Hi John,
From the screenshot the vast majority of the gain is solar load, so I imagine there is glazing in this room? (If so, and if you wished to test, I would suspect that if this glazing was temporarily deleted this value would drop significantly).
The article below should also assist with clarifying load types:
CIBSE Gain Calculation - Load types - Hevacomp Wiki - Hevacomp - Bentley Communities
Regarding the casual load varying; you may have enabled a profile - if you wish a constant value then please ensure to untick the profile option as below:
Alternatively, you may just be seeing the hours of occupancy - the casual load will be applied to occupied hours only - ie as entered in the below:
Hope that helps to clarify.
Shane Regan | Principle Building Performance Support EngineerHevacomp to OpenBuildings - A complete guide for every user | Bentley Communities
Answer Verified By: John Moloney
Thanks for clarifying that Shane. I did indeed have the use profile box ticked for occupancy. I understand the convective and latent load are now resulting from air infiltration.
Kind regards,
John
Great, glad to hear that helped. If you need anything else just let us know.
Regards,
Shane