A brick perforated with small holes for ventilation.
- Buy sandbags or floorboards to block doors and airbricks and remember to ensure there is adequate ventilation.
- Passive systems are less effective and, although they have no moving parts to wear out, may still go wrong: airbricks blocked by vegetation, for example.
- Fill gaps around pipes, but be careful not to block airbricks.
For editors and proofreaders
Line breaks: air|brick
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