pyidf.hvac_design_objects module

Data objects in group “HVAC Design Objects”

class pyidf.hvac_design_objects.DesignSpecificationOutdoorAir

Bases: pyidf.helper.DataObject

Corresponds to IDD object DesignSpecification:OutdoorAir This object is used to describe general outdoor air requirements which are referenced by other objects.

name

field Name

Parameters:value (str) – value for IDD Field Name Raises:ValueError – if value is not a valid value Returns:the value of name or None if not set Return type:str

outdoor_air_flow_air_changes_per_hour

field Outdoor Air Flow Air Changes per Hour

This input should be used if the field Outdoor Air Method is AirChanges/Hour.

This input is used if the field Outdoor Air Method is AirChanges/Hour, Sum, or Maximum

Units: 1/hr

Parameters:value (float) – value for IDD Field Outdoor Air Flow Air Changes per Hour Raises:ValueError – if value is not a valid value Returns:the value of outdoor_air_flow_air_changes_per_hour or None if not set Return type:float

outdoor_air_flow_per_person

field Outdoor Air Flow per Person

0.00944 m3/s is equivalent to 20 cfm per person

This input should be used if the field Outdoor Air Method is Flow/Person.

This input is used if the field Outdoor Air Method is Flow/Person, Sum, or Maximum

Units: m3/s-person

Default value: 0.00944

Parameters:value (float) – value for IDD Field Outdoor Air Flow per Person Raises:ValueError – if value is not a valid value Returns:the value of outdoor_air_flow_per_person or None if not set Return type:float

outdoor_air_flow_per_zone

field Outdoor Air Flow per Zone

This input should be used if the field Outdoor Air Method is Flow/Zone.

This input is used if the field Outdoor Air Method is Flow/Zone, Sum, or Maximum

Units: m3/s

Parameters:value (float) – value for IDD Field Outdoor Air Flow per Zone Raises:ValueError – if value is not a valid value Returns:the value of outdoor_air_flow_per_zone or None if not set Return type:float

outdoor_air_flow_per_zone_floor_area

field Outdoor Air Flow per Zone Floor Area

This input should be used if the field Outdoor Air Method is Flow/Area.

This input is used if the field Outdoor Air Method is Flow/Area, Sum, or Maximum

Units: m3/s-m2

Parameters:value (float) – value for IDD Field Outdoor Air Flow per Zone Floor Area Raises:ValueError – if value is not a valid value Returns:the value of outdoor_air_flow_per_zone_floor_area or None if not set Return type:float

outdoor_air_flow_rate_fraction_schedule_name

field Outdoor Air Flow Rate Fraction Schedule Name

Schedule values are multiplied by the Outdoor Air Flow rate calculated using

the previous four inputs. Schedule values are limited to 0 to 1.

Parameters:value (str) – value for IDD Field Outdoor Air Flow Rate Fraction Schedule Name Raises:ValueError – if value is not a valid value Returns:the value of outdoor_air_flow_rate_fraction_schedule_name or None if not set Return type:str

outdoor_air_method

field Outdoor Air Method

Flow/Person => Outdoor Air Flow per Person * Occupancy = Design Flow Rate,

Flow/Area => Outdoor Air Flow per Zone Floor Area * Zone Floor Area = Design Flow Rate,

Flow/Zone => Outdoor Air Flow per Zone = Design Flow Rate,

AirChanges/Hour => Outdoor Air Flow Air Changes per Hour * Zone Volume adjusted for m3/s = Design Flow Rate

Default value: Flow/Person

Parameters:value (str) – value for IDD Field Outdoor Air Method Raises:ValueError – if value is not a valid value Returns:the value of outdoor_air_method or None if not set Return type:str

class pyidf.hvac_design_objects.DesignSpecificationZoneAirDistribution

Bases: pyidf.helper.DataObject

Corresponds to IDD object DesignSpecification:ZoneAirDistribution This object is used to describe zone air distribution in terms of air distribution effectiveness and secondary recirculation fraction. It is referenced by Sizing:Zone and Controller:MechanicalVentilation objects

name

field Name

Parameters:value (str) – value for IDD Field Name Raises:ValueError – if value is not a valid value Returns:the value of name or None if not set Return type:str

zone_air_distribution_effectiveness_in_cooling_mode

field Zone Air Distribution Effectiveness in Cooling Mode

Units: dimensionless

Default value: 1.0

Parameters:value (float) – value for IDD Field Zone Air Distribution Effectiveness in Cooling Mode Raises:ValueError – if value is not a valid value Returns:the value of zone_air_distribution_effectiveness_in_cooling_mode or None if not set Return type:float

zone_air_distribution_effectiveness_in_heating_mode

field Zone Air Distribution Effectiveness in Heating Mode

Units: dimensionless

Default value: 1.0

Parameters:value (float) – value for IDD Field Zone Air Distribution Effectiveness in Heating Mode Raises:ValueError – if value is not a valid value Returns:the value of zone_air_distribution_effectiveness_in_heating_mode or None if not set Return type:float

zone_air_distribution_effectiveness_schedule_name

field Zone Air Distribution Effectiveness Schedule Name

optionally used to replace Zone Air Distribution Effectiveness in Cooling and

Heating Mode

Parameters:value (str) – value for IDD Field Zone Air Distribution Effectiveness Schedule Name Raises:ValueError – if value is not a valid value Returns:the value of zone_air_distribution_effectiveness_schedule_name or None if not set Return type:str

zone_secondary_recirculation_fraction

field Zone Secondary Recirculation Fraction

Units: dimensionless

Parameters:value (float) – value for IDD Field Zone Secondary Recirculation Fraction Raises:ValueError – if value is not a valid value Returns:the value of zone_secondary_recirculation_fraction or None if not set Return type:float

class pyidf.hvac_design_objects.DesignSpecificationZoneHvacSizing

Bases: pyidf.helper.DataObject

Corresponds to IDD object DesignSpecification:ZoneHVAC:Sizing This object is used to describe general scalable zone HVAC equipment sizing which are referenced by other objects.

cooling_design_capacity

field Cooling Design Capacity

Enter the design cooling capacity. Required field when the cooling design capacity method

CoolingDesignCapacity.

Units: W

Parameters:value (float or “Autosize”) – value for IDD Field Cooling Design Capacity Raises:ValueError – if value is not a valid value Returns:the value of cooling_design_capacity or None if not set Return type:float or “Autosize”

cooling_design_capacity_method

field Cooling Design Capacity Method

Enter the method used to determine the cooling design capacity for scalable sizing.

