What is the required makeup air vent size for a closet housing a gas dryer?

The required makeup air vent size for a closet housing a gas dryer is determined by building codes and manufacturer specifications, which often require that sufficient air be supplied to ensure proper combustion and safe operation of the dryer.

In general, a gas dryer needs an adequate supply of air to function efficiently. The recommended vent size for makeup air typically ranges from 100 square inches, which allows for optimal airflow and combustion. This ensures that the dryer can operate without creating negative pressure in the closet that could potentially pull in harmful gases.

While other sizes may be appropriate under different circumstances or for different appliances, 100 square inches is commonly accepted as the standard figure for gas dryers. This size strikes a balance between ensuring enough air for combustion while maintaining a manageable design in terms of structural integration with the closet space.

Therefore, specifying 100 square inches for the makeup air vent is aligned with safety guidelines and operational needs for gas dryers in enclosed spaces like closets.