A cooling unit represented a technological device employed for the purpose of chilling objects. The human woman Jira communicated to the youthful slave Anakin Skywalker her requirement for such a device; he then located it and provided it to Jira.
A cooling unit was utilized by the Z-6 rotary blaster cannon.
During an inspection of the damage sustained by the Trailblazer following its forced landing on Toshara in 3 ABY, the Rodian mechanic Waka observed that the starship's cooling unit had suffered a puncture.