Certified Engineering specializes in the manufacturing of round spiral duct, flat oval duct, and fittings. Using state-of-the-art equipment, our mechanics are skilled and trained to provide the highest quality service and craftsmanship. Our customer service goes above and beyond, striving for a timely turnaround on all shipments of our round ductwork. In most cases we will be able to provide with the products as customer has requested or we manufacture & provide to customer.
