Which type of radon mitigation is considered more effective in high radon areas?

Active soil depressurization is considered the more effective radon mitigation method in high radon areas because it actively reduces radon levels by creating a vacuum beneath the foundation of a building. This system utilizes a fan to pull radon gas from the soil and vent it safely outside, thereby preventing it from entering the living space.

In areas where radon levels are significantly high, simply sealing openings or using passive systems may not be sufficient to lower radon concentrations to acceptable levels. Sealing all openings can help minimize radon entry but does not address ongoing radon production from the soil. Passive systems rely on natural air flow, which may not be effective enough in areas with high radon levels, since they do not mechanically enhance radon removal.

Ventilation systems can improve indoor air quality and may help dilute radon levels, but they may not be as effective as active soil depressurization in directly reducing the pressure difference and actively preventing radon from infiltrating the home. Overall, active soil depressurization stands out as the most reliable method for effectively mitigating radon in high radon areas.