Kair White 100mm Gravity Wall Vent Grille - 99.5mm / 4 Inch Round Rear Spigot & 155mm Front Cover - Backdraught Prevention Shutter Flaps

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.

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.

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

This was a direct replacement for my old grille. Easy, perfect fit & works well

Great product - easy to install and good value

Good quality item. Didn't fit pipe in wall. Measured pipe carefully, ordered same size vent to replace damaged one. Didn't fit because of tiny difference in manufacturers. Wish all stuck to standard. Pipe in wall fits snug to brick. Vent needs to slot inside pipe not outside pipe as brick blocks it!

Fitted and works perfectly

The product works after some adjustment. Small blobs of plastic had to be sanded off for it to close properly

Perfetto. Quello che volevo. Color mattone si mimetizza alla perfezione sul paramano. Qualità/prezzo eccezionale. Lo uso da mesi.

No la he usado por lo que no puedo indicar correctamente si estoy satisfecho, así q no sirvo de ayuda

Aucun intérêt les volets obstruent l’air. Ne pas acheter

Excellent as a 150mm cooker hood vent.

Does what it's meant to