How far must the bottom of the duct termination be above the areaway bottom?

The requirement that the bottom of the duct termination be at least 12 inches above the bottom of the areaway is rooted in safety and functionality considerations outlined in the North Carolina Mechanical Code. This height ensures that the duct is positioned high enough to prevent any potential accumulation of water or snow that could lead to blockages or water infiltration into the ventilation system.

Additionally, this elevation helps to minimize disturbances from surrounding debris and enhances the efficient operation of the system by facilitating proper air flow. By maintaining this standard, the system is safeguarded against environmental factors that could compromise performance or lead to code violations.

This height is a critical aspect of proper duct installation, ensuring that ventilation systems function effectively while adhering to safety regulations.