To replace 2 standard bricks 2 high x 1 long, this high flow vent gives 13,400 Sq mm of ventilation. This can replace standard terracotta vents of the same size and increase ventilation by around 4 times. When set out in good cross flow pattern can improve sub-floor ventilation and help reduce fungi and mould, timber decay, reduce the risk of termite attack and cupping of timber floors.

Decorative cement surround with corrosion resistant full brass mesh insert. The 11mm x 11mm mesh hole size keeps vermin out.

• Replaces 2 standard bricks 1 wide x 2 high
• Can replace standard Terracotta 230 x 160 vent and give 4 times the ventilation
• Increasing sub-floor ventilation can help with musty smells and mould inside
• Good cross flow ventilation can help reduce cupping of floor boards and timber decay
• 13,400 Sq mm of ventilation per vent