Can an additional head be ordered with the 18,000 unit?

Thank you for your question. This system is a single zone system, so it is only equipped for one head. However, if you are in need of a Fujitsu system with two indoor air handlers, we do have dual zone Fujitsu systems available. If you need more than two zones, we also have those available as well. To view our dual zone Fujitsu systems, please follow this link: https://hvacdirect.com/brands/fujitsu-mini-splits/fujitsu-dual-zone-mini-splits/filter/wall-mounted.html

For more assistance please give us a call.