channelduct

Channelduct refers to a channel-shaped air distribution duct used in heating, ventilation, and air conditioning (HVAC) systems. It is designed for low-profile installation in spaces with limited plenum height or along walls and ceilings. Channelduct can be formed as a straight or curved channel made from metal or molded plastic, with perforations or slots along its length to release or mix air. End connections commonly attach to plenums, standard round or rectangular ducts, or diffusers via adapters. The term may also describe branded product lines offered by different manufacturers.

Construction and materials: Typical channelduct is fabricated from galvanized steel, aluminum, or coated steel, and may be insulated for thermal and acoustic performance. Perforations or slots are sized to balance airflow and noise. The duct may be finished to blend with interior conditions and can be integrated with dampers or balancing devices at inlets or outlets. Finishes range from plain metal to painted or coated surfaces.

Applications: Channelduct is used in spaces where conventional round ducts would be impractical or visually intrusive. It is common in hotels, offices, healthcare facilities, and retrofit projects, often installed in wall cavities, ceiling plenums, or raised floor systems to deliver or collect air along a linear path.

Performance and considerations: The low-profile cross-section enables installation closer to walls and can provide more uniform air distribution at lower operating velocities, potentially reducing noise. Design must consider pressure drop, leakage, thermal and acoustic insulation, cleaning access, and compatibility with diffusers, grilles, and dampers. Terminations and transitions should be carefully detailed to maintain performance.

Related terms include air duct, linear slot diffuser, plenum, and general HVAC ductwork.