Improving ventilation and sealing floors and walls can reduce the presence of radon by up to 50%. These simple changes are generally suitable for controlling low levels of the gas – around 20 Becquerels per cubic meter of air (Bq m³).

However, under floor extract and mini sump fans can reduce radon by 90%. These work by creating lower pressure below floor level which reduces the ingress of radon gas into a building. Any radon gas is sucked out and the vented into the atmosphere through a pipe. This type of installation is suited to houses with solid floors, or those with suspended floors depending on the construction of the floor and existing airbricks.

Airflow under suspended floors also can be increased by installing vents. This method has been proven effective on radon levels of up to 700 Bq m³ and in some cases can be further improved by adding fans to create greater movement of air.
Positive pressure ventilation systems draw radon free air from the loft space, or directly from outside and silently introduce fresh air throughout a building home thereby reducing radon levels. These systems are effective for up to 500 Bq m³ levels of contamination and work better in sealed environments.