None is used when a cooling coils is not included in the Zone HVAC Equipment or

this field may be blank. If this input field is left blank, then the design cooling

capacity is set to zero. CoolingDesignCapacity => selected when the design cooling capacity

value is specified or auto-sized. CapacityPerFloorArea => selected when the design cooling

capacity is determine from user specified cooling capacity per floor area and zone floor area.

FractionOfAutosizedCoolingCapacity => is selected when the design cooling capacity is

determined from a user specified fraction and the auto-sized design cooling capacity.

Default value: None

Parameters:value (str) – value for IDD Field Cooling Design Capacity Method Raises:ValueError – if value is not a valid value Returns:the value of cooling_design_capacity_method or None if not set Return type:str

cooling_design_capacity_per_floor_area

field Cooling Design Capacity Per Floor Area

Enter the cooling design capacity per zone floor area. Required field when the cooling design

capacity method field is CapacityPerFloorArea.

Units: W/m2

Parameters:value (float) – value for IDD Field Cooling Design Capacity Per Floor Area Raises:ValueError – if value is not a valid value Returns:the value of cooling_design_capacity_per_floor_area or None if not set Return type:float

cooling_fraction_of_autosized_cooling_supply_air_flow_rate

field Cooling Fraction of Autosized Cooling Supply Air Flow Rate

Enter the supply air volume flow rate as a fraction of the cooling supply air flow rate.

Required field when Cooling Supply Air Flow Rate Method is

FractionOfAutosizedCoolingAirflow.

This field may be blank if a cooling coil is not included in the Zone HVAC equipment.

Parameters:value (float) – value for IDD Field Cooling Fraction of Autosized Cooling Supply Air Flow Rate Raises:ValueError – if value is not a valid value Returns:the value of cooling_fraction_of_autosized_cooling_supply_air_flow_rate or None if not set Return type:float

cooling_supply_air_flow_rate

field Cooling Supply Air Flow Rate

Enter the magnitude of supply air volume flow rate during cooling operation.

Required field when Cooling Supply Air Flow Rate Method is SupplyAirFlowRate.

This field may be blank if a cooling coil is not included in the Zone HVAC equipment.

Units: m3/s

Parameters:value (float or “Autosize”) – value for IDD Field Cooling Supply Air Flow Rate Raises:ValueError – if value is not a valid value Returns:the value of cooling_supply_air_flow_rate or None if not set Return type:float or “Autosize”

cooling_supply_air_flow_rate_method

field Cooling Supply Air Flow Rate Method

Enter the method used to determine the cooling supply air volume flow rate.

None is used when a cooling coil is not included in the Zone HVAC Equip or this field

may be blank. SupplyAirFlowRate => selected when the magnitude of the supply air volume

flow rate is specified. FlowPerFloorArea => selected when the supply air volume flow rate

is determined from total floor area served by the Zone HVAC unit and Flow Per Floor Area

value specified. FractionOfAutosizedCoolingAirflow => is selected when the supply air volume

is determined from a user specified fraction and the autosized cooling supply air flow rate

value determined by the simulation. FlowPerCoolingCapacity => is selected when the supply

air volume is determined from user specified flow per Cooling Capacity and Cooling Capacity

determined by the simulation.

Default value: SupplyAirFlowRate

Parameters:value (str) – value for IDD Field Cooling Supply Air Flow Rate Method Raises:ValueError – if value is not a valid value Returns:the value of cooling_supply_air_flow_rate_method or None if not set Return type:str

cooling_supply_air_flow_rate_per_floor_area

field Cooling Supply Air Flow Rate Per Floor Area

Enter the cooling supply air volume flow rate per total conditioned floor area.

Required field when Cooling Supply Air Flow Rate Method is FlowPerFloorArea.

This field may be blank if a cooling coil is not included in the Zone HVAC equipment.

Units: m3/s-m2

Parameters:value (float) – value for IDD Field Cooling Supply Air Flow Rate Per Floor Area Raises:ValueError – if value is not a valid value Returns:the value of cooling_supply_air_flow_rate_per_floor_area or None if not set Return type:float

cooling_supply_air_flow_rate_per_unit_cooling_capacity

field Cooling Supply Air Flow Rate Per Unit Cooling Capacity

Enter the cooling supply air volume flow rate unit cooling capacity.

Required field when Cooling Supply Air Flow Rate Method is

FlowPerCoolingCapacity. This field may be blank if a cooling coil is not

included in the Zone HVAC equipment.

Units: m3/s-W

Parameters:value (float) – value for IDD Field Cooling Supply Air Flow Rate Per Unit Cooling Capacity Raises:ValueError – if value is not a valid value Returns:the value of cooling_supply_air_flow_rate_per_unit_cooling_capacity or None if not set Return type:float

fraction_of_autosized_cooling_design_capacity

field Fraction of Autosized Cooling Design Capacity

Enter the fraction of auto-sized cooling design capacity. Required field when the cooling

design capacity method field is FractionOfAutosizedCoolingCapacity.

Parameters:value (float) – value for IDD Field Fraction of Autosized Cooling Design Capacity Raises:ValueError – if value is not a valid value Returns:the value of fraction_of_autosized_cooling_design_capacity or None if not set Return type:float

fraction_of_autosized_heating_design_capacity

field Fraction of Autosized Heating Design Capacity

Enter the fraction of auto-sized heating design capacity. Required field when capacity the

heating design capacity method field is FractionOfAutosizedHeatingCapacity.

Parameters:value (float) – value for IDD Field Fraction of Autosized Heating Design Capacity Raises:ValueError – if value is not a valid value Returns:the value of fraction_of_autosized_heating_design_capacity or None if not set Return type:float

heating_design_capacity

field Heating Design Capacity

Enter the design heating capacity. Required field when the heating design capacity method

HeatingDesignCapacity.

Units: W

Parameters:value (float or “Autosize”) – value for IDD Field Heating Design Capacity Raises:ValueError – if value is not a valid value Returns:the value of heating_design_capacity or None if not set Return type:float or “Autosize”

heating_design_capacity_method

field Heating Design Capacity Method

Enter the method used to determine the heating design capacity for scalable sizing.

None is used when a heating coil is not included in the Zone HVAC Equipment or

this field may be blank. If this input field is left blank, then the design heating

capacity is set to zero. HeatingDesignCapacity => selected when the design heating capacity

value is specified or auto-sized. CapacityPerFloorArea => selected when the design cooling

capacity is determine from user specified heating capacity per flow area and zone floor area.

