Securit White Plastic Louvre Vent 9 x 9 Inch - Removable Flyscreen

This Securit louvre vent is a white plastic ventilation cover sized to a triple brick course opening (9 x 9 inch), the largest of the standard sizes, and is designed to fit into a wall, door or duct wherever higher volume background ventilation is needed. The angled slats, set between 30 and 45 degrees, let air pass freely through the opening in both directions while shedding wind driven rain and blocking larger debris from getting through.

Key Features

• Durable white plastic construction that will not rust, corrode or need painting
• Large 9 x 9 inch vent, covering three standard brick courses
• Removable flyscreen that clips out of the frame for thorough cleaning and clips straight back in
• Free air space of 21900 sq mm, the actual open area available for airflow through the vent
• Marked suitable for venting gas appliances

Free air space is always smaller than the outer size of the vent because the slats and frame reduce the opening, and it is this figure, rather than the overall dimensions, that is used when checking a vent against building regulations. UK Approved Document C requires background ventilation of suspended timber floors of at least 1500 sq mm per metre run of wall, or 500 sq mm per square metre of floor area, whichever is the greater, with vents fitted on at least two opposite sides of the building for effective cross ventilation.

How to Fit a Louvre Vent

For a straight swap into an existing airbrick or terracotta frame, unscrew or unclip the old cover and fit this vent using the same fixing holes, so the surrounding brickwork is left undisturbed.

For a brand new opening in a solid wall, the mortar is chiselled or drilled away to the size of the vent frame, the vent is bedded on fresh mortar and tapped flush with the wall face, and the joint is then pointed to match the surrounding brickwork.

How to Clean the Flyscreen

Because the flyscreen on this vent is removable, it clips out of the frame so it can be taken out fully, cleaned properly of dust, cobwebs and debris, and clipped back into place afterwards. This makes it a better option than a fixed flyscreen, which is riveted into the frame and can only be wiped clean while still fitted, especially in dustier spots such as garages, workshops and outbuildings.

Technical Specification

• Size: 9 x 9 inch (three brick courses)
• Free air space: 21900 sq mm
• Material: white plastic
• Flyscreen: removable, clips out for cleaning
• Gas appliances: suitable
• Colour: white

Frequently Asked Questions

What is a louvre vent?
A louvre vent is a ventilation cover built from angled slats, typically set between 30 and 45 degrees, fitted into a wall, door or duct opening so air can pass through while wind driven rain is shed and larger debris is kept out.

How do you clean a louvre vent?
Wipe over the louvre slats with a damp cloth, then unclip the removable flyscreen from the frame, clean off any dust and debris, and clip it back in once it is dry.

What is the difference between a fixed and a removable flyscreen vent?
A removable flyscreen, as fitted here, clips out of the frame for cleaning and refitting. A fixed flyscreen is riveted permanently into the frame and can only be wiped clean in place.

How do you fit a louvre vent to a terracotta frame?
Unscrew or unclip the old cover from the existing terracotta or airbrick frame and fit this vent into the same fixing holes for a simple like for like replacement.