If radon levels are high, it's time to explore mitigation options. When installed and maintained properly, residential radon mitigation techniques are very effective at reducing radon levels in the home. Radon reduction systems can be installed at the time of construction or many years after construction. Post-construction techniques will vary depending on the home's design and radon test levels, but they all involve preventing the gas from entering the home as much as possible. How does radon mitigation work? The primary technique for reducing radon gas is through a ventilation system. This is accomplished by collecting the radon from beneath the building before it can enter. Radon Mitigation is a proven, cost effective, and reliable technique for radon reduction. Operating costs of the fans are minor due to their low power. Despite starting underneath the foundation, this type of residential radon mitigation does not require significant changes to the home.