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## OpenStudio-ERI v1.13.0
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__Features__
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__Bugfixes__
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## OpenStudio-ERI v1.12.0
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__New Features__
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__Features__
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- Updates to OpenStudio-HPXML 1.12/OpenStudio 3.11/EnergyPlus 25.2.
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- Updates to HPXML v5.0-rc1.
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-**Breaking change**: HPXML namespace changed from http://hpxmlonline.com/2023/09 to http://hpxmlonline.com/2025/12.
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## OpenStudio-ERI v1.11.1
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__New Features__
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__Features__
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-**Breaking change**: Clothes dryers now require `Vented` (true or false) to be provided per ANSI/RESNET/ICC Standard 301-2022 Addendum C.
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## OpenStudio-ERI v1.11.0
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__New Features__
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__Features__
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- Updates to HPXML v4.2.
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- Updates shared pump power for ground-source heat pumps on a shared recirculation loop to cycle with heating/cooling load rather than operate continuously per RESNET HERS Addendum 94.
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- Adds RESNET HERS Addendum 77 to adjust HPWH performance when installed in confined space, used when ERI version is "latest".
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## OpenStudio-ERI v1.10.0
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__New Features__
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__Features__
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- Updates to OpenStudio 3.10/EnergyPlus 25.1/HPXML v4.2-rc2.
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-**Breaking change**: ERI version of "latest" now includes RESNET HERS addenda not yet incorporated in ANSI 301.
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- Adds RESNET HERS Addenda 81 and 90f for "latest" (updates calculations for dishwashers, clothes washers, fixtures, and hot water waste).
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## OpenStudio-ERI v1.9.4
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__New Features__
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__Features__
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- Adds ENERGY STAR ERI calculation for SFNH National v3.3 and MFNC National v1.3.
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- Updates to ENERGY STAR SFNH Rev 14 and MFNC Rev 05.
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-**Breaking change**: Building types "single-family detached" and "single-family attached" may only be used for SFNC versions and "apartment unit" may only be used for MFNC versions.
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## OpenStudio-ERI v1.9.2
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__New Features__
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__Features__
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- Updates HERS test outputs to match the latest RESNET accreditation forms.
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## OpenStudio-ERI v1.9.1
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## OpenStudio-ERI v1.9.0
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__New Features__
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__Features__
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- Updates to OpenStudio 3.9/EnergyPlus 24.2/HPXML v4.1-rc1.
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- Adds 2024 IECC ERI pathway calculation.
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-**Breaking change**: Renamed `Emissions: <EmissionsType>: RESNET: XXX` to `Emissions: <EmissionsType>: ANSI301: XXX` in Annual Home CSV output files.
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## OpenStudio-ERI v1.8.0
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__New Features__
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__Features__
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- Updates to OpenStudio 3.8, EnergyPlus 24.1, HPXML 4.0-rc4.
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- Implements ANSI/RESNET/ICC Standard 301-2022 and Addendum C.
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-**Breaking change**: For shared water heaters, `NumberofUnitsServed` is replaced by `extension/NumberofBedroomsServed`.
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## OpenStudio-ERI v1.7.0
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__New Features__
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__Features__
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- Updates to OpenStudio 3.7.0/EnergyPlus 23.2.
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-**Breaking change**: Updates to HPXML v4.0-rc2:
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- HPXML namespace changed from http://hpxmlonline.com/2019/10 to http://hpxmlonline.com/2023/09.
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## OpenStudio-ERI v1.6.0
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__New Features__
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__Features__
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- Updates to OpenStudio 3.6.1/EnergyPlus 23.1.
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-**Breaking change**: CO2e Index results must now be requested through a new optional `SoftwareInfo/extension/CO2IndexCalculation/Version` input.
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-**Breaking change**: Updates to newer proposed HPXML v4.0:
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## OpenStudio-ERI v1.5.2
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__New Features__
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__Features__
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- Adds support for ZERH Single Family v2.
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- Updates to ENERGY STAR SFNH Rev 12 and MFNC Rev 03.
