Radon testing is to measure the picocuries (pCi/L) found in the air of your home.
For a valid test result, the test must be performed under Closed House Conditions, for 12 hours before the test and during the exposure period.
The test should be performed in the lowest area of the home, that could be used regularly. E.g. bedroom, play area or workshop.
The test device should be left in place for at lest 48 hours. Once completed it should be sent back for analysis straight away or the results could be invalid!