flaps" price: "B/.152" currency: PAB in_stock: true reviews_count: 13 url: https://www.desertcart.com.pa/products/48826074-kair-white-100mm-gravity-wall-vent-grille-99-5mm-4 store_origin: PA region: Panama --- # 7200mm² free airflow Automatic non-return shutters 4 inch / 100mm rear spigot Kair White 100mm Gravity Wall Vent Grille - 99.5mm / 4 Inch Round Rear Spigot & 155mm Front Cover - Backdraught Prevention Shutter Flaps **Price:** B/.152 **Availability:** ✅ In Stock ## Summary > 🌬️ Elevate your space with ventilation that works smarter, not harder. ## Quick Answers - **What is this?** Kair White 100mm Gravity Wall Vent Grille - 99.5mm / 4 Inch Round Rear Spigot & 155mm Front Cover - Backdraught Prevention Shutter Flaps - **How much does it cost?** B/.152 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.pa](https://www.desertcart.com.pa/products/48826074-kair-white-100mm-gravity-wall-vent-grille-99-5mm-4) ## 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 - • **Built to Last Outdoors:** Durable polypropylene construction resists weather and wear for long-term reliability. - • **Smart Gravity Shutters:** Automatic non-return flaps block draughts, pests, and odors—no springs, no fuss. - • **Plug & Play Installation:** Push-fit 4 inch rear spigot design for seamless, tool-free setup. - • **Effortless Airflow Mastery:** 7200mm² free air passage ensures optimal ventilation without compromise. - • **Regulation-Ready Performance:** Compliant with Part F Building Regulations and independently airflow tested. ## Overview The Kair White 100mm Gravity Wall Vent Grille features a 155mm front cover and a 4 inch (99.5mm) round rear spigot designed for easy push-fit installation. Its automatic gravity-operated non-return shutter flaps prevent backdraughts, odors, and pests without the risk of spring failure. With a free airflow area of 7200mm² and low static pressure drop, it’s ideal for bathroom, kitchen, HVAC, and whole-house ventilation systems. Made from durable polypropylene, it meets Part F Building Regulations and has been independently tested for airflow performance. ## Description Product Description Kair Gravity Grilles Non-return shutter flaps close automatically when not in use. Stops unpleasant odours, noises, or draughts flowing back through your duct. Gravity flap - no need for springs that could break. Kair Gravity Grilles / Ducting Air Vents With Not-Return Shutters Available in 3 sizes and 5 colours. Plastic air exhaust outlets round vent with non-return shutter flaps which close automatically when not in use to prevent unpleasant odours noises or draughts flowing back through your duct into your property. Easy to install just push-fit together & seal if required using a method of your choice (Popular options include Mastic Sealant Poly Cement or Tape). Perfectly suited as an outlet for your Bathroom Toilet or Kitchen extractor fan Hydroponics In-Line Extract Fans or Cooker Hood. Kair Plastic Ducting Grille Dimensions 100mm / 4" 155mm External dimensions of the front facia of the grille. 100mm - 4 inch round rear spigot for connecting to plastic ducting and extractor fans. Static Pressure Drop in Pascals 15 l/s = 10.94 Pa 30 l/s = 18.59 Pa 60 l/s = 24.21 Pa 125mm / 5" 125mm - 5 inch round rear spigot for connecting to plastic ducting and extractor fans. 15 l/s = 6.43 Pa 30 l/s = 9.91 Pa 60 l/s = 11.25 Pa 150mm / 6" 183mm External dimensions of the front facia of the grille. 150mm - 6 inch round rear spigot for connecting to plastic ducting and extractor fans. 15 l/s = 6.91 Pa 30 l/s = 8.76 Pa 60 l/s = 11.10 Pa Kair Gravity Grille 100mm / 4 inch with Round Spigot 4 inch / 100mm round male spigot on the back of the grille fits inside most comparable size pipes/hoses such as Kair 100mm Round Female Duct Pipe Part: DUCVKC250 or 102mm flexible hose Part: DUCP002/102/35. Free Air: 7200mm2. Kair Gravity Grille 125mm / 5 inch with Round Spigot 5 inch / 125mm round male spigot on the back of the grille fits inside most comparable size pipes/hoses such as Kair 125mm Round Female Duct Pipe Part: DUCVKC267 or 127mm flexible hose Part: DUCP0092/127/35. Free Air: 11,600mm2. Kair Gravity Grille 150mm / 6 inch with Round Spigot 6 inch / 150mm round male spigot on the back of the grille fits inside most comparable size pipes/hoses such as Kair 150mm Round Female Duct Pipe Part: DUCVKC670 or 152mm flexible hose Part: DUCP0092/152/35. Free Air: 16,000mm2. Kair Ducting & Ventilation Range Gravity Grilles / Ducting Air Vents are part of the Kair ducting and ventilation range. Unlike generic imported products Kair products are made in the UK and are compatible with the extensive range of fittings outlets and grilles in multiple sizes to offer your a complete solution for all of your ventilation needs. 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. Plastic rigid ducting is perfect for DIY and Trade use and provides superior airflow performance and durability versus flexible duct. Review: Well-designed and reliable external vent with effective shutters - This Kair gravity grille is a solid choice for anyone needing a dependable external air vent. The 183mm size fits perfectly with standard 150mm (6 inch) ducting, and the rear spigot makes installation straightforward—no fuss, no need for extra adapters. The build quality is excellent, with sturdy plastic that feels like it will last well outdoors. The gravity shutters work flawlessly, opening easily with airflow and closing smoothly to keep out draughts, pests, and rain when not in use. The beige colour blends in nicely with exterior walls and doesn’t look out of place. Overall, it’s a practical, effective solution for ventilation that does exactly what it’s supposed to, without any hassle. Highly recommended if you’re upgrading extractor fans or installing a new vent—good value and reliable performance. Review: Well-made external vent grille with a neat finish - This gravity grille is good quality and feels well made. The white finish looks clean and tidy once installed, and it fits perfectly with 150mm (6 inch) ducting. The rear spigot connects securely and lines up nicely. The flap operates smoothly and helps prevent draughts when not in use. Installation was straightforward and the grille feels solid rather than flimsy. Overall, a reliable and well-designed external vent that does exactly what it’s meant to do. ## Features - White Plastic Ducting Air Inlet / Air Outlet with Gravity Shutters. 155mm x 155mm external dimension with 4 inch / 100mm round male rear spigot on the back of the grille for indoor or outdoor use. - Non-return shutter flaps close automatically when not in use. Stops unpleasant odours, noises, or draughts flowing back through your duct. Gravity flap - no need for springs that could break. - Easy to install, just push-fit duct and fittings together. Perfectly suited Bathroom or Kitchen extractor fan, Hydroponics fan, or In-Line Extract Fan. - This grille can be used as a part of a long ductwork run for a variety of purposes including whole house ventilation, passive ventilation, positive input, air conditioning, HVAC, and Heat Recovery Systems. - Suitable to use in compliance with Part F Building Regulations. Airflow performance independently tested by BSRIA or BRE. Free Air: 7200mm2. Static Pressure Drop in Pascals: 15 l/s = 10.94 Pa - 30 l/s = 18.59 Pa - 60 l/s = 24.21 Pa. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B004X4RVUQ | | Batteries Required? | No | | Batteries included? | No | | Best Sellers Rank | 1,466 in DIY & Tools ( See Top 100 in DIY & Tools ) 1 in Boilers & Accessories | | Brand | Kair | | Colour | White | | Compatible Devices | cooker_hood | | Control Console | Manual | | Customer Reviews | 4.5 4.5 out of 5 stars (4,869) | | Date First Available | 19 April 2011 | | Efficiency (10 classes) | A+++ to G | | Included Components | Non-return shutter flaps, 4 inch / 100mm round male spigot | | Item Weight | 81.6 g | | Material Type | Polypropylene (PP) | | Model | SYS-100 | | Part Number | DUCVKC243 | | Product Dimensions | 15.5 x 4 x 15.5 cm; 81.65 g | | Special Features | Automatic Non-Return Shutters | ## Product Details - **Brand:** Kair - **Colour:** White - **Finish type:** Painted - **Product dimensions:** 10.2D x 39.4W x 15.5H centimetres - **Special feature:** Automatic Non-Return Shutters ## Images ![Kair White 100mm Gravity Wall Vent Grille - 99.5mm / 4 Inch Round Rear Spigot & 155mm Front Cover - Backdraught Prevention Shutter Flaps - Image 1](https://m.media-amazon.com/images/I/41kqLrMfzwL.jpg) ![Kair White 100mm Gravity Wall Vent Grille - 99.5mm / 4 Inch Round Rear Spigot & 155mm Front Cover - Backdraught Prevention Shutter Flaps - Image 2](https://m.media-amazon.com/images/I/71vJ9FEF4lL.jpg) ![Kair White 100mm Gravity Wall Vent Grille - 99.5mm / 4 Inch Round Rear Spigot & 155mm Front Cover - Backdraught Prevention Shutter Flaps - Image 3](https://m.media-amazon.com/images/I/71vlw+JVXQL.jpg) ![Kair White 100mm Gravity Wall Vent Grille - 99.5mm / 4 Inch Round Rear Spigot & 155mm Front Cover - Backdraught Prevention Shutter Flaps - Image 4](https://m.media-amazon.com/images/I/71Aa4OXvo+L.jpg) ![Kair White 100mm Gravity Wall Vent Grille - 99.5mm / 4 Inch Round Rear Spigot & 155mm Front Cover - Backdraught Prevention Shutter Flaps - Image 5](https://m.media-amazon.com/images/I/712ZJy+T29L.jpg) ## Available Options This product comes in different **Color, Size** options. ## Questions & Answers **Q: Is the 10cm the size of the 'flaps' or the width of the whole unit?** A: the size is not applicable to either of the above , it refers to the size of ducting you can attach to the grill tohere is the actual sizes for the gravity grill 100mm / 10cm Product Type Wall VentHeight (mm) 155Length (mm) 155Width (mm) 40Spigot size (mm) 28 x 96 x 96 **Q: Does anyone know if when the extractor is on are the flaps meant to open up? Mines doesn’t seem to open up at all.