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-`WaterHeatingSystem/RecoveryEfficiency` is now an optional input.
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## OpenStudio-ERI v1.5.0
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__New Features__
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__Features__
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- Updates to OpenStudio 3.5.0/EnergyPlus 22.2.
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-**Breaking change**: Updates to newer proposed HPXML v4.0:
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- Replaces `FrameFloors/FrameFloor` with `Floors/Floor`.
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## OpenStudio-ERI v1.4.0
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__New Features__
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__Features__
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- Updates to OpenStudio 3.4.0/EnergyPlus 22.1.
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- Updates to OpenStudio-HPXML 1.4.0.
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- Implements ANSI/RESNET/ICC Standard 301-2019 Addenda C & D. `ERICalculation/Version` can now be "2019ABC" or "2019ABCD" in the HPXML files.
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## OpenStudio-ERI v1.3.0
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__New Features__
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__Features__
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- Updates to OpenStudio 3.3.0/EnergyPlus 9.6.0.
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-**Breaking change**: HVAC grading inputs `FanPowerNotTested`, `AirflowNotTested`, and `ChargeNotTested` are no longer accepted.
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-**Breaking change**: Replaces "Unmet Load" outputs with "Unmet Hours".
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## OpenStudio-ERI v1.2.1
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__New Features__
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__Features__
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- Revises shared mechanical ventilation preconditioning control logic to operate less often.
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## OpenStudio-ERI v1.2.0
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__New Features__
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__Features__
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- Adds ENERGY STAR ERI Target workflow for new construction in accordance with [ENERGY STAR Certification System for Homes and Apartments Using an Energy Rating Index-Based Compliance Path](https://www.energystar.gov/sites/default/files/asset/document/ENERGY%20STAR%20Certification%20System.pdf).
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- Optional `SoftwareInfo/extension/EnergyStarCalculation/Version` (values like "SF_National_3.1"; required if running ENERGY STAR calculation).
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-**Breaking change**: `Building/Site/Address/StateCode` (values like "CO" or "FL") now required.
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## OpenStudio-ERI v1.1.2
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__New Features__
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__Features__
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- Revises shared mechanical ventilation preconditioning control logic to operate less often.
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## OpenStudio-ERI v1.1.1
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__New Features__
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__Features__
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- Allow `Slab/ExposedPerimeter` to be zero.
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-`ClothesDryer/ControlType` is no longer required if 301 version >= 2019A
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- Moves additional error-checking from the ruby measure to the schematron validator.
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## OpenStudio-ERI v1.1.0
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__New Features__
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__Features__
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- Implements ANSI/RESNET/ICC Standard 301-2019 Addendum B. `ERICalculation/Version` can now be "2019AB" in the HPXML files.
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-**Breaking change**: New HVAC installation quality inputs required for air conditioners, heat pumps, and furnaces.
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- Adds modeling of dehumidifiers.
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## OpenStudio-ERI v1.0.0
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__New Features__
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__Features__
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- Updates to OpenStudio 3.1.0/EnergyPlus 9.4.0.
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-**Breaking change**: Deprecates `WeatherStation/WMO` HPXML input, use `WeatherStation/extension/EPWFilePath` instead.
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- Implements water heater Uniform Energy Factor (UEF) model; replaces RESNET UEF->EF regression. **Breaking change**: `FirstHourRating` is now a required input for storage water heaters when UEF is provided.
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## OpenStudio-ERI v0.11.0 Beta
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__New Features__
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__Features__
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- New [Schematron](http://schematron.com) validation (301validator.xml) replaces custom ruby validation (301validator.rb)
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- Ability to model shared systems for Attached/Multifamily dwelling units
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- Shared HVAC systems (cooling towers, chillers, central boilers, water loop heat pumps, fan coils, ground source heat pumps on shared hydronic circulation loops)
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## OpenStudio-ERI v0.10.0 Beta
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__New Features__
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- Implements ANSI/RESNET/ICC Standard 301-2019 and Addendum A. Shared systems are not yet supported.
