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Sustainable design
About EcoDesigner, Energy Evaluation, Life Cycle Assessment, etc.

Zones for energy evaluation

R Muller
I am experimenting with the energy evaluation tool, but can't seem to create appropriate 3-dimensional zones. Are there better tools to manipulate zones?

Can I see and manipulate them in section? (for example, to stretch the height to meet the floor above)

Can I see the zone heights relative to project zero or to a story level instead of each zone having a height only relative to its base?

Is there a preferred way to crop a zone to match slabs and roofs in my model? Design/ roof extras? SEO operations?

Once a zone is cropped, is there any way to undo the crop?

Help!! I am just about ready to give up on the energy evaluation because the zones seem so difficult. I am working on a 4-story residential building on a hillside.
R Muller
AC 26 USA (20+ years on ArchiCAD)
MBP 64GB Apple M1 Max OS 12.1 Monterey
Not applicable
strawbale wrote:
Ive attached an image showing my model, all the walls are shown as not included in the zones, is this correct? Or do I need to change the zones so that in the model reveiw they extend to include the building envelope?
you dont have to select walls with your zones...
if you select them too then you will have wrong Volume,Area etc parameters

these are used for 2 different inputs
zones will give you all needed information about volume, area etc
walls will give you U parameter or like US folks like to says R of your building envelope...

So, build your zones to fill interior of room
Not applicable
Thanks Necko, much appreciated. Makes sense I guess.
Not applicable
I am just going through all the videos, guides, user guides, etc to see if I can get a basic understanding of the Energy Evaluation feature of AC 17. So far, a lot of questions and problems.

The major issue is zones. One minute they are okay, then on another try, it lists a number of "offending" zones. I fix these, and then another series of zones appear. It seems that the modeling system is never happy with all the room zones. I have tried the three different techniques for zones, polylines, etc. Still problems. Has anyone successfully manages to have "happy zones" all around?

Secondly, I have some basic questions in terms of approach. Is it really better to set up wall composites that automatically calculate thermal qualities of a wall? or to override this and just assign your own, based on calculations from a separate spreadsheet? I have been using more generic walls, rather than composites, but may need to go that direction all the way.

Another question is whether you need to assign thermal performance values to interior walls between spaces. (I think not, unless the interior wall is between two thermal zones, but am not sure).

If you draw a polyline inside a space to define the boundary (in cases where there is no contiguous surrounding wall), does the zone reflect the depth of penetration of doors and windows?

If a material that is part of your project (wall composite) is not in the "catalog" of materials, can the catalog be amended?

I have been trying to find an up-to-date user guide, to no avail. The videos are somewhat helpful, but not in terms of overall approach.

If anyone is willing to spend a bit of time answering questions by phone, I would appreciate it as well.