FractionOfAutosizedHeatingCapacity => is selected when the design heating capacity is

determined from a user specified fraction and the auto-sized design heating capacity

Default value: None

Parameters:value (str) – value for IDD Field Heating Design Capacity Method Raises:ValueError – if value is not a valid value Returns:the value of heating_design_capacity_method or None if not set Return type:str

heating_design_capacity_per_floor_area

field Heating Design Capacity Per Floor Area

Enter the heating design capacity per zone floor area. Required field when the heating design

capacity method field is CapacityPerFloorArea.

Units: W/m2

Parameters:value (float) – value for IDD Field Heating Design Capacity Per Floor Area Raises:ValueError – if value is not a valid value Returns:the value of heating_design_capacity_per_floor_area or None if not set Return type:float

heating_fraction_of_heating_supply_air_flow_rate

field Heating Fraction of Heating Supply Air Flow Rate

Enter the supply air volume flow rate as a fraction of the heating supply air flow rate.

Required field when Heating Supply Air Flow Rate Method is

FractionOfAutosizedHeatingAirflow.

This field may be blank if a heating coil is not included in the Zone HVAC equipment.

Parameters:value (float) – value for IDD Field Heating Fraction of Heating Supply Air Flow Rate Raises:ValueError – if value is not a valid value Returns:the value of heating_fraction_of_heating_supply_air_flow_rate or None if not set Return type:float

heating_supply_air_flow_rate

field Heating Supply Air Flow Rate

Enter the magnitude of the supply air volume flow rate during heating operation.

Required field when Heating Supply Air Flow Rate Method is SupplyAirFlowRate.

This field may be blank if a heating coil is not included in the Zone HVAC equipment.

Units: m3/s

Parameters:value (float or “Autosize”) – value for IDD Field Heating Supply Air Flow Rate Raises:ValueError – if value is not a valid value Returns:the value of heating_supply_air_flow_rate or None if not set Return type:float or “Autosize”

heating_supply_air_flow_rate_method

field Heating Supply Air Flow Rate Method

Enter the method used to determine the heating supply air volume flow rate.

None is used when a heating coil is not included in the Zone HVAC Equipment or this field may

be blank. SupplyAirFlowRate => selected when the magnitude of the heating supply air volume

flow rate is specified. FlowPerFloorArea => selected when the supply air volume flow rate is

determined from total floor area served by a Zone HVAC unit and user specified value of Flow

Per Floor Area. FractionOfAutosizedHeatingAirflow => is selected when the supply air volume

is determined from a user specified fraction and the Autosized heating supply air flow rate

value determined by the simulation. FlowPerHeatingCapacity => is selected when the supply

air volume is determined from user specified flow per Heating Capacity and Heating Capacity

determined by the simulation.

Default value: SupplyAirFlowRate

Parameters:value (str) – value for IDD Field Heating Supply Air Flow Rate Method Raises:ValueError – if value is not a valid value Returns:the value of heating_supply_air_flow_rate_method or None if not set Return type:str

heating_supply_air_flow_rate_per_floor_area

field Heating Supply Air Flow Rate Per Floor Area

Enter the heating supply air volume flow rate per total conditioned floor area.

Required field when Heating Supply Air Flow Rate Method is FlowPerFloorArea.

This field may be blank if a heating coil is not included in the Zone HVAC equipment.

Units: m3/s-m2

Parameters:value (float) – value for IDD Field Heating Supply Air Flow Rate Per Floor Area Raises:ValueError – if value is not a valid value Returns:the value of heating_supply_air_flow_rate_per_floor_area or None if not set Return type:float

heating_supply_air_flow_rate_per_unit_heating_capacity

field Heating Supply Air Flow Rate Per Unit Heating Capacity

Enter the supply air volume flow rate per unit heating capacity.

Required field when Heating Supply Air Flow Rate Method is

FlowPerHeatingCapacity.

This field may be blank if a heating coil is not included in the Zone HVAC equipment.

Units: m3/s-W

Parameters:value (float) – value for IDD Field Heating Supply Air Flow Rate Per Unit Heating Capacity Raises:ValueError – if value is not a valid value Returns:the value of heating_supply_air_flow_rate_per_unit_heating_capacity or None if not set Return type:float

name

field Name

Parameters:value (str) – value for IDD Field Name Raises:ValueError – if value is not a valid value Returns:the value of name or None if not set Return type:str

no_load_fraction_of_cooling_supply_air_flow_rate

field No Load Fraction of Cooling Supply Air Flow Rate

Enter the supply air volume flow rate as a fraction of the cooling supply air flow rate.

Required field when No Load Supply Air Flow Rate Method

is FractionOfAutosizedCoolingAirflow.

Parameters:value (float) – value for IDD Field No Load Fraction of Cooling Supply Air Flow Rate Raises:ValueError – if value is not a valid value Returns:the value of no_load_fraction_of_cooling_supply_air_flow_rate or None if not set Return type:float

no_load_fraction_of_heating_supply_air_flow_rate

field No Load Fraction of Heating Supply Air Flow Rate

Enter the supply air volume flow rate as a fraction of the heating supply air flow rate.

Required field when No Load Supply Air Flow Rate Method

is FractionOfAutosizedHeatingAirflow.

Parameters:value (float) – value for IDD Field No Load Fraction of Heating Supply Air Flow Rate Raises:ValueError – if value is not a valid value Returns:the value of no_load_fraction_of_heating_supply_air_flow_rate or None if not set Return type:float

no_load_supply_air_flow_rate

field No Load Supply Air Flow Rate

Enter the magnitude of the supply air volume flow rate during when no cooling or heating

is required. Required field when No Load Supply Air Flow Rate Method

is SupplyAirFlowRate.

Units: m3/s

Parameters:value (float or “Autosize”) – value for IDD Field No Load Supply Air Flow Rate Raises:ValueError – if value is not a valid value Returns:the value of no_load_supply_air_flow_rate or None if not set Return type:float or “Autosize”

no_load_supply_air_flow_rate_method

field No Load Supply Air Flow Rate Method

Enter the method used to determine the supply air volume flow rate When No Cooling or Heating

is Required. None is used when a cooling or heating coil is not included in the Zone HVAC

Equipment or this field may be blank. SupplyAirFlowRate => selected when the magnitude of the

supply air volume flow rate is specified. FlowPerFloorArea => selected when the supply air

volume flow rate is determined from total floor area served by the Zone HVAC unit and Flow Per

Floor Area is specified. FractionOfAutosizedCoolingAirflow => is selected when the supply

air volume is determined from a user specified fraction and the Autosized cooling supply

air flow rate value determined by the simulation. FractionOfAutosizedHeatingAirflow => is

selected when the supply air volume is determined from a user specified fraction and the

Autosized heating supply air flow rate value determined by the simulation.

