Answer: 

Conducting a short-term test is better than not testing at all, but because the levels of radon in your home vary over time, a longer-term test will give you a more accurate result. A test conducted over at least three months is recommended, and preferably between September and April when the windows are mostly closed.

Answer Author: 
Erica Phipps
Answer Author's Email: 
erica@healthyenvironmentforkids.ca