Cleanouts in horizontal ducts should be installed on which side of the duct?

In the construction and maintenance of ductwork, the positioning of cleanouts is crucial for ensuring that the ducts can be adequately maintained and cleared of debris. Cleanouts provide access for cleaning and inspection, which is essential for the safety and efficiency of the HVAC system.

Installing cleanouts on the top side of horizontal ducts is recommended because this position allows for easier access during routine maintenance. It is more practical; technicians can perform their work without obstruction, and this orientation helps in effectively removing any accumulated debris or condensation that may collect in the duct system.

If cleanouts were positioned on the bottom side or side faces, accessing them might require awkward positioning or additional modifications to the ductwork, making maintenance more challenging. Additionally, cleanouts on the bottom side could potentially lead to liquid accumulation, which can foster mold growth or other issues. Therefore, placing them on the topside ensures that they are functional and accessible, promoting a more efficient maintenance process.