What is the most effective method to reduce indoor radon levels?

Increasing ventilation rates is recognized as one of the most effective methods for reducing indoor radon levels. Radon is a naturally occurring radioactive gas that can accumulate in buildings, especially those that are tightly sealed. By increasing ventilation, fresh outdoor air is brought into the building, which helps to dilute and disperse any radon gas present. This is particularly crucial in areas where radon levels are known to be high.

While sealing cracks in floors and walls can help reduce the entry of radon, it does not address the radon that may already be present in the indoor air and can sometimes create a negative pressure that encourages radon to enter. Air purifiers are generally not designed to filter out radon gas effectively, as they typically target particulates or other airborne contaminants. Lowering indoor temperatures does not have a significant impact on radon levels and can lead to more energy consumption in some cases.

Understanding radon dynamics in indoor environments is essential, and increasing ventilation is a proactive approach that not only lowers radon but also enhances overall indoor air quality.