Workflow Outputs

OpenStudio-HPXML generates a number of workflow outputs:

File	Notes
in.xml	See HPXML Defaults. HPXML file populated with defaulted values (e.g., autosized HVAC capacities).
in.idf	EnergyPlus input file.
in.osm	OpenStudio model file. Only generated if the debug argument is used.
results_annual.csv (or .json or .msgpack)	See Annual Outputs. Simulation annual outputs, autosized HVAC capacities and design loads, etc. in CSV or JSON format.
results_timeseries.csv (or .json or .msgpack)	See Timeseries Outputs. Simulation timeseries outputs in CSV or JSON format. Only generated if requested.
results_bills.csv (or .json or .msgpack)	See Utility Bill Outputs. Utility bill outputs in CSV or JSON format.
results_design_load_details.csv (or .json or .msgpack)	See Design Load Details Outputs. Additional details related to HVAC design load calculations.
run.log	Errors/warnings generated by the OpenStudio-HPXML workflow.
eplusout.*	EnergyPlus output files (e.g., msgpack output, error log). Defaults to a subset of possible files; use debug to produce ALL files.

Note

MBtu is defined as one million Btu.

HPXML Defaults

OpenStudio-HPXML will always generate an HPXML file called in.xml, located in the run directory. This file reflects the HPXML input file provided by the user but includes any default values that OpenStudio-HPXML has used. These default values will all be tagged with the dataSource='software' attribute.

For example, suppose a central air conditioner is described in the HPXML input file like so:

<HVACPlant>
  <CoolingSystem>
    <SystemIdentifier id='CoolingSystem1'/>
    <DistributionSystem idref='HVACDistribution1'/>
    <CoolingSystemType>central air conditioner</CoolingSystemType>
    <CoolingSystemFuel>electricity</CoolingSystemFuel>
    <FractionCoolLoadServed>1.0</FractionCoolLoadServed>
    <AnnualCoolingEfficiency>
      <Units>SEER</Units>
      <Value>13.0</Value>
    </AnnualCoolingEfficiency>
  </CoolingSystem>
</HVACPlant>

The in.xml output file will include autosized HVAC capacities as well as some other details:

<HVACPlant>
  <CoolingSystem>
    <SystemIdentifier id='CoolingSystem1'/>
    <DistributionSystem idref='HVACDistribution1'/>
    <CoolingSystemType>central air conditioner</CoolingSystemType>
    <CoolingSystemFuel>electricity</CoolingSystemFuel>
    <CoolingCapacity dataSource='software'>18773.0</CoolingCapacity>
    <CompressorType dataSource='software'>single stage</CompressorType>
    <FractionCoolLoadServed>1.0</FractionCoolLoadServed>
    <AnnualCoolingEfficiency>
      <Units>SEER</Units>
      <Value>13.0</Value>
    </AnnualCoolingEfficiency>
    <SensibleHeatFraction dataSource='software'>0.73</SensibleHeatFraction>
    <extension>
      <AirflowDefectRatio dataSource='software'>0.0</AirflowDefectRatio>
      <ChargeDefectRatio dataSource='software'>0.0</ChargeDefectRatio>
      <FanPowerWattsPerCFM dataSource='software'>0.375</FanPowerWattsPerCFM>
      <CoolingAirflowCFM dataSource='software'>781.0</CoolingAirflowCFM>
    </extension>
  </CoolingSystem>
</HVACPlant>

Annual Outputs

OpenStudio-HPXML will always generate an annual output file called results_annual.csv (or .json or .msgpack), located in the run directory. The file includes the following sections of output:

Annual Energy

Annual energy outputs are listed below.

Type	Notes
Energy Use: Total (MBtu)	Total energy consumption
Energy Use: Net (MBtu)	Total energy consumption minus power produced by PV

Annual Energy by Fuel Use

Fuel uses are listed below.

Type	Notes
Fuel Use: Electricity: Total (MBtu)	Total electricity consumption
Fuel Use: Electricity: Net (MBtu)	Total energy consumption minus power produced by PV
Fuel Use: Natural Gas: Total (MBtu)
Fuel Use: Fuel Oil: Total (MBtu)	Includes “fuel oil”, “fuel oil 1”, “fuel oil 2”, “fuel oil 4”, “fuel oil 5/6”, “kerosene”, and “diesel”
Fuel Use: Propane: Total (MBtu)
Fuel Use: Wood Cord: Total (MBtu)
Fuel Use: Wood Pellets: Total (MBtu)
Fuel Use: Coal: Total (MBtu)	Includes “coal”, “anthracite coal”, “bituminous coal”, and “coke”

Annual Energy By End Use

End uses are listed below.

Note that all end uses are mutually exclusive – the “Electricity: Heating” end use, for example, excludes energy reported in the “Electricity: Heating Fans/Pumps” end use. So the sum of all end uses for a given fuel (e.g., sum of all “End Use: Natural Gas: *”) equal the above reported fuel use (e.g., “Fuel Use: Natural Gas: Total”).

