Radon is an odourless, colourless and tasteless gas and there are no immediate symptoms to radon gas exposure that a person will notice. Although there are no symptoms from radon exposure, the radiation released by radon (alpha particles) will immediately damage the DNA of the cells lining the lungs. This damage increases your lifetime relative risk of the only scientifically verified health effects of radon exposure: lung cancer. The only way to know you have radon in you home is to use a Health Canada recommended long term testing device.