These sheet metal adapters convert the square supply and return to round which will accommodate round flexible duct.
Note: We may supply an adapter collar for your size flex.
Note: We may supply an adapter collar for your size flex.
Bosch horizontal square to round adapter kit (PCH-8, SQRPGH102) for BRBA R410A & BPBA R454B package units. Designed for horizontal installs, ensuring proper airflow and easy duct transitions from rectangular to round ductwork.
