The results of a radon measurement should reflect the average radon exposure over a year. The results of a short-term test can be unreliable due to the many variables that can affect a test. That is why in Canada, Health Canada’s guidelines recommend a long-term radon test lasting at least 91 days. Long-term radon testing can be conducted using a DIY radon test kit. The best long-term device in the market is the Accustar Alpha Track radon detector. We offer this detector as part of a DIY test kit that you can use to test your home.