Default value: SupplyAirFlowRate

Parameters:value (str) – value for IDD Field No Load Supply Air Flow Rate Method Raises:ValueError – if value is not a valid value Returns:the value of no_load_supply_air_flow_rate_method or None if not set Return type:str

no_load_supply_air_flow_rate_per_floor_area

field No Load Supply Air Flow Rate Per Floor Area

Enter the supply air volume flow rate per total floor area.

Required field when No Load Supply Air Flow Rate Method

is FlowPerFloorArea.

Units: m3/s-m2

Parameters:value (float) – value for IDD Field No Load Supply Air Flow Rate Per Floor Area Raises:ValueError – if value is not a valid value Returns:the value of no_load_supply_air_flow_rate_per_floor_area or None if not set Return type:float

class pyidf.hvac_design_objects.OutputControlSizingStyle

Bases: pyidf.helper.DataObject

Corresponds to IDD object OutputControl:Sizing:Style Default style for the Sizing output files is comma – this works well for importing into spreadsheet programs such as Excel(tm) but not so well for word processing programs – there tab may be a better choice. Fixed puts spaces between the “columns”

column_separator

field Column Separator

Parameters:value (str) – value for IDD Field Column Separator Raises:ValueError – if value is not a valid value Returns:the value of column_separator or None if not set Return type:str

class pyidf.hvac_design_objects.SizingParameters

Bases: pyidf.helper.DataObject

Corresponds to IDD object Sizing:Parameters Specifies global heating and cooling sizing factors/ratios. These ratios are applied at the zone level to all of the zone heating and cooling loads and air flow rates. Then these new loads and air flow rates are used to calculate the system level flow rates and capacities and are used in all component sizing calculations. Specifies the width (in load timesteps) of a moving average window which is used to smooth the peak load across more than one timestep.

cooling_sizing_factor

field Cooling Sizing Factor

Default value: 1.0

Parameters:value (float) – value for IDD Field Cooling Sizing Factor Raises:ValueError – if value is not a valid value Returns:the value of cooling_sizing_factor or None if not set Return type:float

heating_sizing_factor

field Heating Sizing Factor

Default value: 1.0

Parameters:value (float) – value for IDD Field Heating Sizing Factor Raises:ValueError – if value is not a valid value Returns:the value of heating_sizing_factor or None if not set Return type:float

timesteps_in_averaging_window

field Timesteps in Averaging Window

blank => set the timesteps in averaging window to

Number of Timesteps per Hour resulting in a 1 hour averaging window

default is number of timesteps for 1 hour averaging window

value >= 1

Parameters:value (int) – value for IDD Field Timesteps in Averaging Window Raises:ValueError – if value is not a valid value Returns:the value of timesteps_in_averaging_window or None if not set Return type:int

class pyidf.hvac_design_objects.SizingPlant

Bases: pyidf.helper.DataObject

Corresponds to IDD object Sizing:Plant Specifies the input needed to autosize plant loop flow rates and equipment capacities. This information is initially used by components that use water for heating or cooling such as hot or chilled water coils to calculate their maximum water flow rates. These flow rates are then summed for use in calculating the Plant Loop flow rates.

coincident_sizing_factor_mode

field Coincident Sizing Factor Mode

this is used to adjust the result for coincident sizing by applying a sizing factor

Parameters:value (str) – value for IDD Field Coincident Sizing Factor Mode Raises:ValueError – if value is not a valid value Returns:the value of coincident_sizing_factor_mode or None if not set Return type:str

design_loop_exit_temperature

field Design Loop Exit Temperature

Units: C

Parameters:value (float) – value for IDD Field Design Loop Exit Temperature Raises:ValueError – if value is not a valid value Returns:the value of design_loop_exit_temperature or None if not set Return type:float

loop_design_temperature_difference

field Loop Design Temperature Difference

Units: deltaC

Parameters:value (float) – value for IDD Field Loop Design Temperature Difference Raises:ValueError – if value is not a valid value Returns:the value of loop_design_temperature_difference or None if not set Return type:float

loop_type

field Loop Type

Parameters:value (str) – value for IDD Field Loop Type Raises:ValueError – if value is not a valid value Returns:the value of loop_type or None if not set Return type:str

plant_or_condenser_loop_name

field Plant or Condenser Loop Name

Enter the name of a PlantLoop or a CondenserLoop object

Parameters:value (str) – value for IDD Field Plant or Condenser Loop Name Raises:ValueError – if value is not a valid value Returns:the value of plant_or_condenser_loop_name or None if not set Return type:str

sizing_option

field Sizing Option

if Coincident is chosen, then sizing is based on HVAC Sizing Simulations and

the input field called Do HVAC Sizing Simulation for Sizing Periods in SimulationControl must be set to Yes

Default value: NonCoincident

Parameters:value (str) – value for IDD Field Sizing Option Raises:ValueError – if value is not a valid value Returns:the value of sizing_option or None if not set Return type:str

zone_timesteps_in_averaging_window

field Zone Timesteps in Averaging Window

this is used in the coincident sizing algorithm to apply a running average to peak flow rates

that occur during HVAC Sizing Simulations

Default value: 1

value >= 1

Parameters:value (int) – value for IDD Field Zone Timesteps in Averaging Window Raises:ValueError – if value is not a valid value Returns:the value of zone_timesteps_in_averaging_window or None if not set Return type:int

class pyidf.hvac_design_objects.SizingSystem

Bases: pyidf.helper.DataObject

Corresponds to IDD object Sizing:System Specifies the input needed to perform sizing calculations for a central forced air system. System design air flow, heating capacity, and cooling capacity will be calculated using this input data.

