The Furrion 18K Chill Cube rooftop AC unit you ordered is a non-ducted design, meaning it is built to distribute air directly without internal ductwork. However, the air distribution box (ADB) you have, the Furrion 18K Chill Cube Ducted Air Distribution Box with remote, is designed to connect to ductwork inside your RV and distribute air through ceiling ducts.

These components are compatible in the sense that the non-ducted AC unit can connect to the ducted ADB, allowing you to use ducted airflow within your RV. The AC unit provides the cooling, while the ducted ADB manages air distribution through ductwork. Therefore, you do not necessarily need to order a separate fully ducted AC unit to achieve ducted air distribution.

If the AC unit has already shipped and you have the ducted air distribution box, you can proceed with installation as planned. If you prefer a fully ducted AC unit for other reasons, you may order the correct model and return the non-ducted one after delivery. Otherwise, your current setup will work for ducted airflow in your RV.