Are there couplers available to connect more than one line set to gain the length I would need to install this unit? I would need to join a 15ft and a 25ft line together.

Yes — you can connect two pre-charged line sets (like a 15 ft + 25 ft) together using specially-made couplers so you gain the extra length you need without brazing or vacuuming refrigerant yourself (which typically isn’t recommended unless you’re a trained HVAC tech)

If you have any further questions, please call us and we will be happy to assist you.