Abstract
The Building Research Establishment recently purchased a house in Devon, UK, which was chosen as being typical of UK construction with a suspended timber floor, and for having high radon levels, averaging 1.6 kBqm −3 and peaking above 6 kBqm −3. This house is being used as a test facility for investigating a host of radon related issues and contains continuous radon monitoring equipment and a network of probes and sensors monitoring various environmental parameters, including temperature, relative humidity, wind data, atmospheric pressure, and a number of pressure differences. Initial results show an extreme variation in radon levels with time, challenging the direct use of short-term monitoring. For this property, forced underfloor extract ventilation is demonstrated as a reliable remedy, more effective than natural underfloor ventilation, whole house pressurization and underfloor supply ventilation. This paper describes the experimental set up and presents some preliminary radon results from the first year of operation.
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