• For background room ventilation.
• As a plastic component this item is not suitable for use within the external walls of high-rise buildings requiring non-combustible materials.

Plastic, telescopic cavity liner set, compliant with BS 5250.

Features and benefits:

• Telescopic cavity liner contains a system of internal baffles to reduce light and draughts.
• Internal hit and miss grille manually adjusted with an easy sliding action, giving control over the amount of ventilation let into the room.
• External water baffles prevent transfer of water across the cavity.
• Air brick and hit and miss grille UV stabilized to slow down the effects of sunlight.
• Cowled option available to protect against excessive weather conditions and alleviates air blasts through the cavity.
• BRE verified equivalent area.

Components:

• Multifix® Air Brick.
• AirLiner®.
• Hit & Miss Grille.
• Cowl.