Kair 100mm louvred wall vent grille

A clean way to manage air flow through a wall vent, the Kair louvred wall vent grille brings together a 4 inch round outlet connection and a built-in anti insect flyscreen. It’s a practical choice when you are fitting, updating or routing ducting for bathroom or kitchen extraction systems, or for other ventilated setups where insects need to be kept out.

The design uses fixed louvres with an anti insect mesh, helping maintain airflow while reducing the chance of bugs getting into the ductwork. The grille includes a 155 mm front cover and a 99.5 mm rear spigot sized for a 100 mm duct connection, so you can build the vent run with common Kair duct and hose parts. 👍

The essentials

This Kair White vent grille is made from white plastic ducting components that suit typical UK home ventilation installs. It features fixed louvres and an anti insect mesh flyscreen, which is useful when the vent is in a location that is exposed to flying insects. It also keeps maintenance straightforward, because the louvre panel can be flicked open with a flat head screwdriver so you can access and clean the insect screen.

The grille is supplied with a round male rear spigot on the back, and there is a note that the spigot can be cut off if you prefer a flat surface. That flexibility can help if your wall penetration or fitting position is tighter than expected. 🛠️ For many installs, the push fit approach keeps the job uncomplicated, with ducting and fittings joining together as you assemble the run.

If you are building an extraction vent for a bathroom or kitchen extractor fan, or arranging airflow for hydroponics fans or an in line extract fan, this grille offers a tidy interface between ducting and the exterior wall opening. It is also sized to work with the matching Kair round duct connections listed by the manufacturer.

Key features

A key point with this product is the combination of louvres and a flyscreen. The fixed louvres help control airflow at the grille face, while the anti insect mesh provides a barrier that can reduce insect ingress. There is also a practical cleaning method, since the louvre can be flicked open with a flat head screwdriver to reach the insect screen.

The external dimensions are listed as 155 mm by 155 mm, which can be useful when you are planning wall openings and surface mounting positions. The rear connection uses a 4 inch, 100 mm round male spigot, supplied at 99.5 mm according to the product information. If your preferred layout is different, take into account that the male spigot can be cut off for a flatter mounting surface.

For installation, the product is described as easy to fit, using a push fit style where you push the duct and fittings together. That approach is often helpful when you want a neat finish without complicated steps. ✅

It is also described as matching Kair 100 mm round female duct pipe part DUCVKC250, or a 102 mm flexible hose part DUCP0092/102/35, so you can plan your ducting pieces around those connections. If you are working with a compatible extractor fan vent setup, hydroponics fan airflow, or an in line extract fan run, this grille is intended to sit at the wall outlet.

Tech specs

• Product name: Kair White 100mm Louvred Wall Vent Grille with Flyscreen
• External dimensions: 155mm x 155mm
• Rear spigot type: 4 inch, 100mm round male rear spigot
• Rear spigot size: 99.5mm
• Front cover size: 155mm front cover
• Louvres and screen: fixed louvres with anti insect mesh flyscreen
• Installation method: push fit duct and fittings together

Worth considering if

It’s a good fit if you need a wall vent grille for air outlet or inlet work, and you want integrated anti insect protection at the grille face. It makes sense if you are building or maintaining a bathroom or kitchen extractor fan vent, or setting up ventilation for hydroponics fan use. It may not be a great match if your install plan requires a different duct connection size than 100 mm round male spigot or the listed compatible Kair duct and flexible hose parts. Always check your duct run and wall opening planning against the 155 mm x 155 mm external dimension before installation, so the final fit looks clean and the airflow path stays correct.