Issues

• ADU duct leakage without a return plenum causes excessive supply-airflow reduction through inconsistent return-flow accounting

  TriageUnconfirmedDefect
  NatLabRockies/EnergyPlus#11857 · Filter by author yujiex opened on Oct 9, 2026

• Refrigeration case credits are multiplied by the zone multiplier, but case energy is not

  TriageUnconfirmedDefect
  NatLabRockies/EnergyPlus#11856 · Filter by author eringold opened on Oct 8, 2026

• Generator:FuelSupply Liquid Generic Fuel CO2 Emission Factor is Unused

  TriageUnconfirmedDefect
  NatLabRockies/EnergyPlus#11852 · Filter by author mitchute opened on Oct 6, 2026

• Generator:CombustionTurbine Optimum PLR Field is Unused

  TriageUnconfirmedDefect
  NatLabRockies/EnergyPlus#11847 · Filter by author mitchute opened on Oct 5, 2026

• Complex fenestration: sky and ground diffuse transmittance read the BSDF matrix transposed relative to the beam

  TriageUnconfirmedDefect
  NatLabRockies/EnergyPlus#11831 · Filter by author robertweitl opened on Sep 30, 2026
  1

• ComponentCost:LineItem Unused Fields for Cost per Volume, Cost per Volume Rate, and Cost per Energy Per Temperature Difference

  TriageUnconfirmedDefect
  NatLabRockies/EnergyPlus#11828 · Filter by author mitchute opened on Sep 29, 2026

• CoolingTower:VariableSpeed:Merkel — cell-increment loop exits on a stale FullSpeedFanQdot and never re-solves the fan; tower over-cools at full fan

  TriageUnconfirmedDefect
  NatLabRockies/EnergyPlus#11823 · Filter by author Apichan opened on Sep 29, 2026

• Investigate a way to integrate clang-based tools for EnergyPlus-specific static analysis

  DefectDeveloper Issue
  NatLabRockies/EnergyPlus#11821 · Filter by author jmarrec opened on Sep 28, 2026

• Scheduled/Imported shading: windows absorb no beam solar in the glass (SurfSunlitFracWithoutReveal / SurfSunlitFracHR never set)

  NatLabRockies/EnergyPlus#11820 · Filter by author ryanntannn opened on Sep 28, 2026
  1

• EMS Minute is off at zone-timestep calling points after HVAC substeps; TimeStepsPerHour is always 0

  TriageUnconfirmedDefect
  NatLabRockies/EnergyPlus#11819 · Filter by author matt-tucker opened on Sep 26, 2026

• Missing runtime fraction (RTF) output variable for Coil:Heating:Electric and Coil:Heating:Electric:MultiStage

  NewFeature
  NatLabRockies/EnergyPlus#11817 · Filter by author joseph-robertson opened on Sep 25, 2026
  4

  

• Inconsistent/inaccurate FanPerformance:NightVentilation handling across fan types

  Defect
  NatLabRockies/EnergyPlus#11808 · Filter by author joseph-robertson opened on Sep 21, 2026
  

• Fan:SystemModel ignores Night Ventilation Mode Flow Fraction

  TriageUnconfirmedDefect
  NatLabRockies/EnergyPlus#11798 · Filter by author mitchute opened on Sep 18, 2026
  4

• VAV terminal warns that an ignored minimum-flow field "will be ignored" even when the field carries no user intent (0 or Autosize)

  TriageUnconfirmedDefect
  NatLabRockies/EnergyPlus#11771 · Filter by author eringold opened on Aug 31, 2026
  

• HeatPump:PlantLoop:EIR - calcPowerUsage uses load-side heat transfer instead of reference capacity

  TriageUnconfirmedDefect
  NatLabRockies/EnergyPlus#11764 · Filter by author kevin-moos opened on Aug 21, 2026
  1

  

• Happy Name-iversary, EnergyPlus!

  NatLabRockies/EnergyPlus#11760 · Filter by author Myoldmopar opened on Aug 20, 2026
  4

• Inconsistent Kiva soil defaults

  TriageUnconfirmedDefect
  NatLabRockies/EnergyPlus#11748 · Filter by author shorowit opened on Aug 15, 2026

• epJSON Schema should encode Yes/No fields as an actual JSON boolean rather than a string enum

  TriageUnconfirmedDefect
  NatLabRockies/EnergyPlus#11740 · Filter by author jmarrec opened on Aug 11, 2026

• Erratic unitary system control with MultiSpeed coil and economizer

  TriageUnconfirmedDefect
  NatLabRockies/EnergyPlus#11734 · Filter by author lymereJ opened on Aug 7, 2026

• RoomAir:TemperaturePattern:UserDefined with RoomAirModelType=Mixing causes return air temperature to use default 23°C

  TriageUnconfirmedDefect
  NatLabRockies/EnergyPlus#11719 · Filter by author qqq000feel opened on Aug 1, 2026
  

• CalcCoordinateTransformation sometimes fails unpredictably on very thin horizontal surfaces

  Defect
  NatLabRockies/EnergyPlus#11707 · Filter by author 3Xzz5f opened on Jul 23, 2026
  

• Enhance EMS to Handle Inside and Outside Face Absorptances

  DefectNewFeatureRequest
  Bug

  NatLabRockies/EnergyPlus#11688 · Filter by author RKStrand opened on Jul 14, 2026 · EnergyPlus 26.2 IOFreeze
  2

  

• Inheritance and shadowing issues in HeatPumpAirToWater

  Defect
  NatLabRockies/EnergyPlus#11685 · Filter by author jmarrec opened on Jul 10, 2026
  2

• CMake refactor parent issue

  Developer IssueDoNotPublish
  NatLabRockies/EnergyPlus#11682 · Filter by author jmarrec opened on Jul 10, 2026
  

• Documentation Issues 2026A

  TriageUnconfirmedDefect
  NatLabRockies/EnergyPlus#11661 · Filter by author RKStrand opened on Jun 26, 2026