Type	Notes
End Use: Electricity: Heating (MBtu)	Excludes heat pump backup and fans/pumps
End Use: Electricity: Heating Fans/Pumps (MBtu)	Includes supply fan (air distribution) or circulating pump (hydronic distribution or geothermal loop)
End Use: Electricity: Heating Heat Pump Backup (MBtu)	Excludes heat pump backup fans/pumps
End Use: Electricity: Heating Heat Pump Backup Fans/Pumps (MBtu)	Includes supply fan (air distribution) or circulating pump (hydronic distribution) during heat pump backup
End Use: Electricity: Cooling (MBtu)	Excludes fans/pumps
End Use: Electricity: Cooling Fans/Pumps (MBtu)	Includes supply fan (air distribution) and circulating pump (geothermal loop)
End Use: Electricity: Hot Water (MBtu)	Excludes recirc pump and solar thermal pump
End Use: Electricity: Hot Water Recirc Pump (MBtu)
End Use: Electricity: Hot Water Solar Thermal Pump (MBtu)	Non-zero only when using detailed (not simple) solar thermal inputs
End Use: Electricity: Lighting Interior (MBtu)
End Use: Electricity: Lighting Garage (MBtu)
End Use: Electricity: Lighting Exterior (MBtu)	Includes exterior holiday lighting
End Use: Electricity: Mech Vent (MBtu)	Excludes preheating/precooling
End Use: Electricity: Mech Vent Preheating (MBtu)
End Use: Electricity: Mech Vent Precooling (MBtu)
End Use: Electricity: Whole House Fan (MBtu)
End Use: Electricity: Refrigerator (MBtu)
End Use: Electricity: Freezer (MBtu)
End Use: Electricity: Dehumidifier (MBtu)
End Use: Electricity: Dishwasher (MBtu)
End Use: Electricity: Clothes Washer (MBtu)
End Use: Electricity: Clothes Dryer (MBtu)
End Use: Electricity: Range/Oven (MBtu)
End Use: Electricity: Ceiling Fan (MBtu)
End Use: Electricity: Television (MBtu)
End Use: Electricity: Plug Loads (MBtu)	Excludes independently reported plug loads (e.g., well pump)
End Use: Electricity: Well Pump (MBtu)
End Use: Electricity: Pool Heater (MBtu)
End Use: Electricity: Pool Pump (MBtu)
End Use: Electricity: Permanent Spa Heater (MBtu)
End Use: Electricity: Permanent Spa Pump (MBtu)
End Use: Electricity: PV (MBtu)	Negative value for any power produced
End Use: Electricity: Generator (MBtu)	Negative value for any power produced
End Use: Electricity: Battery (MBtu)	Positive value for charging (including efficiency losses); negative value for discharging
End Use: Electricity: Electric Vehicle Charging (MBtu)
End Use: Natural Gas: Heating (MBtu)	Excludes heat pump backup
End Use: Natural Gas: Heating Heat Pump Backup (MBtu)
End Use: Natural Gas: Hot Water (MBtu)
End Use: Natural Gas: Clothes Dryer (MBtu)
End Use: Natural Gas: Range/Oven (MBtu)
End Use: Natural Gas: Mech Vent Preheating (MBtu)
End Use: Natural Gas: Pool Heater (MBtu)
End Use: Natural Gas: Permanent Spa Heater (MBtu)
End Use: Natural Gas: Grill (MBtu)
End Use: Natural Gas: Lighting (MBtu)
End Use: Natural Gas: Fireplace (MBtu)
End Use: Natural Gas: Generator (MBtu)	Positive value for any fuel consumed
End Use: Fuel Oil: Heating (MBtu)	Excludes heat pump backup
End Use: Fuel Oil: Heating Heat Pump Backup (MBtu)
End Use: Fuel Oil: Hot Water (MBtu)
End Use: Fuel Oil: Clothes Dryer (MBtu)
End Use: Fuel Oil: Range/Oven (MBtu)
End Use: Fuel Oil: Mech Vent Preheating (MBtu)
End Use: Fuel Oil: Grill (MBtu)
End Use: Fuel Oil: Lighting (MBtu)
End Use: Fuel Oil: Fireplace (MBtu)
End Use: Fuel Oil: Generator (MBtu)	Positive value for any fuel consumed
End Use: Propane: Heating (MBtu)	Excludes heat pump backup
End Use: Propane: Heating Heat Pump Backup (MBtu)
End Use: Propane: Hot Water (MBtu)
End Use: Propane: Clothes Dryer (MBtu)
End Use: Propane: Range/Oven (MBtu)
End Use: Propane: Mech Vent Preheating (MBtu)
End Use: Propane: Grill (MBtu)
End Use: Propane: Lighting (MBtu)
End Use: Propane: Fireplace (MBtu)
End Use: Propane: Generator (MBtu)	Positive value for any fuel consumed
End Use: Wood Cord: Heating (MBtu)	Excludes heat pump backup
End Use: Wood Cord: Heating Heat Pump Backup (MBtu)
End Use: Wood Cord: Hot Water (MBtu)
End Use: Wood Cord: Clothes Dryer (MBtu)
End Use: Wood Cord: Range/Oven (MBtu)
End Use: Wood Cord: Mech Vent Preheating (MBtu)
End Use: Wood Cord: Grill (MBtu)
End Use: Wood Cord: Lighting (MBtu)
End Use: Wood Cord: Fireplace (MBtu)
End Use: Wood Cord: Generator (MBtu)	Positive value for any fuel consumed
End Use: Wood Pellets: Heating (MBtu)	Excludes heat pump backup
End Use: Wood Pellets: Heating Heat Pump Backup (MBtu)
End Use: Wood Pellets: Hot Water (MBtu)
End Use: Wood Pellets: Clothes Dryer (MBtu)
End Use: Wood Pellets: Range/Oven (MBtu)
End Use: Wood Pellets: Mech Vent Preheating (MBtu)
End Use: Wood Pellets: Grill (MBtu)
End Use: Wood Pellets: Lighting (MBtu)
End Use: Wood Pellets: Fireplace (MBtu)
End Use: Wood Pellets: Generator (MBtu)	Positive value for any fuel consumed
End Use: Coal: Heating (MBtu)	Excludes heat pump backup
End Use: Coal: Heating Heat Pump Backup (MBtu)
End Use: Coal: Hot Water (MBtu)
End Use: Coal: Clothes Dryer (MBtu)
End Use: Coal: Range/Oven (MBtu)
End Use: Coal: Mech Vent Preheating (MBtu)
End Use: Coal: Grill (MBtu)
End Use: Coal: Lighting (MBtu)
End Use: Coal: Fireplace (MBtu)
End Use: Coal: Generator (MBtu)	Positive value for any fuel consumed

Annual Energy By System Use

Results for each end use of each heating, cooling, and water heating system defined in the HPXML file are listed as shown below. Non-zero end uses from Annual Energy By End Use will be included.

