What is the required minimum horizontal clearance that vent terminals must maintain from doors?

The required minimum horizontal clearance that vent terminals must maintain from doors is 12 inches. This regulation is essential for ensuring that venting systems operate safely and effectively. Maintaining this distance prevents any obstruction or interference that could arise when doors are opened or closed, which might impede the proper venting of gases or fumes.

In addition, maintaining this clearance helps to ensure that any exhaust does not flow directly toward people entering or exiting a building, thereby promoting safety and health. The distance also prevents the potential for backdrafts, where exhaust gases could be drawn back into the structure, reducing the risk of carbon monoxide poisoning or other hazardous conditions. Therefore, adhering to this requirement is crucial for compliance with safety standards set out in the North Carolina Mechanical Code.