Round Sheet Metal Duct Used in HVAC

Round and oval sheet metal duct properties:

- They have lower initial installed costs than rectangular duct.

- Their shape results in lower pressure drops, thereby requiring less fan horsepower to move the air and, consequently, smaller equipment.

- The shape also has less surface area and requires less insulation when externally wrapped.

- The smaller surface areas of round and oval allow less heat loss or gain and are therefore more energy efficient.

- Seams and joints are more tightly sealed resulting in less leakage and wasted energy.

- The acoustic performance of round and oval duct is superior because their curved surfaces allow less breakout noise. In practice, fixing a noise problem in rectangular ductwork is more difficult than in round ductwork.

Round sheet metal ducts not only perform better, they also look better. Many architects and designers are using the aesthetically pleasing shapes of round and oval as unique and integral elements in their designs.

Round and oval sheet metal ducts promote healthier indoor environment. There is less surface area, no corners and better airflow reduce the chance of dirt and grime accumulating inside the duct and becoming a breeding ground for bacterial growth.