Issue overview

From user: Attached (240819_Base EEM.idf) is a modified version of the prototype building ASHRAE901_ApartmentMidRise_STD2022_NewYork.idf

The most significant change to the file is that each zone now contains one space.

Many of the surfaces in this building have "ZONE" selected as the :outside_boundary_condition

This file has space listed as :outside_boundary_condition_objects. The error file (also attached - 240819_Base EEM.err)

The error file gives a repeated warning that is incorrect:

** Warning ** GetSurfaceData: CAUTION -- Interspace surfaces are usually in different spaces
** ~~~ ** Surface=G SIWALL N1A, Space=FLOOR 1 G N1 APARTMENT, Zone=G N1 APARTMENT
** ~~~ ** Surface=iz-G SIWALL N1A, Space=FLOOR 1 G N1 APARTMENT, Zone=G CORRIDOR

In 240824_Base EEM.idf - each surface is assigned both to the Zone and to the Space. In 240824_Zone_Base EEM.idf each surface is assigned just to the Zone. There are significant differences in the heating and cooling energy use just from making this change, which does not seem appropriate.

The results from 240824_Zone_Base EEM.idf more closely match the results from the original file.

Details

Some additional details for this issue (if relevant):

• Platform (Operating system, version)
• Version of EnergyPlus (if using an intermediate build, include SHA)
• Helpdesk ticket number 16745 and 16746

Checklist

Add to this list or remove from it as applicable. This is a simple templated set of guidelines.

• Defect file added to EnergyPlusDevSupport\DefectFiles
• Ticket added to EnergyPlus Defect Complexity (Github Project)
• Pull request created (the pull request will have additional tasks related to reviewing changes that fix this defect)