IES-VE User Forum

I recently opened a model that was achieving BREEAM excellent. The model hadn't been looked at since december and as result had to be updated inline with the new version of IES.

I re-ran the compliance calcs after changing nothing but lighting values and now the TER has dropped significantly and we do not achieve the 25% improvement for BREEAM excellent. the new Part L update does not come into effect until April so it can not be that.

I should note that when i re-run the section 6 calcs the TER is the same.

Any ideas what has caused the change, I have went from a fairly high TER of around 47 down to 25.

I am fairly confident this is related to the upgrade of the templates as nearly all my templates were shown to have been upgraded.

Any ideas what has caused this?

Are you using SBEM? I had the same

See the following post

If you weren't using VE-SBEM then the you may have came across a known issue where NCM data was being corrupted. See the known issues post, this was fixed with Hotfix 3 which is available to download from the website.