Testing is simple and only takes 48 hours for a short-term computerized test. This test is ideal if you want an idea of what the level may be. The radon test should be performed on the lowest floor of the house that is lived in as habitable space. In other words the test would not be done in a root cellar or crawl space.
To get a true radon level reading a long-term test should be conducted. This test would record and analyze the radon levels over a period of 90 days, giving you a true average.
Where testing has revealed an average of 3.9pCi/L or higher, reduction will be recommended as beneficial. A level of 2pCi/L can be found in many homes and should not be considered a problem.
Before testing can begin all the windows and exterior doors in the house must be kept closed for 24 hours. During the test period these doors can be used normally, but must be closed as soon as entered.
- Windows must not be opened.
- Doors to the basement must be kept closed.
- Whole house fans may not be operated.
- The heat or A/C should be operated normally.
Any tampering with, covering or moving of the testing computer is detected and recorded by the computer. Excessive opening of doors and windows, or ventilating by other means in an effort to reduce the radon level reading is also recorded by the computer.
Should the test results indicate that the results are questionable, the test will need to be done again using stricter monitoring methods and security seals on doors, windows and heating and air conditioning controls.
NOTE: If foggy conditions existed during the testing period it would be wise to have the test time extended. Fog will reduce the radon level.
