Air Brick Square Hole No.351 – 215 x 140mm – Red

The Air Brick Square Hole No.351 (215 x 140mm – Red) is a durable clay airbrick designed to provide effective ventilation for sub-floor voids, cavity walls, and general building applications. With its square perforation design and classic red finish, it offers both performance and a traditional appearance that blends seamlessly with red brickwork.

Specifications

• Product Type: Square hole airbrick
• Model: No.351
• Material: High-quality fired clay
• Dimensions: 215mm (L) x 140mm (H) x 65mm (D) approx.
• Colour: Red
• Design: Square perforations for maximum airflow
• Standard: Conforms to BS EN 771-1 for clay masonry products

Benefits

• Efficient Ventilation: Prevents damp, mould, and timber decay by improving airflow.
• Durable Clay Construction: Frost-resistant and weatherproof for long-lasting use.
• Traditional Finish: Red colouring blends perfectly with common brickwork.
• Low Maintenance: Natural clay colourfastness resists fading and requires minimal upkeep.
• Building Regulation Compliant: Suitable for use in UK sub-floor and cavity wall ventilation systems.

Common Applications

• Ventilation for suspended timber floors
• Cavity wall airflow management
• Renovations and restoration projects
• New-build housing and extensions

Why choose clay airbricks over plastic ones?
Clay airbricks, like the No.351, offer superior durability, frost resistance, and an authentic finish that matches brickwork, making them ideal for both functional and aesthetic purposes.