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Flat Oval Duct and Fittings
The Flat Oval Duct combines the low-profile design of rectangular ducts with the airflow efficiency of round ducts, making it an excellent solution for projects with limited ceiling space or aesthetic requirements.
It is fabricated from galvanized or stainless steel sheets that are rolled and formed into an oval cross-section, offering smooth airflow, reduced pressure drop, and an attractive appearance for exposed installations.
Flat oval ducts are ideal for HVAC systems in commercial and industrial environments where space constraints, air performance, and visual appeal are key considerations.
Key Specifications
Material: Galvanized Steel / Stainless Steel / Aluminum
Size Range: Equivalent to Ø100–1600 mm round ducts
Thickness: 0.5–1.2 mm
Standard: SMACNA / DW144 / ISO 9001
Connection: Flange / Slip Joint / Coupling System
Key Features
Space-Saving Design
The flat oval shape fits easily into tight ceiling spaces or underfloor areas while maintaining high airflow capacity comparable to round ducts.
Improved Airflow Efficiency
With fewer sharp corners and smoother surfaces than rectangular ducts, flat oval ducts offer lower pressure loss and quieter operation.
Strong and Aesthetic Construction
Manufactured from high-quality galvanized or stainless steel, the ducts are both durable and visually appealing—suitable for exposed ceiling installations.
Custom Fabrication
Available in a variety of diameters, aspect ratios, and connection systems to meet specific architectural and mechanical design requirements.
Technical Specifications
| Material | Galvanized Steel (G90 / DX51D+Z), Stainless Steel, or Aluminum |
|---|---|
| Shape | Flat Oval (Elliptical Cross-Section) |
| Size Range | Equivalent to Ø100–1600 mm round ducts |
| Thickness | 0.5–1.2 mm |
| Connection Type | Flange / Slip Joint / Coupling / Clamp |
| Surface Finish | Zinc Coated / Powder Coated / Painted |
| Standard Length | 1000–1500 mm |
| Standards | SMACNA / DW144 / ISO 9001 |
| Application | Supply Air, Return Air, Exhaust, and Fresh Air |
Applications
Flat oval ducts are commonly installed in modern HVAC systems where both performance and aesthetics matter.
They are suitable for:
They are suitable for:
Material & Manufacturing Process
Flat oval ducts are produced using advanced automatic forming and welding lines. Round spiral ducts are flattened into an oval shape using specialized rollers and calibrated for precise cross-sectional geometry.