** A: Assuming the extractor fan is blowing out through the grille, the flaps should open. How far they open depends on the strength of the air-flow from the fan. **Q: What is the pitch of the fixing holes, looking for 110mm horizontal by 100mm vertical.** A: The fixing holes on this product correspond to the measurement you are looking for 110mm wide between securing holes x 100mm high between securing holes **Q: Has anyone used this on an plastic outdoor keter shed?** A: should be fine with a suitable interface sealant ## Customer Reviews ### ⭐⭐⭐⭐⭐ Well-designed and reliable external vent with effective shutters *by P***L on 17 October 2025* This Kair gravity grille is a solid choice for anyone needing a dependable external air vent. The 183mm size fits perfectly with standard 150mm (6 inch) ducting, and the rear spigot makes installation straightforward—no fuss, no need for extra adapters. The build quality is excellent, with sturdy plastic that feels like it will last well outdoors. The gravity shutters work flawlessly, opening easily with airflow and closing smoothly to keep out draughts, pests, and rain when not in use. The beige colour blends in nicely with exterior walls and doesn’t look out of place. Overall, it’s a practical, effective solution for ventilation that does exactly what it’s supposed to, without any hassle. Highly recommended if you’re upgrading extractor fans or installing a new vent—good value and reliable performance. ### ⭐⭐⭐⭐⭐ Well-made external vent grille with a neat finish *by A***R on 4 January 2026* This gravity grille is good quality and feels well made. The white finish looks clean and tidy once installed, and it fits perfectly with 150mm (6 inch) ducting. The rear spigot connects securely and lines up nicely. The flap operates smoothly and helps prevent draughts when not in use. Installation was straightforward and the grille feels solid rather than flimsy. Overall, a reliable and well-designed external vent that does exactly what it’s meant to do. ### ⭐⭐⭐⭐ Basic cover that looks to be durable. A good fit. *by J***S on 12 March 2018* Overview: Well made, durable ventilation cover. Disclaimer: I don’t know what I’m doing, I really don’t! This is the first ventilation cover I’ve installed. Hopefully if you don’t know what you’re doing either, then this review helps! I also bought this after the initial purchase I made was too big. A reminder to check the sizing - 100mm is the diameter of the insert that goes into the wall. Postage and Packaging: Nice and quick, but the packaging within the amazon box was a polythene bag. This is quickly becoming the norm where there is no commercial packaging included at all. First Impressions: The vent cover is a matt black and as such is not jet black to the eye. Its not grey, but certainly with the lack of shine it displays, then it is certainly not Jet black either. Other than that it seems well made and an appropriate standard. There is nothing else included in the package - no screws or Raul plugs. This isn’t an issue if you are replacing a current vent cover, and not much of an issue with a new install. Design: I’ve already covered the matt nature - and this is down to it being slight textured to the touch. Other than that, it has 3 horizontal slats, as opposed to the 4 that my previous one had. I suspect that the 3 will be slightly more resistant to airflow which may help in wind but other than that I don’t know what relevance it has. Figment and use: The screw holes for my old one were not quite in the same place, so new holes needed to be drilled and new rawl plugs used. Other than that, the holes on the cover allow a little latitude to move it for a precise fitting. Once installed, it pretty much stays there. The biggest negative I’ve read in previous reviews is that the slats move in the wind creating a clacking/banging noise. Its early days, and I suspect it is very dependant on individual houses. If this happens and it is enough to want to go to the effort to solve, I suspect sticking a small gel nub on the back of slats would stop it fine. Longevity: Its a cover. The previous one lasted for a good 14 years since the house was built. I suspect that this should last longer with no issues. However, if it does fail in a short period then as always I will update this review ## Frequently Bought Together - Kair White Gravity Grille 155mm External Dimension Ducting Air Vent with 100mm - 4 inch Round Rear Spigot and Not-Return Shutters - Kair Plastic Ducting Pipe 100mm - 350mm Short Length - Rigid Straight Duct Channel - Kair White Louvred Wall Vent Grille 155mm External Dimension with Flyscreen and Round 100mm - 4 inch Rear Spigot --- ## 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.com.pa/products/48826074-kair-white-100mm-gravity-wall-vent-grille-99-5mm-4](https://www.desertcart.com.pa/products/48826074-kair-white-100mm-gravity-wall-vent-grille-99-5mm-4) --- *Product available on Desertcart Panama* *Store origin: PA* *Last updated: 2026-07-02*