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-`ERICalculation/Version` can be "2019A" or "2019"
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-**[Breaking change]**`Attic/WithinInfiltrationVolume` is required for unvented attics
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## OpenStudio-ERI v0.9.0 Beta
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__New Features__
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__Features__
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-**[Breaking change]** Updates to OpenStudio v3.0.0 and EnergyPlus 9.3.
-**[Breaking change]**`BuildingConstruction/ResidentialFacilityType` is now required. Valid choices are: "single-family detached", "single-family attached", "apartment unit", "manufactured home".
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-`extension/StandbyLoss` changed to `StandbyLoss` for indirect water heaters.
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-`Site/extension/DisableNaturalVentilation` changed to `BuildingConstruction/extension/FractionofOperableWindowArea` for ASHRAE 140-based test files.
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__New Features__
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- Allows modeling of whole-house fans.
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- Adds optional `CompressorType` input for ACs/ASHPs.
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- Improved natural ventilation algorithm that reduces the potential for incurring additional heating energy.
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- The `--hourly-output` argument now only generates hourly output for the Reference/Rated Homes, not the IAD Homes, for faster runtime.
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- Foundation walls described with the `Insulation/Layer` approach now require two layers (i.e., interior and exterior). (Foundation walls described using the `Insulation/AssemblyEffectiveRValue` approach are unchanged.) See [here](https://github.com/NatLabRockies/OpenStudio-HPXML/pull/120) for more information.
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__New Features__
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- Runtime performance improvements for all buildings.
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- Adds dual fuel heat pump model with a switchover temperature input.
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- Adds solar hot water models. Inputs are either a system-level solar fraction or detailed collector inputs for flat-plate, evacuated tube, and ICS systems.
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- "Other Fuel" is now disaggregated into "Fuel Oil" and "Propane"
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- Peak load units are changed from W to kBtu
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__New Features__
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- Adds ability to specify evaporative coolers
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- Adds heating/cooling component loads reporting to results/ERI____Home.csv output files. See the Outputs documentation for more information.
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- When an `AirDistribution` is specified, only supply duct leakage is now required. Return duct leakage, supply ducts, and return ducts are now optional.
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- None
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- Adds thermostat information (setpoints, setbacks/setups, ceiling fan offset) to all the configured homes' HPXMLs.
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- Runtime improvements for homes with heat pump water heaters.
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- Runtime improvements for homes with slabs/crawlspaces/basements.
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- Hot water tests: Hot water recirculation pump energy is now disaggregated.
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- ASHRAE 140 tests: Load results are separated into heating/cooling categories.
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__New Features__
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- Adds an optional `--hourly-output` argument to request an hourly output CSV file that includes zone temperatures and energy uses disaggregated by fuel.
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- Adds ability to model a desuperheater attached to a ground source heat pump, air source heat pump, or air conditioner.
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- Adds `SensibleHeatFraction` as a new optional input for air conditioners.
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- Added heating, cooling, and hot water loads.
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- Added *unmet* heating and cooling loads.
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__New Features__
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- General runtime performance improvements.
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- Combination boilers, which provide both space and water heating, can be specified. Use `WaterHeatingSystem/WaterHeaterType` and point `WaterHeatingSystem/RelatedHVACSystem` to a `HeatingSystem` of type boiler.
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- Water heater tank wrap insulation can be optionally specified via `WaterHeatingSystem/WaterHeaterInsulation/Jacket/JacketRValue`.
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-`CoolingSystemType="central air conditioning"` is now `"central air conditioner"` (consistent with `"room air conditioner"`)
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__New Features__
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- Now passes Reference Home Auto-Generation tests (specifically e-Ratio test)
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- Allows HRVs/ERVs to be specified with `AdjustedSensibleRecoveryEfficiency` and `AdjustedTotalRecoveryEfficiency` (instead of `SensibleRecoveryEfficiency` and `TotalRecoveryEfficiency`)
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- Allows ducts to be located outside (`DuctLocation="outside"`)
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