Type	Notes
System Use: <HeatingSystemID>: <FuelType>: <EndUse> (MBtu)	End use energy for the heating system
System Use: <CoolingSystemID>: <FuelType>: <EndUse> (MBtu)	End use energy for the cooling system
System Use: <HeatPumpID>: <FuelType>: <EndUse> (MBtu)	End use energy for the heat pump system
System Use: <WaterHeatingSystemID>: <FuelType>: <EndUse> (MBtu)	End use energy for the water heating system
System Use: <VentilationFanID>: <FuelType>: <EndUse> (MBtu)	End use energy for the ventilation fan system (preheating/precooling only)

Annual Emissions

Results for each emissions scenario defined in the HPXML file are listed as shown below.

Type	Notes
Emissions: <EmissionsType>: <ScenarioName>: Total (lb)	Scenario total emissions
Emissions: <EmissionsType>: <ScenarioName>: Net (lb)	Scenario total emissions minus power produced by PV

Annual Emissions by Fuel Use

Results for each emissions scenario defined in the HPXML file are listed as shown below.

Type	Notes
Emissions: <EmissionsType>: <ScenarioName>: Electricity: Total (lb)	Scenario total emissions for Electricity only
Emissions: <EmissionsType>: <ScenarioName>: Electricity: Net (lb)	Scenario total emissions for Electricity only minus power produced by PV
Emissions: <EmissionsType>: <ScenarioName>: Natural Gas: Total (lb)	Scenario emissions for Natural Gas only
Emissions: <EmissionsType>: <ScenarioName>: Fuel Oil: Total (lb)	Scenario emissions for Fuel Oil only
Emissions: <EmissionsType>: <ScenarioName>: Propane: Total (lb)	Scenario emissions for Propane only
Emissions: <EmissionsType>: <ScenarioName>: Wood Cord: Total (lb)	Scenario emissions for Wood Cord only
Emissions: <EmissionsType>: <ScenarioName>: Wood Pellets: Total (lb)	Scenario emissions for Wood Pellets only
Emissions: <EmissionsType>: <ScenarioName>: Coal: Total (lb)	Scenario emissions for Coal only

Annual Emissions by End Use

Results for each emissions scenario defined in the HPXML file are listed as shown below. Every end use from Annual Energy By End Use will be included.

Type	Notes
Emissions: <EmissionsType>: <ScenarioName>: Electricity: <EndUse> (lb)	Scenario emissions for this Electricity end use (one row per end use)
Emissions: <EmissionsType>: <ScenarioName>: Natural Gas: <EndUse> (lb)	Scenario emissions for this Natural Gas end use (one row per end use)
Emissions: <EmissionsType>: <ScenarioName>: Fuel Oil: <EndUse> (lb)	Scenario emissions for this Fuel Oil end use (one row per end use)
Emissions: <EmissionsType>: <ScenarioName>: Propane: <EndUse> (lb)	Scenario emissions for this Propane end use (one row per end use)
Emissions: <EmissionsType>: <ScenarioName>: Wood Cord: <EndUse> (lb)	Scenario emissions for this Wood Cord end use (one row per end use)
Emissions: <EmissionsType>: <ScenarioName>: Wood Pellets: <EndUse> (lb)	Scenario emissions for this Wood Pellets end use (one row per end use)
Emissions: <EmissionsType>: <ScenarioName>: Coal: <EndUse> (lb)	Scenario emissions for this Coal end use (one row per end use)

Annual Building Loads

Annual building loads are listed below.

Type	Notes
Load: Heating: Delivered (MBtu)	Total heating load delivered, including distribution losses.
Load: Heating: Heat Pump Backup (MBtu)	Heating load delivered by the heat pump backup only, including distribution losses.
Load: Cooling: Delivered (MBtu)	Total cooling load delivered, including distribution losses.
Load: Hot Water: Delivered (MBtu)	Total hot water load delivered, including contributions by desuperheaters or solar thermal systems.
Load: Hot Water: Tank Losses (MBtu)
Load: Hot Water: Desuperheater (MBtu)	Hot water load delivered by the desuperheater.
Load: Hot Water: Solar Thermal (MBtu)	Hot water load delivered by the solar thermal system.

Note that the “Delivered” loads represent the energy delivered by the HVAC/DHW system; if a system is significantly undersized, there will be unmet load not reflected by these values. If the home is not fully conditioned (e.g., a room air conditioner that only meets 30% of the cooling load), the reported load will be likewise reduced compared to a home that is fully conditioned.

Annual Unmet Hours

Annual unmet hours are listed below.

Type	Notes
Unmet Hours: Heating (hr)	Number of hours where the heating setpoint is not maintained. [1]
Unmet Hours: Cooling (hr)	Number of hours where the cooling setpoint is not maintained.
Unmet Hours: EV Driving (hr)	Number of hours where the EV driving demand is not met. [2]

[1]

The unmet heating and cooling numbers reflect the number of hours during the heating/cooling season when the conditioned space temperature deviates more than 0.2 deg-C (0.36 deg-F) from the heating/cooling setpoint.

[2]

The unmet EV driving number represents the total time in which the electric vehicle discharge schedule exceeds zero while the EV battery’s state of charge is at its minimum level. Unmet EV driving hours indicate unrealized driving events and reduced EV charging energy. Unmet hours will only occur when using the detailed electric vehicle model in HPXML Vehicles, not the simple EV charging in HPXML Plug Loads.

Peak Building Electricity

Peak building electricity outputs are listed below. Values are calculated as the maximum energy use for any individual timestep divided by the timestep length.

