Rectangular dimensions from 6 to 24 inches in half inch increments depending on the circular.
Square to round duct transition solidworks.
Hvacquick custom square to round duct transitions.
Nordfab square to square transitions do not provide the same quality of airflow as rectangular to round and are designed for applications with height restrictions.
Built to order square to round ceiling box transitions.
Available in a wide range of custom dimensions.
20 x 20 x 18 square to round transition item.
Round connections for 4 5 6 8 10 12 or 14 inch diameter duct.