SACC stands for "Seasonally Adjusted Cooling Capacity". This is a new rating system for portable air conditioners that was effective from 1 July, 2020. It represents the weighted average performance of a portable air conditioner in a number of test conditions, some of which may be more extreme than the average use case, which is then adjusted to account for the effect of infiltration air and duct heat transfer. With the change in testing, the new SACC ratings therefore may appear lower than previous ratings on the unit packaging, even though the model has not changed.