When installing duct runs, the slope should be no less than how many inches per 100 feet?

When installing duct runs, maintaining an appropriate slope is essential for ensuring efficient airflow and preventing issues such as condensation or pooling of moisture. A slope of at least 3 inches per 100 feet is recommended to facilitate proper drainage and airflow within the duct system. This level of slope allows for gases or air to flow smoothly and helps mitigate any potential blockages that could arise from standing water or condensation.

Choosing this slope ensures that the ductwork operates effectively, as a steeper slope could lead to unnecessary turbulence, while a gentler slope might not be sufficient to avoid moisture-related issues. Properly installed ducts with the correct slope significantly contribute to the overall efficiency and longevity of the ventilation system.