Type	Notes
Peak Electricity: Winter Total (W)	Winter maximum for total electricity consumption [3]
Peak Electricity: Summer Total (W)	Summer maximum for total electricity consumption [4]
Peak Electricity: Annual Total (W)	Annual maximum for total electricity consumption
Peak Electricity: Winter Net (W)	Winter maximum for total electricity consumption minus power produced by PV
Peak Electricity: Summer Net (W)	Summer maximum for total electricity consumption minus power produced by PV
Peak Electricity: Annual Net (W)	Annual maximum for total electricity consumption minus power produced by PV

[3]

Winter is Dec/Jan/Feb (or Jun/Jul/Aug in the southern hemisphere).

[4]

Summer is Jun/Jul/Aug (or Dec/Jan/Feb in the southern hemisphere).

Peak Building Loads

Peak building loads are listed below. Values are calculated as the maximum load for any individual timestep divided by the timestep length.

Type	Notes
Peak Load: Heating: Delivered (kBtu/hr)	Includes HVAC distribution losses.
Peak Load: Cooling: Delivered (kBtu/hr)	Includes HVAC distribution losses.

Note that the “Delivered” peak loads represent the energy delivered by the HVAC system; if a system is significantly undersized, there will be unmet peak load not reflected by these values. If the home is not fully conditioned (e.g., a room air conditioner that only meets 30% of the cooling load), the reported peak load will be likewise reduced compared to a home that is fully conditioned.

Annual Component Building Loads

Note: This section is only available if the --add-component-loads argument is used. The argument is not used by default for faster performance.

Component loads represent the estimated contribution of different building components to the annual heating/cooling building loads. The sum of component loads for heating (or cooling) will roughly equal the annual heating (or cooling) building load reported above.

Component loads disaggregated by Heating/Cooling are listed below.

Type	Notes
Component Load: *: Roofs (MBtu)	Heat gain/loss through HPXML Roof elements adjacent to conditioned space
Component Load: *: Ceilings (MBtu)	Heat gain/loss through HPXML Floor elements (inferred to be ceilings) adjacent to conditioned space
Component Load: *: Walls (MBtu)	Heat gain/loss through HPXML Wall elements adjacent to conditioned space
Component Load: *: Rim Joists (MBtu)	Heat gain/loss through HPXML RimJoist elements adjacent to conditioned space
Component Load: *: Foundation Walls (MBtu)	Heat gain/loss through HPXML FoundationWall elements adjacent to conditioned space
Component Load: *: Doors (MBtu)	Heat gain/loss through HPXML Door elements adjacent to conditioned space
Component Load: *: Windows Conduction (MBtu)	Heat gain/loss attributed to conduction through HPXML Window elements adjacent to conditioned space
Component Load: *: Windows Solar (MBtu)	Heat gain/loss attributed to solar gains through HPXML Window elements adjacent to conditioned space
Component Load: *: Skylights Conduction (MBtu)	Heat gain/loss attributed to conduction through HPXML Skylight elements adjacent to conditioned space
Component Load: *: Skylights Solar (MBtu)	Heat gain/loss attributed to solar gains through HPXML Skylight elements adjacent to conditioned space
Component Load: *: Floors (MBtu)	Heat gain/loss through HPXML Floor elements (inferred to be floors) adjacent to conditioned space
Component Load: *: Slabs (MBtu)	Heat gain/loss through HPXML Slab elements adjacent to conditioned space
Component Load: *: Internal Mass (MBtu)	Heat gain/loss from internal mass (e.g., furniture, interior walls/floors) in conditioned space
Component Load: *: Infiltration (MBtu)	Heat gain/loss from airflow induced by stack and wind effects
Component Load: *: Natural Ventilation (MBtu)	Heat gain/loss from airflow through operable windows
Component Load: *: Mechanical Ventilation (MBtu)	Heat gain/loss from airflow/fan energy from mechanical ventilation systems (including clothes dryer exhaust)
Component Load: *: Whole House Fan (MBtu)	Heat gain/loss from airflow due to a whole house fan
Component Load: *: Ducts (MBtu)	Heat gain/loss from conduction and leakage losses through supply/return ducts outside conditioned space
Component Load: *: Internal Gains (MBtu)	Heat gain/loss from appliances, plug loads, water heater tank losses, etc. in the conditioned space
Component Load: *: Lighting (MBtu)	Heat gain/loss from lighting in the conditioned space

If the home is not fully conditioned (e.g., a room air conditioner that only meets 30% of the cooling load), the reported component loads will be likewise reduced compared to a home that is fully conditioned.

Annual Hot Water Uses

Annual hot water uses are listed below.

Type	Notes
Hot Water: Clothes Washer (gal)
Hot Water: Dishwasher (gal)
Hot Water: Fixtures (gal)	Showers and faucets.
Hot Water: Distribution Waste (gal)

Note

All values are gallons of hot water (e.g., at water heater setpoint), not total water (e.g., at the fixture temperature).

Resilience

Resilience outputs are listed below.

Type	Notes
Resilience: Battery (hr)	Average length of time the battery state of charge can meet the electric load [5]

[5]

Calculation is performed every timestep and then averaged, which assumes a power outage is equally likely to occur every hour of the year. The entire electric load is treated as a “critical load” that would be supported during an outage. Resilience hours are set to 0 for any timestep where the battery is not charged, even if there is sufficient PV to power the building.

HVAC Capacities

System outputs are listed below. Capacities for individual HVAC systems can be found in the in.xml file.

Type	Notes
HVAC Capacity: Cooling (Btu/h)	Total HVAC cooling capacity
HVAC Capacity: Heating (Btu/h)	Total HVAC heating capacity
HVAC Capacity: Heat Pump Backup (Btu/h)	Total HVAC heat pump backup capacity

Note

Autosized HVAC systems are based on HVAC Design Temperatures and HVAC Design Loads.

