Why Spiral Duct Over Rectangular?

Spiral ductwork include efficient air movement and minimal leakage, which can help reduce the energy needs of HVAC systems.

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Spiral duct are lighter (due to thin gauge material), require less joints and hanger cutting both labour and material cost.

The perimeter of round duct is less than equivalent rectangular duct which significantly reduce surface area of ducts for insulation.

Spiral duct normally comes in 3mtr lengths as compare to 1.2mtr lengths for rectangular duct which reducing the number of connections and so easy to seal the duct system.

The hanger distance for round duct is 3mtr as against 2.5mtr for rectangle which reduce no of hanger significantly.

Spiral duct has smooth internal surface and due to its shape produces less airflo resistance than rectangular duct and minimize friction loss.

Aesthetically pleasing outside helical seam of spiral duct looks great when exposed in large open area like mall, transport hub, retails store etc, can be painted to match with interior of structure.

Spiral duct has less joints, less fittings compare to rectangle duct which eliminate the opportunity for leakage by almost half , so overall system become more power efficient.