Natural ventilation relies on the wind and the "chimney effect" to keep a building cool.
There is a wide variety of indoor pollution contributors - radon, tobacco smoke, household chemicals. Use this guide to evaluate your home.
Regardless of the type or radon test you choose, there are a few steps you need follow to ensure an accurate reading in your home.
Radon causes an estimated 14,000 lung cancer deaths each year. It is the earth's only naturally produced radioactive gas and comes from the breakdown of uranium in soil, rock, and water. You cannot see or smell radon, but it can become a health hazard when it accumulates indoors.