For heat pumps with a minimum compressor lockout temperature greater than the heating design temperature (e.g., a dual-fuel heat pump in a cold climate), the compressor will be sized based on heating design loads calculated at the compressor lockout temperature. This is done to prevent unutilized capacity at temperatures below the compressor lockout temperature. Any heat pump backup will still be based on heating design loads calculated using the heating design temperature.

HVAC Design Temperatures

Design temperatures are used in the design load calculations for autosizing of HVAC equipment; see HPXML HVAC Sizing Control for how they are derived. Design temperatures can also be found in the in.xml file.

Type	Notes
HVAC Design Temperature: Heating (F)	99% heating drybulb temperature
HVAC Design Temperature: Cooling (F)	1% cooling drybulb temperature

HVAC Design Loads

Design load outputs, used for autosizing of HVAC equipment, are listed below. Design loads are based on block load ACCA Manual J calculations using HVAC Design Temperatures. Design loads can also be found in the in.xml file. Additional detail related to design loads can be found in the Design Load Details Outputs.

Type	Notes
HVAC Design Load: Heating: Total (Btu/h)	Total heating design load
HVAC Design Load: Heating: Ducts (Btu/h)	Heating design load for ducts
HVAC Design Load: Heating: Windows (Btu/h)	Heating design load for windows
HVAC Design Load: Heating: Skylights (Btu/h)	Heating design load for skylights
HVAC Design Load: Heating: Doors (Btu/h)	Heating design load for doors
HVAC Design Load: Heating: Walls (Btu/h)	Heating design load for walls
HVAC Design Load: Heating: Roofs (Btu/h)	Heating design load for roofs
HVAC Design Load: Heating: Floors (Btu/h)	Heating design load for floors
HVAC Design Load: Heating: Slabs (Btu/h)	Heating design load for slabs
HVAC Design Load: Heating: Ceilings (Btu/h)	Heating design load for ceilings
HVAC Design Load: Heating: Infiltration (Btu/h)	Heating design load for infiltration
HVAC Design Load: Heating: Ventilation (Btu/h)	Heating design load for ventilation
HVAC Design Load: Heating: Piping (Btu/h)	Heating design load for hydronic piping
HVAC Design Load: Cooling Sensible: Total (Btu/h)	Total sensible cooling design load
HVAC Design Load: Cooling Sensible: Ducts (Btu/h)	Sensible cooling design load for ducts
HVAC Design Load: Cooling Sensible: Windows (Btu/h)	Sensible cooling design load for windows
HVAC Design Load: Cooling Sensible: Skylights (Btu/h)	Sensible cooling design load for skylights
HVAC Design Load: Cooling Sensible: Doors (Btu/h)	Sensible cooling design load for doors
HVAC Design Load: Cooling Sensible: Walls (Btu/h)	Sensible cooling design load for walls
HVAC Design Load: Cooling Sensible: Roofs (Btu/h)	Sensible cooling design load for roofs
HVAC Design Load: Cooling Sensible: Floors (Btu/h)	Sensible cooling design load for floors
HVAC Design Load: Cooling Sensible: Slabs (Btu/h)	Sensible cooling design load for slabs
HVAC Design Load: Cooling Sensible: Ceilings (Btu/h)	Sensible cooling design load for ceilings
HVAC Design Load: Cooling Sensible: Infiltration (Btu/h)	Sensible cooling design load for infiltration
HVAC Design Load: Cooling Sensible: Ventilation (Btu/h)	Sensible cooling design load for ventilation
HVAC Design Load: Cooling Sensible: Internal Gains (Btu/h)	Sensible cooling design load for internal gains
HVAC Design Load: Cooling Sensible: Blower Heat (Btu/h)	Sensible cooling design load for blower fan heat
HVAC Design Load: Cooling Sensible: AED Excursion (Btu/h)	Sensible cooling design load for Adequate Exposure Diversity (AED) excursion
HVAC Design Load: Cooling Latent: Total (Btu/h)	Total latent cooling design load
HVAC Design Load: Cooling Latent: Ducts (Btu/h)	Latent cooling design load for ducts
HVAC Design Load: Cooling Latent: Infiltration (Btu/h)	Latent cooling design load for infiltration
HVAC Design Load: Cooling Latent: Ventilation (Btu/h)	Latent cooling design load for ventilation
HVAC Design Load: Cooling Latent: Internal Gains (Btu/h)	Latent cooling design load for internal gains

HVAC Zone Design Loads

For each conditioned zone (see HPXML Zones/Spaces), zone-level design loads are available as listed below. Zone design loads can also be found in the in.xml file. Additional detail related to zone design loads can be found in the Design Load Details Outputs:.

