What is the minimum cylindrical clearance space required for an ASD fan installation?

The minimum cylindrical clearance space required for an ASD (Active Soil Depressurization) fan installation is 21 inches in diameter. This dimension is critical to ensure that there is sufficient space around the fan for efficient operation, maintenance access, and to allow for adequate airflow. Proper clearance helps minimize the risk of obstruction which could impede the fan's performance.

Having the right clearances also supports the longevity of the equipment by preventing overheating and ensuring proper air circulation, which is vital for the fan's functionality in mitigating radon levels effectively. This clearance is established in guidelines and codes to ensure safe and efficient operation within the environment where radon mitigation systems are deployed.