Horizontal Square to Round Converter for medium and large chassis Goodman GPC and GPH Series dedicated horizontal self contained units. These adapters are designed to be 3 inches wider and 3 inches higher than the opening on the supply side, They are designed to be 5 inches wider and 0.5 inches taller than the opening on the return side of the system. They can still be secured to the flanges and are maufacturered in such a way to allow for a large diameter round duct connection to optimize airflow in the higher capacity systems. 

• Medium and Large Chassis