Type	Notes
HVAC Zone Design Load: <ZoneID>: Heating: Total (Btu/h)	Total heating design load
HVAC Zone Design Load: <ZoneID>: Heating: Ducts (Btu/h)	Heating design load for ducts
HVAC Zone Design Load: <ZoneID>: Heating: Windows (Btu/h)	Heating design load for windows
HVAC Zone Design Load: <ZoneID>: Heating: Skylights (Btu/h)	Heating design load for skylights
HVAC Zone Design Load: <ZoneID>: Heating: Doors (Btu/h)	Heating design load for doors
HVAC Zone Design Load: <ZoneID>: Heating: Walls (Btu/h)	Heating design load for walls
HVAC Zone Design Load: <ZoneID>: Heating: Roofs (Btu/h)	Heating design load for roofs
HVAC Zone Design Load: <ZoneID>: Heating: Floors (Btu/h)	Heating design load for floors
HVAC Zone Design Load: <ZoneID>: Heating: Slabs (Btu/h)	Heating design load for slabs
HVAC Zone Design Load: <ZoneID>: Heating: Ceilings (Btu/h)	Heating design load for ceilings
HVAC Zone Design Load: <ZoneID>: Heating: Infiltration (Btu/h)	Heating design load for infiltration
HVAC Zone Design Load: <ZoneID>: Heating: Ventilation (Btu/h)	Heating design load for ventilation
HVAC Zone Design Load: <ZoneID>: Heating: Piping (Btu/h)	Heating design load for hydronic piping
HVAC Zone Design Load: <ZoneID>: Cooling Sensible: Total (Btu/h)	Total sensible cooling design load
HVAC Zone Design Load: <ZoneID>: Cooling Sensible: Ducts (Btu/h)	Sensible cooling design load for ducts
HVAC Zone Design Load: <ZoneID>: Cooling Sensible: Windows (Btu/h)	Sensible cooling design load for windows
HVAC Zone Design Load: <ZoneID>: Cooling Sensible: Skylights (Btu/h)	Sensible cooling design load for skylights
HVAC Zone Design Load: <ZoneID>: Cooling Sensible: Doors (Btu/h)	Sensible cooling design load for doors
HVAC Zone Design Load: <ZoneID>: Cooling Sensible: Walls (Btu/h)	Sensible cooling design load for walls
HVAC Zone Design Load: <ZoneID>: Cooling Sensible: Roofs (Btu/h)	Sensible cooling design load for roofs
HVAC Zone Design Load: <ZoneID>: Cooling Sensible: Floors (Btu/h)	Sensible cooling design load for floors
HVAC Zone Design Load: <ZoneID>: Cooling Sensible: Slabs (Btu/h)	Sensible cooling design load for slabs
HVAC Zone Design Load: <ZoneID>: Cooling Sensible: Ceilings (Btu/h)	Sensible cooling design load for ceilings
HVAC Zone Design Load: <ZoneID>: Cooling Sensible: Infiltration (Btu/h)	Sensible cooling design load for infiltration
HVAC Zone Design Load: <ZoneID>: Cooling Sensible: Ventilation (Btu/h)	Sensible cooling design load for ventilation
HVAC Zone Design Load: <ZoneID>: Cooling Sensible: Internal Gains (Btu/h)	Sensible cooling design load for internal gains
HVAC Zone Design Load: <ZoneID>: Cooling Sensible: Blower Heat (Btu/h)	Sensible cooling design load for blower fan heat
HVAC Zone Design Load: <ZoneID>: Cooling Sensible: AED Excursion (Btu/h)	Sensible cooling design load for Adequate Exposure Diversity (AED) excursion
HVAC Zone Design Load: <ZoneID>: Cooling Latent: Total (Btu/h)	Total latent cooling design load
HVAC Zone Design Load: <ZoneID>: Cooling Latent: Ducts (Btu/h)	Latent cooling design load for ducts
HVAC Zone Design Load: <ZoneID>: Cooling Latent: Infiltration (Btu/h)	Latent cooling design load for infiltration
HVAC Zone Design Load: <ZoneID>: Cooling Latent: Ventilation (Btu/h)	Latent cooling design load for ventilation
HVAC Zone Design Load: <ZoneID>: Cooling Latent: Internal Gains (Btu/h)	Latent cooling design load for internal gains

HVAC Space Design Loads

For each space in a conditioned zone (see HPXML Zones/Spaces), space-level design loads are available as listed below. Space design loads can also be found in the in.xml file. Additional detail related to space design loads can be found in the Design Load Details Outputs:.

Type	Notes
HVAC Space Design Load: <SpaceID>: Heating: Total (Btu/h)	Total heating design load
HVAC Space Design Load: <SpaceID>: Heating: Ducts (Btu/h)	Heating design load for ducts
HVAC Space Design Load: <SpaceID>: Heating: Windows (Btu/h)	Heating design load for windows
HVAC Space Design Load: <SpaceID>: Heating: Skylights (Btu/h)	Heating design load for skylights
HVAC Space Design Load: <SpaceID>: Heating: Doors (Btu/h)	Heating design load for doors
HVAC Space Design Load: <SpaceID>: Heating: Walls (Btu/h)	Heating design load for walls
HVAC Space Design Load: <SpaceID>: Heating: Roofs (Btu/h)	Heating design load for roofs
HVAC Space Design Load: <SpaceID>: Heating: Floors (Btu/h)	Heating design load for floors
HVAC Space Design Load: <SpaceID>: Heating: Slabs (Btu/h)	Heating design load for slabs
HVAC Space Design Load: <SpaceID>: Heating: Ceilings (Btu/h)	Heating design load for ceilings
HVAC Space Design Load: <SpaceID>: Heating: Infiltration (Btu/h)	Heating design load for infiltration
HVAC Space Design Load: <SpaceID>: Cooling Sensible: Total (Btu/h)	Total sensible cooling design load
HVAC Space Design Load: <SpaceID>: Cooling Sensible: Ducts (Btu/h)	Sensible cooling design load for ducts
HVAC Space Design Load: <SpaceID>: Cooling Sensible: Windows (Btu/h)	Sensible cooling design load for windows
HVAC Space Design Load: <SpaceID>: Cooling Sensible: Skylights (Btu/h)	Sensible cooling design load for skylights
HVAC Space Design Load: <SpaceID>: Cooling Sensible: Doors (Btu/h)	Sensible cooling design load for doors
HVAC Space Design Load: <SpaceID>: Cooling Sensible: Walls (Btu/h)	Sensible cooling design load for walls
HVAC Space Design Load: <SpaceID>: Cooling Sensible: Roofs (Btu/h)	Sensible cooling design load for roofs
HVAC Space Design Load: <SpaceID>: Cooling Sensible: Floors (Btu/h)	Sensible cooling design load for floors
HVAC Space Design Load: <SpaceID>: Cooling Sensible: Slabs (Btu/h)	Sensible cooling design load for slabs
HVAC Space Design Load: <SpaceID>: Cooling Sensible: Ceilings (Btu/h)	Sensible cooling design load for ceilings
HVAC Space Design Load: <SpaceID>: Cooling Sensible: Infiltration (Btu/h)	Sensible cooling design load for infiltration
HVAC Space Design Load: <SpaceID>: Cooling Sensible: Internal Gains (Btu/h)	Sensible cooling design load for internal gains
HVAC Space Design Load: <SpaceID>: Cooling Sensible: AED Excursion (Btu/h)	Sensible cooling design load for Adequate Exposure Diversity (AED) excursion

HVAC Geothermal Loop

Geothermal loop outputs are listed below. Outputs for individual geothermal loops can be found in the in.xml file.

