What condition is required for the building's temperature during a short-term radon test?

For a short-term radon test to yield accurate results, maintaining the building's temperature within the specified range of between 65-80°F is essential. This temperature range helps to ensure that the conditions are representative of typical occupancy and minimizes variations in radon levels that can occur due to extreme temperature differences. When temperatures are too low or too high, it can potentially affect the air density and the movement of radon gas, leading to unreliable readings.

Maintaining this temperature also mimics normal living conditions in homes, which is crucial for understanding the potential radon exposure occupants might face. Therefore, keeping the test environment within the correct temperature range ensures that the readings reflect a more accurate and consistent level of radon concentration during the testing period.