Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
What is the supply air temperature? And is the building in a humid climate?
If the coil outlet air temperature is a typical 12.8C / 55F, which is common for system type 4, and the building is in a humid climate, then the system will probably have significant latent cooling just because it's cooling the outdoor air lower than the dewpoint.
Example psychrometric chart:
