Rectangular Ducts

Rectangular ventilation ducts are one of the most commonly used forms in HVAC (heating, ventilation, and air conditioning) systems, especially in commercial and industrial buildings. Their shape allows for easier adaptation in confined spaces, such as above suspended ceilings or along walls, where round ducts may not be practical.

One of the main advantages of rectangular ducts is their flexibility in design. They can be manufactured in various dimensions (width and height), making them suitable for different airflow rates and specific project requirements. However, compared to round ducts, they create more resistance to airflow due to their corners, which can affect energy efficiency if not properly designed.

The installation of rectangular ducts requires special attention to joints and structural supports. Due to their flat surfaces, they are more prone to deformation under high air pressure, so reinforcements (stiffeners) are often used. It is also important to ensure that joints are airtight to prevent air leakage.

In terms of maintenance, rectangular ducts are relatively easy to clean because of their shape, but they require regular inspections to check for dust buildup and structural damage. A well-designed and properly maintained system helps improve indoor air quality and increases the overall efficiency of the building.

They can be manufactured from galvanized sheet metal or stainless steel. Thicknesses typically range from 0.6 mm up to 1.2 mm, depending on the dimensions.

The most standard dimensions can be found in the table below: