No matter where you are, if you turn on a Geiger counter, you’re going to hear a steady but infrequent pattern of clicks. This is termed background radiation and is completely normal. It is what’s found in the environment and comes from natural sources like cosmic radiation and naturally occurring materials such as radium or radon.
Rocks such as limestone, granite, and shale degrade slowly over time, releasing naturally-occurring radiation such as radon. It’s when radon levels exceed norms that you have a problem that needs attention.
Are you on the market for a new HVAC system? Concerned about which make and model is right for you? You’ll want to make sure that you choose wisely, since that’s a 12-15 year investment and certainly not one that you should make lightly.