CIBSE Gain - Explanation of Calculation Results Summary

RE: CIBSE Gain - Explanation of Calculation Results Summary

Shane Regan — Mon, 14 Feb 2022 16:43:41 GMT

Hi John,

Great, glad to hear that helped. If you need anything else just let us know.

Regards,

Shane

RE: CIBSE Gain - Explanation of Calculation Results Summary

John Moloney — Mon, 14 Feb 2022 15:03:50 GMT

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

RE: CIBSE Gain - Explanation of Calculation Results Summary

Shane Regan — Mon, 14 Feb 2022 14:52:29 GMT

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.