a_100_outdoor_air_in_cooling

field 100% Outdoor Air in Cooling

Default value: No

Parameters:value (str) – value for IDD Field 100% Outdoor Air in Cooling Raises:ValueError – if value is not a valid value Returns:the value of a_100_outdoor_air_in_cooling or None if not set Return type:str

a_100_outdoor_air_in_heating

field 100% Outdoor Air in Heating

Default value: No

Parameters:value (str) – value for IDD Field 100% Outdoor Air in Heating Raises:ValueError – if value is not a valid value Returns:the value of a_100_outdoor_air_in_heating or None if not set Return type:str

airloop_name

field AirLoop Name

Parameters:value (str) – value for IDD Field AirLoop Name Raises:ValueError – if value is not a valid value Returns:the value of airloop_name or None if not set Return type:str

central_cooling_capacity_control_method

field Central Cooling Capacity Control Method

Method used to control the coil’s output

Default value: OnOff

Parameters:value (str) – value for IDD Field Central Cooling Capacity Control Method Raises:ValueError – if value is not a valid value Returns:the value of central_cooling_capacity_control_method or None if not set Return type:str

central_cooling_design_supply_air_humidity_ratio

field Central Cooling Design Supply Air Humidity Ratio

Units: kgWater/kgDryAir

Default value: 0.008

Parameters:value (float) – value for IDD Field Central Cooling Design Supply Air Humidity Ratio Raises:ValueError – if value is not a valid value Returns:the value of central_cooling_design_supply_air_humidity_ratio or None if not set Return type:float

central_cooling_design_supply_air_temperature

field Central Cooling Design Supply Air Temperature

Units: C

Parameters:value (float) – value for IDD Field Central Cooling Design Supply Air Temperature Raises:ValueError – if value is not a valid value Returns:the value of central_cooling_design_supply_air_temperature or None if not set Return type:float

central_heating_design_supply_air_humidity_ratio

field Central Heating Design Supply Air Humidity Ratio

Units: kgWater/kgDryAir

Default value: 0.008

Parameters:value (float) – value for IDD Field Central Heating Design Supply Air Humidity Ratio Raises:ValueError – if value is not a valid value Returns:the value of central_heating_design_supply_air_humidity_ratio or None if not set Return type:float

central_heating_design_supply_air_temperature

field Central Heating Design Supply Air Temperature

Units: C

Parameters:value (float) – value for IDD Field Central Heating Design Supply Air Temperature Raises:ValueError – if value is not a valid value Returns:the value of central_heating_design_supply_air_temperature or None if not set Return type:float

central_heating_maximum_system_air_flow_ratio

field Central Heating Maximum System Air Flow Ratio

Default value: 0.5

value <= 1.0

Parameters:value (float) – value for IDD Field Central Heating Maximum System Air Flow Ratio Raises:ValueError – if value is not a valid value Returns:the value of central_heating_maximum_system_air_flow_ratio or None if not set Return type:float

cooling_design_capacity

field Cooling Design Capacity

Enter the design cooling capacity.

Units: W

Default value: “autosize”

Parameters:value (float or “Autosize”) – value for IDD Field Cooling Design Capacity Raises:ValueError – if value is not a valid value Returns:the value of cooling_design_capacity or None if not set Return type:float or “Autosize”

cooling_design_capacity_method

field Cooling Design Capacity Method

Enter the method used to determine the system cooling design capacity for scalable sizing.

None is used when a cooling coils is not included in an airloop or this field may be blank.

If this input field is left blank, then the design cooling capacity is set to zero.

CoolingDesignCapacity => selected when the design cooling capacity value is specified or

auto-sized. CapacityPerFloorArea => selected when the design cooling capacity is determined

from user specified cooling capacity per floor area and total floor area of cooled zones

served by an airloop. FractionOfAutosizedCoolingCapacity => is selected when the design

cooling capacity is determined from a user specified fraction and the auto-sized design

cooling capacity of the system.

Default value: CoolingDesignCapacity

Parameters:value (str) – value for IDD Field Cooling Design Capacity Method Raises:ValueError – if value is not a valid value Returns:the value of cooling_design_capacity_method or None if not set Return type:str

cooling_design_capacity_per_floor_area

field Cooling Design Capacity Per Floor Area

Enter the cooling design capacity per total floor area of cooled zones served by an airloop.

Required field when the cooling design capacity method field is CapacityPerFloorArea.

Units: W/m2

Parameters:value (float) – value for IDD Field Cooling Design Capacity Per Floor Area Raises:ValueError – if value is not a valid value Returns:the value of cooling_design_capacity_per_floor_area or None if not set Return type:float

cooling_fraction_of_autosized_cooling_supply_air_flow_rate

field Cooling Fraction of Autosized Cooling Supply Air Flow Rate

Enter the supply air volume flow rate as a fraction of the cooling supply air flow rate.

Required field when Cooling Supply Air Flow Rate Method is

FractionOfAutosizedCoolingAirflow.

Parameters:value (float) – value for IDD Field Cooling Fraction of Autosized Cooling Supply Air Flow Rate Raises:ValueError – if value is not a valid value Returns:the value of cooling_fraction_of_autosized_cooling_supply_air_flow_rate or None if not set Return type:float

cooling_supply_air_flow_rate

field Cooling Supply Air Flow Rate

This input is used if Cooling Supply Air Flow Rate Method is Flow/System

This value will not be multiplied by any sizing factor or by zone multipliers.

If using zone multipliers, this value must be large enough to serve the multiplied zones.

Units: m3/s

Parameters:value (float) – value for IDD Field Cooling Supply Air Flow Rate Raises:ValueError – if value is not a valid value Returns:the value of cooling_supply_air_flow_rate or None if not set Return type:float

cooling_supply_air_flow_rate_method

field Cooling Supply Air Flow Rate Method

Default value: DesignDay

Parameters:value (str) – value for IDD Field Cooling Supply Air Flow Rate Method Raises:ValueError – if value is not a valid value Returns:the value of cooling_supply_air_flow_rate_method or None if not set Return type:str

cooling_supply_air_flow_rate_per_floor_area

field Cooling Supply Air Flow Rate Per Floor Area

Enter the cooling supply air volume flow rate per total conditioned floor area.

Required field when Cooling Supply Air Flow Rate Method is FlowPerFloorArea.

Units: m3/s-m2

Parameters:value (float) – value for IDD Field Cooling Supply Air Flow Rate Per Floor Area Raises:ValueError – if value is not a valid value Returns:the value of cooling_supply_air_flow_rate_per_floor_area or None if not set Return type:float

cooling_supply_air_flow_rate_per_unit_cooling_capacity

field Cooling Supply Air Flow Rate Per Unit Cooling Capacity

Enter the supply air volume flow rate per unit cooling capacity.

Required field when Cooling Supply Air Flow Rate Method is

FlowPerCoolingCapacity.

Units: m3/s-W

Parameters:value (float) – value for IDD Field Cooling Supply Air Flow Rate Per Unit Cooling Capacity Raises:ValueError – if value is not a valid value Returns:the value of cooling_supply_air_flow_rate_per_unit_cooling_capacity or None if not set Return type:float

design_outdoor_air_flow_rate

field Design Outdoor Air Flow Rate

Units: m3/s

Default value: “autosize”

Parameters:value (float or “Autosize”) – value for IDD Field Design Outdoor Air Flow Rate Raises:ValueError – if value is not a valid value Returns:the value of design_outdoor_air_flow_rate or None if not set Return type:float or “Autosize”

fraction_of_autosized_cooling_design_capacity

field Fraction of Autosized Cooling Design Capacity

Enter the fraction of auto-sized cooling design capacity. Required field when the cooling

design capacity method field is FractionOfAutosizedCoolingCapacity.

