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Sizing:System fixes and docs updates#11431

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joseph-robertson wants to merge 2 commits intodevelopfrom
sizing-obj-fixes
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Sizing:System fixes and docs updates#11431
joseph-robertson wants to merge 2 commits intodevelopfrom
sizing-obj-fixes

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Pull request overview

Description of the purpose of this PR

Pull Request Author

  • Title of PR should be user-synopsis style (clearly understandable in a standalone changelog context)
  • Label the PR with at least one of: Defect, Refactoring, NewFeature, Performance, and/or DoNoPublish
  • Pull requests that impact EnergyPlus code must also include unit tests to cover enhancement or defect repair
  • Author should provide a "walkthrough" of relevant code changes using a GitHub code review comment process
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  • If changes fix a defect, the fix should be demonstrated in plots and descriptions
  • If any defect files are updated to a more recent version, upload new versions here or on DevSupport
  • If IDD requires transition, transition source, rules, ExpandObjects, and IDFs must be updated, and add IDDChange label
  • If structural output changes, add to output rules file and add OutputChange label
  • If adding/removing any LaTeX docs or figures, update that document's CMakeLists file dependencies
  • If adding/removing any output files (e.g., eplustbl.*)
    • Update ..\scripts\Epl-run.bat
    • Update ..\scripts\RunEPlus.bat
    • Update ..\src\EPLaunch\ MainModule.bas, epl-ui.frm, and epl.vbp (VersionComments)
    • Update ...github\workflows\energyplus.py

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  • Perform a Code Review on GitHub
  • If branch is behind develop, merge develop and build locally to check for side effects of the merge
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  • If feature, test running new feature, try creative ways to break it
  • CI status: all green or justified
  • Check that performance is not impacted (CI Linux results include performance check)
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  • Check any new function arguments for performance impacts
  • Verify IDF naming conventions and styles, memos and notes and defaults
  • If new idf included, locally check the err file and other outputs

@joseph-robertson joseph-robertson self-assigned this Feb 24, 2026
\paragraph{Field: Fraction of Autosized Heating Design Capacity}\label{field-fraction-of-autosized-heating-design-capacity}

Enter the heating capacity as a fraction of the autosized heating capacity. This input field is required when the Heating Design Capacity Method is \emph{FractionOfAutosizedHeatingCapacity}. This input field may be left blank if a heating coil is not included in the zone HVAC equipment or the Heating Design Capacity Method is not \emph{FractionOfAutosizedHeatingCapacity}. The program calculates the heating capacity from the design autosized cooling capacity and user specified fraction. Design day sizing run must be specified.
Enter the heating capacity as a fraction of the autosized heating capacity. This input field is required when the Heating Design Capacity Method is \emph{FractionOfAutosizedHeatingCapacity}. This input field may be left blank if a heating coil is not included in the zone HVAC equipment or the Heating Design Capacity Method is not \emph{FractionOfAutosizedHeatingCapacity}. The program calculates the heating capacity from the design autosized heating capacity and user specified fraction. Design day sizing run must be specified.
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"Heating", right?

\paragraph{Field: Fraction of Autosized Cooling Design Capacity}\label{field-fraction-of-autosized-cooling-design-capacity-1}

Enter the cooling capacity as a fraction of the autosized cooling capacity. This input field is required when the Cooling Design Capacity Method is \emph{FractionOfAutosizedCoolingCapacity}. This input field may be left blank if a cooling coil is not included in the zone HVAC equipment or the Cooling Design Capacity Method is not \emph{FractionOfAutosizedCoolingCapacity}. The program calculates the cooling capacity from the design autosized cooling capacity and user specified fraction. Design day sizing run must be specified.
Enter the cooling capacity as a fraction of the autosized cooling capacity. This input field is required when the Cooling Design Capacity Method is \emph{FractionOfAutosizedCoolingCapacity}. This input field may be left blank if a cooling coil is not included in the airloop or the Cooling Design Capacity Method is not \emph{FractionOfAutosizedCoolingCapacity}. The program calculates the cooling capacity from the design autosized cooling capacity and user specified fraction.
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None of the other fields had "Design day sizing run must be specified"; copy-paste error?

(This is Sizing:System. Should it mirror DesignSpecification:ZoneHVAC:Sizing?)

\paragraph{Field: Fraction of Autosized Heating Design Capacity}\label{field-fraction-of-autosized-heating-design-capacity-1}

Enter the heating capacity as a fraction of the autosized heating capacity. This input field is required when the Heating Design Capacity Method is FractionOfAutosizedHeatingCapacity. This input field may be left blank if heating coil is not included in the airloop or the Heating Design Capacity Method is not FractionOfAutosizedHeatingCapacity. The program calculates the heating capacity from the design autosized cooling capacity and user specified fraction.
Enter the heating capacity as a fraction of the autosized heating capacity. This input field is required when the Heating Design Capacity Method is \emph{FractionOfAutosizedHeatingCapacity}. This input field may be left blank if a heating coil is not included in the airloop or the Heating Design Capacity Method is not \emph{FractionOfAutosizedHeatingCapacity}. The program calculates the heating capacity from the design autosized heating capacity and user specified fraction.
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"Heating", right?

@mitchute mitchute added the Defect Includes code to repair a defect in EnergyPlus label Feb 24, 2026
bool errorsFound = false;
HeatingCapacitySizer sizerHeatingCapacity;
sizerHeatingCapacity.overrideSizingString(SizingString);
state.dataSize->DataFracOfAutosizedHeatingCapacity = heatingCapacityMultiplier;
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Variable heatingCapacityMultiplier was suspiciously assigned but unused previously.

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Fraction of autosized heating design capacity not applied to AirLoopHVAC:UnitaryHeatCool

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