Securlec Multi Fit Louvred Ducting Grille - Terracotta 100mm / 4 Inch

This Securlec Multi Fit Louvred Ducting Grille is an external ventilation terminal designed to fit onto the end of a ducting run, letting air escape from kitchens, bathrooms and utility rooms while keeping wind driven rain, insects and debris out. The angled slats, set at roughly 30 to 45 degrees, allow air to pass through freely in both directions while shedding rain that hits the outside face of the wall. Finished in terracotta, this louvre grille is a popular choice for matching terracotta brick, red roof tiles and warm toned render.

The grille features a multi fit spigot that works with either round or square/flat ducting, making it a genuinely versatile option for new installs and retrofits alike. It is suitable for residential, commercial and industrial use, and can be fitted as part of electrical extractor fan ducting or gas appliance ducting runs.

Key Features

• Louvred ducting grille (external vent terminal) with a 100mm / 4 inch multi fit spigot
• Compatible with round ducting and square or flat ducting for flexible installation
• 129 x 129mm outer grille face fits neatly over a cored wall opening
• Angled louvre slats let air flow through while blocking wind driven rain and larger debris
• Terracotta finish to blend with red brick, clay tiles and warm toned render
• Suitable for kitchen, bathroom and utility room extractor ducting, plus electrical and gas appliance ducting

How to Use / How to Fit

Start by cutting the ducting to the required length and coring or cutting a hole through the external wall to match the duct diameter. Push the grille's spigot into the end of the ducting (or over it, depending on the duct type), sealing the joint with silicone if a fully airtight fit is needed. Feed the ducting and grille through the wall opening from the inside, then screw the outer flange of the grille to the external wall face using suitable fixings. Once fitted, check that the louvres sit facing downward slightly so that rainwater naturally sheds away from the opening.

Technical Specification

• Grille size: 129 x 129mm
• Spigot diameter: 100mm / 4 inch
• Colour: Terracotta
• Ducting compatibility: round or square/flat, multi fit design
• Use: kitchens, bathrooms, utility rooms, electrical and gas appliance ducting
• Application: residential, commercial and industrial

Frequently Asked Questions

What is a multi fit grille?
A multi fit grille is a louvred ducting grille designed with a spigot that can be fitted onto either round ducting or square/flat ducting, so one grille covers both duct types.

How do you fit a ducting grille?
The ducting is cut to length, the grille's spigot is pushed into or over the end of the ducting and sealed with silicone if needed, then the grille is screwed to the outside wall through its flange once the duct has been passed through a cored hole in the wall.

Can this be used for round and square ducting?
Yes, this is a multi fit design, so the same grille and spigot can be used with either round ducting or square/flat ducting, which makes it useful for retrofits where the existing duct shape is unknown or being changed.

Can this be used for a bathroom extractor fan?
Yes, this louvred grille is commonly used as the external terminal for bathroom, kitchen and utility room extractor fan ducting, as well as for electrical and gas appliance ducting runs.