Parameters:value (float) – value for IDD Field Fraction of Autosized Cooling Design Capacity Raises:ValueError – if value is not a valid value Returns:the value of fraction_of_autosized_cooling_design_capacity or None if not set Return type:float

fraction_of_autosized_heating_design_capacity

field Fraction of Autosized Heating Design Capacity

Enter the fraction of auto-sized heating design capacity. Required field when capacity the

heating design capacity method field is FractionOfAutosizedHeatingCapacity.

Parameters:value (float) – value for IDD Field Fraction of Autosized Heating Design Capacity Raises:ValueError – if value is not a valid value Returns:the value of fraction_of_autosized_heating_design_capacity or None if not set Return type:float

heating_design_capacity

field Heating Design Capacity

Enter the design heating capacity.

Units: W

Default value: “autosize”

Parameters:value (float or “Autosize”) – value for IDD Field Heating Design Capacity Raises:ValueError – if value is not a valid value Returns:the value of heating_design_capacity or None if not set Return type:float or “Autosize”

heating_design_capacity_method

field Heating Design Capacity Method

Enter the method used to determine the heating design capacity for scalable sizing.

None is used when a heating coil not included in an airloop or this field may be blank.

If this input field is left blank, then the design heating capacity is set to zero.

HeatingDesignCapacity => selected when the design heating capacity value is specified or

auto-sized. CapacityPerFloorArea => selected when the design heating capacity is determined

from user specified heating capacity per flow area and total floor area of heated zones

served by an airloop. FractionOfAutosizedHeatingCapacity => is selected when the design

heating capacity is determined from a user specified fraction and the auto-sized design

heating capacity of the system.

Default value: HeatingDesignCapacity

Parameters:value (str) – value for IDD Field Heating Design Capacity Method Raises:ValueError – if value is not a valid value Returns:the value of heating_design_capacity_method or None if not set Return type:str

heating_design_capacity_per_floor_area

field Heating Design Capacity Per Floor Area

Enter the heating design capacity per zone floor area. Required field when the heating design

capacity method field is CapacityPerFloorArea.

Units: W/m2

Parameters:value (float) – value for IDD Field Heating Design Capacity Per Floor Area Raises:ValueError – if value is not a valid value Returns:the value of heating_design_capacity_per_floor_area or None if not set Return type:float

heating_fraction_of_autosized_cooling_supply_air_flow_rate

field Heating Fraction of Autosized Cooling Supply Air Flow Rate

Enter the supply air volume flow rate as a fraction of the cooling supply air flow rate.

Required field when Heating Supply Air Flow Rate Method is

FractionOfAutosizedCoolingAirflow.

Parameters:value (float) – value for IDD Field Heating Fraction of Autosized Cooling Supply Air Flow Rate Raises:ValueError – if value is not a valid value Returns:the value of heating_fraction_of_autosized_cooling_supply_air_flow_rate or None if not set Return type:float

heating_fraction_of_autosized_heating_supply_air_flow_rate

field Heating Fraction of Autosized Heating Supply Air Flow Rate

Enter the supply air volume flow rate as a fraction of the heating supply air flow rate.

Required field when Heating Supply Air Flow Rate Method is

FractionOfAutosizedHeatingAirflow.

Parameters:value (float) – value for IDD Field Heating Fraction of Autosized Heating Supply Air Flow Rate Raises:ValueError – if value is not a valid value Returns:the value of heating_fraction_of_autosized_heating_supply_air_flow_rate or None if not set Return type:float

heating_supply_air_flow_rate

field Heating Supply Air Flow Rate

Required field when Heating Supply Air Flow Rate Method is Flow/System

This value will not be multiplied by any sizing factor or by zone multipliers.

If using zone multipliers, this value must be large enough to serve the multiplied zones.

Units: m3/s

Parameters:value (float) – value for IDD Field Heating Supply Air Flow Rate Raises:ValueError – if value is not a valid value Returns:the value of heating_supply_air_flow_rate or None if not set Return type:float

heating_supply_air_flow_rate_method

field Heating Supply Air Flow Rate Method

Default value: DesignDay

Parameters:value (str) – value for IDD Field Heating Supply Air Flow Rate Method Raises:ValueError – if value is not a valid value Returns:the value of heating_supply_air_flow_rate_method or None if not set Return type:str

heating_supply_air_flow_rate_per_floor_area

field Heating Supply Air Flow Rate Per Floor Area

Enter the heating supply air volume flow rate per total conditioned floor area.

Required field when Heating Supply Air Flow Rate Method is FlowPerFloorArea.

Units: m3/s-m2

Parameters:value (float) – value for IDD Field Heating Supply Air Flow Rate Per Floor Area Raises:ValueError – if value is not a valid value Returns:the value of heating_supply_air_flow_rate_per_floor_area or None if not set Return type:float

heating_supply_air_flow_rate_per_unit_heating_capacity

field Heating Supply Air Flow Rate Per Unit Heating Capacity

Enter the heating supply air volume flow rate per unit heating capacity.

Required field when Heating Supply Air Flow Rate Method is

FlowPerHeatingCapacity.

Units: m3/s-W

Parameters:value (float) – value for IDD Field Heating Supply Air Flow Rate Per Unit Heating Capacity Raises:ValueError – if value is not a valid value Returns:the value of heating_supply_air_flow_rate_per_unit_heating_capacity or None if not set Return type:float

precool_design_humidity_ratio

field Precool Design Humidity Ratio

Units: kgWater/kgDryAir

Parameters:value (float) – value for IDD Field Precool Design Humidity Ratio Raises:ValueError – if value is not a valid value Returns:the value of precool_design_humidity_ratio or None if not set Return type:float

precool_design_temperature

field Precool Design Temperature

Units: C

Parameters:value (float) – value for IDD Field Precool Design Temperature Raises:ValueError – if value is not a valid value Returns:the value of precool_design_temperature or None if not set Return type:float

preheat_design_humidity_ratio

field Preheat Design Humidity Ratio

Units: kgWater/kgDryAir

Parameters:value (float) – value for IDD Field Preheat Design Humidity Ratio Raises:ValueError – if value is not a valid value Returns:the value of preheat_design_humidity_ratio or None if not set Return type:float

