What we do
Air Leakage Testing Ltd undertake air flow measurements of background extraction ventilation for Approved Document F requirements.
Ventilation is key in controlling moisture and pollutant levels in any building, if the ventilation is not sufficient it can lead to an unpleasant living environment and in the longer-term problems with the building and/or health issues.
Although extract vents claim a level of air flow based on laboratory testing this does not guarantee they will achieve this in practice due to various issues but most commonly the installation. Therefore, Approved Document F (Ventilation) requires background ventilation to be tested after installation meets the requirements, for example for intermittent extraction:
30 litres/second (when fitted adjacent to the cooker hob, this increases to 60 litres/second when fitted away from the cooker hob).