It sums up the area of the surfaces that are designated to be a “floor.” It is up to the user to describe the floor geometry in a way that is consistent with their preferred definition for floor area.
From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of Ke Xu
Sent: Tuesday, January 24, 2012 11:32 AM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: [EnergyPlus_Support] Re: how does E+ calculate the building total floor area?
Thanks for your explaination, Linda.
This means that E+ sums up all floor areas enclosed by the exterial walls outer surface including area occupied by partition walls because they don't have width in the simulation?
--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Linda Lawrie <linda@...> wrote:
>
> From the Zone Field on "part of total floor area":
> Field: Part of Total Floor Area
> This optional field defaults to Yes if not specified. The field is
> used to show when a zone is
> not part of the Total Floor Area as shown in the Annual Building
> Utility Performance Summary
> tables. Specifically, when No is specified, the area is excluded from
> both the conditioned floor
> area and the total floor area in the Building Area sub table and the
> Normalized Metrics sub
> tables.
>
> Remember that walls, partitions, etc in EnergyPlus have zero width.
>
> That said, there is currently a Change Request in the developer team
> about a discrepancy in two reports that report/use floor area.
>
> At 09:06 AM 1/24/2012, Ke Xu wrote:
> >Dear all,
> >Can anyone here explain a little about how E+ calculates a
> >building's total floor area in the output report? I tried to search
> >its definition in the I/O reference, but I can't find it.
> >
> >My understanding is that it accounts for the floor area enclosed by
> >internal surfaces,so it should exclude areas occupied by internal
> >partitions, exterial walls and any vertical penetrations, such as
> >elevator shaft. As a result,
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