preheat_design_temperature

field Preheat Design Temperature

Units: C

Parameters:value (float) – value for IDD Field Preheat Design Temperature Raises:ValueError – if value is not a valid value Returns:the value of preheat_design_temperature or None if not set Return type:float

system_outdoor_air_method

field System Outdoor Air Method

Default value: ZoneSum

Parameters:value (str) – value for IDD Field System Outdoor Air Method Raises:ValueError – if value is not a valid value Returns:the value of system_outdoor_air_method or None if not set Return type:str

type_of_load_to_size_on

field Type of Load to Size On

Specifies the basis for sizing the system supply air flow rate

Sensible and VentilationRequirement are the only available options

Sensible uses the zone design air flow rates

VentilationRequirement uses the system ventilation requirement

Default value: Sensible

Parameters:value (str) – value for IDD Field Type of Load to Size On Raises:ValueError – if value is not a valid value Returns:the value of type_of_load_to_size_on or None if not set Return type:str

type_of_zone_sum_to_use

field Type of Zone Sum to Use

Default value: NonCoincident

Parameters:value (str) – value for IDD Field Type of Zone Sum to Use Raises:ValueError – if value is not a valid value Returns:the value of type_of_zone_sum_to_use or None if not set Return type:str

zone_maximum_outdoor_air_fraction

field Zone Maximum Outdoor Air Fraction

Units: dimensionless

Default value: 1.0

Parameters:value (float) – value for IDD Field Zone Maximum Outdoor Air Fraction Raises:ValueError – if value is not a valid value Returns:the value of zone_maximum_outdoor_air_fraction or None if not set Return type:float

class pyidf.hvac_design_objects.SizingZone

Bases: pyidf.helper.DataObject

Corresponds to IDD object Sizing:Zone Specifies the data needed to perform a zone design air flow calculation. The calculation is done for every sizing period included in the input. The maximum cooling and heating load and cooling, heating, and ventilation air flows are then saved for system level and zone component design calculations.

account_for_dedicated_outdoor_air_system

field Account for Dedicated Outdoor Air System

account for effect of dedicated outdoor air system supplying air directly to the zone

Default value: No

Parameters:value (str) – value for IDD Field Account for Dedicated Outdoor Air System Raises:ValueError – if value is not a valid value Returns:the value of account_for_dedicated_outdoor_air_system or None if not set Return type:str

cooling_design_air_flow_method

field Cooling Design Air Flow Method

Default value: DesignDay

Parameters:value (str) – value for IDD Field Cooling Design Air Flow Method Raises:ValueError – if value is not a valid value Returns:the value of cooling_design_air_flow_method or None if not set Return type:str

cooling_design_air_flow_rate

field Cooling Design Air Flow Rate

This input is used if Cooling Design Air Flow Method is Flow/Zone

This value will be multiplied by the global or zone sizing factor and

by zone multipliers.

Units: m3/s

Parameters:value (float) – value for IDD Field Cooling Design Air Flow Rate Raises:ValueError – if value is not a valid value Returns:the value of cooling_design_air_flow_rate or None if not set Return type:float

cooling_minimum_air_flow

field Cooling Minimum Air Flow

This input is used if Cooling Design Air Flow Method is DesignDayWithLimit

Units: m3/s

Parameters:value (float) – value for IDD Field Cooling Minimum Air Flow Raises:ValueError – if value is not a valid value Returns:the value of cooling_minimum_air_flow or None if not set Return type:float

cooling_minimum_air_flow_fraction

field Cooling Minimum Air Flow Fraction

fraction of the Cooling design Air Flow Rate

This input is currently used in sizing the Fan minimum Flow Rate.

It does not currently affect other component autosizing.

Parameters:value (float) – value for IDD Field Cooling Minimum Air Flow Fraction Raises:ValueError – if value is not a valid value Returns:the value of cooling_minimum_air_flow_fraction or None if not set Return type:float

cooling_minimum_air_flow_per_zone_floor_area

field Cooling Minimum Air Flow per Zone Floor Area

default is .15 cfm/ft2

This input is used if Cooling Design Air Flow Method is DesignDayWithLimit

Units: m3/s-m2

Default value: 0.000762

Parameters:value (float) – value for IDD Field Cooling Minimum Air Flow per Zone Floor Area Raises:ValueError – if value is not a valid value Returns:the value of cooling_minimum_air_flow_per_zone_floor_area or None if not set Return type:float

dedicated_outdoor_air_high_setpoint_temperature_for_design

field Dedicated Outdoor Air High Setpoint Temperature for Design

Units: C

Default value: “autosize”

Parameters:value (float or “Autosize”) – value for IDD Field Dedicated Outdoor Air High Setpoint Temperature for Design Raises:ValueError – if value is not a valid value Returns:the value of dedicated_outdoor_air_high_setpoint_temperature_for_design or None if not set Return type:float or “Autosize”

dedicated_outdoor_air_low_setpoint_temperature_for_design

field Dedicated Outdoor Air Low Setpoint Temperature for Design

Units: C

Default value: “autosize”

Parameters:value (float or “Autosize”) – value for IDD Field Dedicated Outdoor Air Low Setpoint Temperature for Design Raises:ValueError – if value is not a valid value Returns:the value of dedicated_outdoor_air_low_setpoint_temperature_for_design or None if not set Return type:float or “Autosize”

dedicated_outdoor_air_system_control_strategy

field Dedicated Outdoor Air System Control Strategy

1)supply neutral ventilation air; 2)supply neutral dehumidified and reheated

ventilation air; 3)supply cold ventilation air

Default value: NeutralSupplyAir

Parameters:value (str) – value for IDD Field Dedicated Outdoor Air System Control Strategy Raises:ValueError – if value is not a valid value Returns:the value of dedicated_outdoor_air_system_control_strategy or None if not set Return type:str

design_specification_outdoor_air_object_name

field Design Specification Outdoor Air Object Name

Parameters:value (str) – value for IDD Field Design Specification Outdoor Air Object Name Raises:ValueError – if value is not a valid value Returns:the value of design_specification_outdoor_air_object_name or None if not set Return type:str

design_specification_zone_air_distribution_object_name

field Design Specification Zone Air Distribution Object Name

Parameters:value (str) – value for IDD Field Design Specification Zone Air Distribution Object Name Raises:ValueError – if value is not a valid value Returns:the value of design_specification_zone_air_distribution_object_name or None if not set Return type:str

heating_design_air_flow_method

field Heating Design Air Flow Method

Default value: DesignDay

Parameters:value (str) – value for IDD Field Heating Design Air Flow Method Raises:ValueError – if value is not a valid value Returns:the value of heating_design_air_flow_method or None if not set Return type:str

heating_design_air_flow_rate

field Heating Design Air Flow Rate

This input is used if Heating Design Air Flow Method is Flow/Zone.

