Mini Splits are Capable of Using Fewer Indoor Units than the Outdoor Unit’s Zonal CapacityUpdated a day ago
Can I Use a Mini-split System with Fewer Indoor Units than the Outdoor Unit's Zonal Capacity?
Yes. You can install and run fewer indoor units than the outdoor unit's zonal capacity for a multi-zone condenser. You can leave the remaining zones closed and reserved for a later time without any negative impacts.
For instance, you can run two units on a triple-zone condenser now and use the third zone later.