How to reduce levels of radon gas

The results of field trials - closely monitored by scientists from Bristol University - in six radon contaminated houses in Street, Somerset, show that for dwellings with a contamination level of 200-1000 Becquerels per cubic metre (Bq/m3), installation and operation of a Nu-Aire DriMaster-R whole house ventilation system can reduce radon levels by an average factor of four to five - to well below the National Radiological Protection Board (NRPB) recommended safety level of 200 Bq/m3. For dwellings with a contamination level greater than 1000 Bq/m3, the DriMaster-R still provides a low-cost method of reducing even these high radon levels. (author)