What are the suggested discharge points for ASD according to ANSI/AARST requirements?

The suggested discharge point for active soil depressurization (ASD) systems, according to ANSI/AARST requirements, is above the roof eave. This is critical for several reasons.

Discharging above the eave ensures that any radon gas or other vapors are effectively vented away from the structure and living space. By directing the discharge upwards, it allows for better dilution and dispersion of the gases in the outdoor atmosphere, minimizing the risk of radon re-entering the building. This height also helps to prevent any potential hazards that could arise from the accumulation of these gases at ground level, which is especially important in areas with high radon concentrations.

Discharging at this height also adheres to building codes and standards, which aim to enhance safety and ensure that mitigation systems perform effectively. Consequently, positioning the discharge point above the roof eave is recognized as best practice within the industry, aligning with the goal of reducing radon exposure in occupied spaces.