Type	Notes
HVAC Geothermal Loop: Borehole/Trench Count	Total number of vertical boreholes
HVAC Geothermal Loop: Borehole/Trench Length (ft)	Length (i.e., average depth) of each borehole

Timeseries Outputs

OpenStudio-HPXML can optionally generate a timeseries output file. The timeseries output file is called results_timeseries.csv (or .json or .msgpack) and located in the run directory. If multiple timeseries frequencies are requested (e.g., hourly and daily), the timeseries output filenames will include the frequency (e.g., run/results_timeseries_daily.csv).

Depending on the outputs requested, the file may include:

Type	Argument [6]	Notes
Total Consumptions	total	Energy use for building total and net (i.e., subtracts any power produced by PV).
Fuel Consumptions	fuels	Energy use for each fuel type (in kBtu for fossil fuels and kWh for electricity).
End Use Consumptions	enduses	Energy use for each end use type (in kBtu for fossil fuels and kWh for electricity).
System Use Consumptions	systemuses	Energy use for each HVAC and water heating system (in kBtu).
Emissions	emissions	Emissions (e.g., CO2) for each scenario defined in the HPXML file.
Emission Fuels	emissionfuels	Emissions (e.g., CO2) disaggregated by fuel type for each scenario defined in the HPXML file.
Emission End Uses	emissionenduses	Emissions (e.g., CO2) disaggregated by end use for each scenario defined in the HPXML file.
Hot Water Uses	hotwater	Water use for each end use type (in gallons).
Total Loads	loads	Heating, cooling, and hot water loads (in kBtu).
Component Loads	componentloads	Heating and cooling loads (in kBtu) disaggregated by component (e.g., Walls, Windows, Infiltration, Ducts, etc.).
Unmet Hours	unmethours	Heating, cooling, and EV driving unmet hours.
Zone Temperatures	temperatures	Zone temperatures (in deg-F) for each space (e.g., conditioned space, attic, garage, basement, crawlspace, etc.) plus heating/cooling setpoints.
Zone Conditions	conditions	Zone conditions (humidity ratio and relative humidity and dewpoint, radiant, and operative temperatures)
Airflows	airflows	Airflow rates (in cfm) for infiltration, mechanical ventilation (including clothes dryer exhaust), natural ventilation, whole house fans.
Weather	weather	Weather file data including outdoor temperatures, relative humidity, wind speed, and solar.
Resilience	resilience	Resilience outputs (currently only average resilience hours for battery storage).
EnergyPlus Output Variables/Meters		Any user-specified EnergyPlus output variables/meters (e.g., ‘Zone People Occupant Count’, ‘MainsWater:Facility’).

[6]

This is the argument provided to run_simulation.rb as described in the Basic Run usage instructions.

Timeseries outputs can be one of the following frequencies: hourly, daily, monthly, or timestep (i.e., equal to the simulation timestep, which defaults to an hour but can be sub-hourly).

Timestamps in the output use the start-of-period convention unless you have requested the end-of-period timestamp convention. Additional timestamp columns can be optionally requested that reflect daylight saving time (DST) and/or coordinated universal time (UTC). Most outputs will be summed over the hour (e.g., energy) but some will be averaged over the hour (e.g., temperatures, airflows).

Note that if the home is not fully conditioned (e.g., a room air conditioner that only meets 30% of the cooling load), the reported zone temperature for the conditioned space will reflect a fully conditioned home due to the way these systems are modeled in EnergyPlus.

Utility Bill Outputs

OpenStudio-HPXML can optionally generate utility bill output files (annual, monthly, or both). The annual utility bills output file is called results_bills.csv (or .json or .msgpack) and located in the run directory. The monthly utility bills output file is called results_bills_monthly.csv (or .json or .msgpack) and located in the run directory.

Annual Bills by Fuel Use

Annual results for each utility bill scenario defined in the HPXML file are listed as shown below.

Type	Notes
<ScenarioName>: Total (USD)	Scenario annual total charges.
<ScenarioName>: Electricity: Fixed (USD)	Scenario annual fixed charges for electricity.
<ScenarioName>: Electricity: Energy (USD)	Scenario annual energy charges for electricity.
<ScenarioName>: Electricity: PV Credit (USD)	Scenario annual production credit (negative value) for PV.
<ScenarioName>: Electricity: Total (USD)	Scenario annual total charges for electricity.
<ScenarioName>: Natural Gas: Fixed (USD)	Scenario annual fixed charges for natural gas.
<ScenarioName>: Natural Gas: Energy (USD)	Scenario annual energy charges for natural gas.
<ScenarioName>: Natural Gas: Total (USD)	Scenario annual total charges for natural gas.
<ScenarioName>: Fuel Oil: Fixed (USD)	Scenario annual fixed charges for fuel oil.
<ScenarioName>: Fuel Oil: Energy (USD)	Scenario annual energy charges for fuel oil.
<ScenarioName>: Fuel Oil: Total (USD)	Scenario annual total charges for fuel oil.
<ScenarioName>: Propane: Fixed (USD)	Scenario annual fixed charges for propane.
<ScenarioName>: Propane: Energy (USD)	Scenario annual energy charges for propane.
<ScenarioName>: Propane: Total (USD)	Scenario annual total charges for propane.
<ScenarioName>: Wood Cord: Fixed (USD)	Scenario annual fixed charges for wood cord.
<ScenarioName>: Wood Cord: Energy (USD)	Scenario annual energy charges for wood cord.
<ScenarioName>: Wood Cord: Total (USD)	Scenario annual total charges for wood cord.
<ScenarioName>: Wood Pellets: Fixed (USD)	Scenario annual fixed charges for wood pellets.
<ScenarioName>: Wood Pellets: Energy (USD)	Scenario annual energy charges for wood pellets.
<ScenarioName>: Wood Pellets: Total (USD)	Scenario annual total charges for wood pellets.
<ScenarioName>: Coal: Fixed (USD)	Scenario annual fixed charges for coal.
<ScenarioName>: Coal: Energy (USD)	Scenario annual energy charges for coal.
<ScenarioName>: Coal: Total (USD)	Scenario annual total charges for coal.

