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Short- and Long-Term Testing
Short-Term (3-7 days)
- Gives a “snapshot” of the radon concentrations under “worst case” conditions at the time of the sampling.
- Provides an indication of radon potential. This method is used in real estate transactions and to provide a cursory idea of the radon potential.
- Test performed under normal living conditions.
Long-Term (90-360 days)
- Determines radon levels of the building as used by its occupants.
- Determines average radon levels over longer periods of time under “normal living conditions” for the building with those occupants.
- Test requires “closed house” conditions, where building is closed except for normal entry/exit.
Download a comparison spreadsheet providing more details about both methods.
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