This value will be multiplied by the global or zone sizing factor and

by zone multipliers.

Units: m3/s

Parameters:value (float) – value for IDD Field Heating Design Air Flow Rate Raises:ValueError – if value is not a valid value Returns:the value of heating_design_air_flow_rate or None if not set Return type:float

heating_maximum_air_flow

field Heating Maximum Air Flow

default is 300 cfm

This input is used for autosizing components when Heating Design Air Flow Method = DesignDayWithLimit.

Units: m3/s

Default value: 0.1415762

Parameters:value (float) – value for IDD Field Heating Maximum Air Flow Raises:ValueError – if value is not a valid value Returns:the value of heating_maximum_air_flow or None if not set Return type:float

heating_maximum_air_flow_fraction

field Heating Maximum Air Flow Fraction

fraction of the Heating Design Air Flow Rate

This input is used for autosizing components when Heating Design Air Flow Method = DesignDayWithLimit.

Default value: 0.3

Parameters:value (float) – value for IDD Field Heating Maximum Air Flow Fraction Raises:ValueError – if value is not a valid value Returns:the value of heating_maximum_air_flow_fraction or None if not set Return type:float

heating_maximum_air_flow_per_zone_floor_area

field Heating Maximum Air Flow per Zone Floor Area

default is .40 cfm/ft2

This field is used to size the heating design flow rate when Heating Design Air Flow Method = Flow/Zone.

This input is used for autosizing components when Heating Design Air Flow Method = DesignDayWithLimit.

Units: m3/s-m2

Default value: 0.002032

Parameters:value (float) – value for IDD Field Heating Maximum Air Flow per Zone Floor Area Raises:ValueError – if value is not a valid value Returns:the value of heating_maximum_air_flow_per_zone_floor_area or None if not set Return type:float

zone_cooling_design_supply_air_humidity_ratio

field Zone Cooling Design Supply Air Humidity Ratio

Units: kgWater/kgDryAir

Parameters:value (float) – value for IDD Field Zone Cooling Design Supply Air Humidity Ratio Raises:ValueError – if value is not a valid value Returns:the value of zone_cooling_design_supply_air_humidity_ratio or None if not set Return type:float

zone_cooling_design_supply_air_temperature

field Zone Cooling Design Supply Air Temperature

Zone Cooling Design Supply Air Temperature is only used when Zone Cooling Design

Supply Air Temperature Input Method = SupplyAirTemperature

Units: C

Parameters:value (float) – value for IDD Field Zone Cooling Design Supply Air Temperature Raises:ValueError – if value is not a valid value Returns:the value of zone_cooling_design_supply_air_temperature or None if not set Return type:float

zone_cooling_design_supply_air_temperature_difference

field Zone Cooling Design Supply Air Temperature Difference

Zone Cooling Design Supply Air Temperature is only used when Zone Cooling Design

Supply Air Temperature Input Method = TemperatureDifference

The absolute value of this field will be subtracted from the zone temperature

at peak load to calculate the Zone Cooling Design Supply Air Temperature.

Units: deltaC

Parameters:value (float) – value for IDD Field Zone Cooling Design Supply Air Temperature Difference Raises:ValueError – if value is not a valid value Returns:the value of zone_cooling_design_supply_air_temperature_difference or None if not set Return type:float

zone_cooling_design_supply_air_temperature_input_method

field Zone Cooling Design Supply Air Temperature Input Method

Default value: SupplyAirTemperature

Parameters:value (str) – value for IDD Field Zone Cooling Design Supply Air Temperature Input Method Raises:ValueError – if value is not a valid value Returns:the value of zone_cooling_design_supply_air_temperature_input_method or None if not set Return type:str

zone_cooling_sizing_factor

field Zone Cooling Sizing Factor

if blank or zero, global cooling sizing factor from Sizing:Parameters is used.

Parameters:value (float) – value for IDD Field Zone Cooling Sizing Factor Raises:ValueError – if value is not a valid value Returns:the value of zone_cooling_sizing_factor or None if not set Return type:float

zone_heating_design_supply_air_humidity_ratio

field Zone Heating Design Supply Air Humidity Ratio

Units: kgWater/kgDryAir

Parameters:value (float) – value for IDD Field Zone Heating Design Supply Air Humidity Ratio Raises:ValueError – if value is not a valid value Returns:the value of zone_heating_design_supply_air_humidity_ratio or None if not set Return type:float

zone_heating_design_supply_air_temperature

field Zone Heating Design Supply Air Temperature

Zone Heating Design Supply Air Temperature is only used when Zone Heating Design

Supply Air Temperature Input Method = SupplyAirTemperature

Units: C

Parameters:value (float) – value for IDD Field Zone Heating Design Supply Air Temperature Raises:ValueError – if value is not a valid value Returns:the value of zone_heating_design_supply_air_temperature or None if not set Return type:float

zone_heating_design_supply_air_temperature_difference

field Zone Heating Design Supply Air Temperature Difference

Zone Heating Design Supply Air Temperature is only used when Zone Heating Design

Supply Air Temperature Input Method = TemperatureDifference

The absolute value of this field will be added to the zone temperature

at peak load to calculate the Zone Heating Design Supply Air Temperature.

Units: deltaC

Parameters:value (float) – value for IDD Field Zone Heating Design Supply Air Temperature Difference Raises:ValueError – if value is not a valid value Returns:the value of zone_heating_design_supply_air_temperature_difference or None if not set Return type:float

zone_heating_design_supply_air_temperature_input_method

field Zone Heating Design Supply Air Temperature Input Method

Default value: SupplyAirTemperature

Parameters:value (str) – value for IDD Field Zone Heating Design Supply Air Temperature Input Method Raises:ValueError – if value is not a valid value Returns:the value of zone_heating_design_supply_air_temperature_input_method or None if not set Return type:str

zone_heating_sizing_factor

field Zone Heating Sizing Factor

if blank or zero, global heating sizing factor from Sizing:Parameters is used.

Parameters:value (float) – value for IDD Field Zone Heating Sizing Factor Raises:ValueError – if value is not a valid value Returns:the value of zone_heating_sizing_factor or None if not set Return type:float

zone_or_zonelist_name

field Zone or ZoneList Name

Parameters:value (str) – value for IDD Field Zone or ZoneList Name Raises:ValueError – if value is not a valid value Returns:the value of zone_or_zonelist_name or None if not set Return type:str