Flat oval duct is machine-made from round spiral lockseamed duct. The oval shape produces less of a flat surface therefore making it less susceptible to vibration than rectangular ducts which reduces the need for rod and angle iron reinforcement.
About ECCO
ECCO Heating Products Ltd. was incorporated in 1960 with the vision of becoming the best in sheet metal manufacturing as well as the distribution of Heating, Ventilation, Air Conditioning (HVAC) and related products.