Can I pair the condenser with a 18,000 BTU ducted system and a 18,000 BTU ductless system as I want to use duct?

Thank you for your question. This particular mini split system includes the condenser and two wall mounted air handlers. The condenser for this system cannot be paired with a traditional ducted system. We do have mini split systems available that allow you to customize them. With the design your own system, you could select a concealed duct air handler and a wall mounted air handler. To view this dual zone design your own system click here. With this design your own system you can select which BTU you require. You can even mix and match the available air handlers. We also have mini split heat pump systems that can be inserted into your current ductwork. To view these Inverter heat pumps click here. For more assistance, please give us a call.