Monthly Bills by Fuel Use

Monthly results for each utility bill scenario defined in the HPXML file are listed as rows corresponding to Month, and columns corresponding to Type.

Design Load Details Outputs

OpenStudio-HPXML provides an additional output file called results_design_load_details.csv (or .json or .msgpack) that includes details related to the calculation of HVAC design loads for sizing equipment. The file includes values pertaining to ACCA Form J1 (see example on page 2 of here).

The file is organized into a few different reports described below.

Report: <BuildingID>: Summary

For each HPXML Building, the following output types are reported.

Type	Orientation	Heating HTM [7]	Cooling HTM [8]	Heating CFM [9]	Cooling CFM [10]
Windows: <WindowID>	X	X	X
Skylights: <SkylightID>	X	X	X
Doors: <DoorID>	X	X	X
Above Grade Walls: <WallID>	X	X	X
Below Grade Walls: <WallID>	X	X	X
Ceilings: <CeilingID>		X	X
Floors: <FloorID>		X	X
Infiltration				X	X
Ventilation				X	X

[7]

Heating HTM is the heating heat transfer multiplier (Btu/ft^2), which is multiplier by surface area to calculate the heating design load.

[8]

Cooling HTM is the cooling heat transfer multiplier (Btu/ft^2), which is multiplier by surface area to calculate the sensible cooling design load.

[9]

Heating CFM is the airflow rate (ft^3/min) during the heating season.

[10]

Cooling CFM is the airflow rate (ft^3/min) during the cooling season.

Report: <BuildingID>: Loads

For each HPXML Building, the following output types are reported.

Type	Area (ft^2)	Length (ft)	Wall Area Ratio	Heating (Btuh)	Cooling Sensible (Btuh)	Cooling Latent (Btuh)
Windows: <WindowID>	X			X	X
Skylights: <SkylightID>	X			X	X
Doors: <DoorID>	X			X	X
Above Grade Walls: <WallID>	X			X	X
Below Grade Walls: <WallID>	X			X	X
Ceilings: <CeilingID>	X			X	X
Floors: <FloorID>	X	See [11]		X	X
Infiltration			X	X	X	X
Internal Gains					X	X
Ducts				X	X	X
Ventilation				X	X	X
Piping				X
Blower Heat					X
AED Excursion					X
Total				X	X	X

[11]

Length will be provided for a slab floor under conditioned space.

Report: <BuildingID>: <ZoneID>: Loads

For each HPXML conditioned Zone (see HPXML Zones/Spaces), the following output types are reported. Only those surfaces attached to a space in the given zone will be included.

Type	Area (ft^2)	Length (ft)	Wall Area Ratio	Heating (Btuh)	Cooling Sensible (Btuh)	Cooling Latent (Btuh)
Windows: <WindowID>	X			X	X
Skylights: <SkylightID>	X			X	X
Doors: <DoorID>	X			X	X
Above Grade Walls: <WallID>	X			X	X
Below Grade Walls: <WallID>	X			X	X
Ceilings: <CeilingID>	X			X	X
Floors: <FloorID>	X	See [12]		X	X
Infiltration			X	X	X	X
Internal Gains					X	X
Ducts				X	X	X
Ventilation				X	X	X
Piping				X
Blower Heat					X
AED Excursion					X
Total				X	X	X

[12]

Length will be provided for a slab floor under conditioned space.

Report: <BuildingID>: <SpaceID>: Loads

For each HPXML Space in a conditioned zone (see HPXML Zones/Spaces), the following output types are reported. Only those surfaces attached to the given space will be included.

Type	Area (ft^2)	Length (ft)	Wall Area Ratio	Heating (Btuh)	Cooling Sensible (Btuh)
Windows: <WindowID>	X			X	X
Skylights: <SkylightID>	X			X	X
Doors: <DoorID>	X			X	X
Above Grade Walls: <WallID>	X			X	X
Ceilings: <CeilingID>	X			X	X
Floors: <FloorID>	X	See [13]		X	X
Infiltration			X	X	X
Internal Gains					X
Ducts				X	X
AED Excursion					X
Total				X	X

[13]

Length will be provided for a slab floor under conditioned space.

Report: <BuildingID>: AED Curve

For each HPXML Building (and any HPXML spaces, see HPXML Zones/Spaces), the hourly cooling fenestration load curve (AED curve) from 8am to 8pm is provided.

Type	Hr 8 (Btuh)	Hr 9 (Btuh)	Hr 10 (Btuh)	Hr 11 (Btuh)	Hr 12 (Btuh)	Hr 13 (Btuh)	Hr 14 (Btuh)	Hr 15 (Btuh)	Hr 16 (Btuh)	Hr 17 (Btuh)	Hr 18 (Btuh)	Hr 19 (Btuh)
<BuildingID>	X	X	X	X	X	X	X	X	X	X	X	X
<BuildingID>: <SpaceID>	X	X	X	X	X	X	X	X	X	X	X	X