What is the minimum clearance for a draft hood relief opening from any surface other than the draft hood it is connected to?

The minimum clearance for a draft hood relief opening from any surface other than the draft hood it is connected to is specified as 6 inches. This requirement is based on safety and performance considerations in gas venting systems. The clearance helps ensure that the draft hood can function effectively without obstruction, which is essential for proper exhaust flow. This distance allows for adequate airflow around the relief opening, reducing the risk of backdrafts or blockages that could lead to inefficient venting and potential safety hazards. Maintaining this minimum clearance is crucial for the safe operation of gas appliances, ensuring that any combustion byproducts are expelled safely and effectively.