HVACTEMPLATE:ZONE:IDEALLOADSAIRSYSTEM

Zone with ideal air system that meets heating or cooling loads

Zone Name

Type: list of objects ( or ZONE)
Zone name must match a building zone name

Template Thermostat Name

Type: list of objects ( or HVACTEMPLATE:THERMOSTAT)
Enter the name of a HVACTemplate:Thermostat object. If blank, then it is assumed that standard thermostat objects have been defined for this zone.

System Availability Schedule Name

Type: list of objects (SCHEDULE:COMPACT, SCHEDULE:YEAR, EXTERNALINTERFACE:FUNCTIONALMOCKUPUNITIMPORT:TO:SCHEDULE, SCHEDULE:CONSTANT, SCHEDULE:FILE or EXTERNALINTERFACE:SCHEDULE)
If blank, always on

Maximum Heating Supply Air Temperature

Unit: C
Default: 50

Minimum Cooling Supply Air Temperature

Unit: C
Default: 13

Maximum Heating Supply Air Humidity Ratio

Unit: kgWater/kgDryAir
Default: 0.0156

Minimum Cooling Supply Air Humidity Ratio

Unit: kgWater/kgDryAir
Default: 0.0077

Heating Limit

Type: choice (NoLimit, LimitFlowRate, LimitCapacity or LimitFlowRateAndCapacity)
Default: NoLimit

Maximum Heating Air Flow Rate

This field is ignored if Heating Limit = NoLimit If this field is blank, there is no limit.
Unit: m3/s
Minimum: 0.0

Maximum Sensible Heating Capacity

This field is ignored if Heating Limit = NoLimit If this field is blank, there is no limit.
Unit: W
Minimum: 0.0

Cooling Limit

Type: choice (NoLimit, LimitFlowRate, LimitCapacity or LimitFlowRateAndCapacity)
Default: NoLimit

Maximum Cooling Air Flow Rate

This field is ignored if Cooling Limit = NoLimit This field is required if Outdoor Air Economizer Type is anything other than NoEconomizer.
Unit: m3/s
Minimum: 0.0

Maximum Total Cooling Capacity

This field is ignored if Cooling Limit = NoLimit
Unit: W
Minimum: 0.0

Heating Availability Schedule Name

Type: list of objects (SCHEDULE:COMPACT, SCHEDULE:YEAR, EXTERNALINTERFACE:FUNCTIONALMOCKUPUNITIMPORT:TO:SCHEDULE, SCHEDULE:CONSTANT, SCHEDULE:FILE or EXTERNALINTERFACE:SCHEDULE)
If blank, heating is always available.

Cooling Availability Schedule Name

Type: list of objects (SCHEDULE:COMPACT, SCHEDULE:YEAR, EXTERNALINTERFACE:FUNCTIONALMOCKUPUNITIMPORT:TO:SCHEDULE, SCHEDULE:CONSTANT, SCHEDULE:FILE or EXTERNALINTERFACE:SCHEDULE)
If blank, cooling is always available.

Dehumidification Control Type

Type: choice (ConstantSensibleHeatRatio, Humidistat, None or ConstantSupplyHumidityRatio)
ConstantSensibleHeatRatio means that the ideal loads system will be controlled to meet the sensible cooling load, and the latent cooling rate will be computed using a constant sensible heat ratio (SHR) Humidistat means that there is a ZoneControl:Humidistat for this zone and the ideal loads system will attempt to satisfy the humidistat. None means that there is no dehumidification. ConstantSupplyHumidityRatio means that during cooling the supply air will always be at the Minimum Cooling Supply Humidity Ratio.
Default: ConstantSensibleHeatRatio

Cooling Sensible Heat Ratio

This field is applicable only when Dehumidification Control Type is ConstantSensibleHeatRatio
Unit: dimensionless
Maximum: 1.0
Default: 0.7

Dehumidification Setpoint

Type: real number
Zone relative humidity setpoint in percent (0 to 100)
Unit: percent
Minimum: 0.0
Maximum: 100.0
Default: 60.0

Humidification Control Type

Type: choice (None, Humidistat or ConstantSupplyHumidityRatio)
None means that there is no humidification. Humidistat means that there is a ZoneControl:Humidistat for this zone and the ideal loads system will attempt to satisfy the humidistat. ConstantSupplyHumidityRatio means that during heating the supply air will always be at the Maximum Heating Supply Humidity Ratio.
Default: None

Humidification Setpoint

Type: real number
Zone relative humidity setpoint in percent (0 to 100)
Unit: percent
Minimum: 0.0
Maximum: 100.0
Default: 30.0

Outdoor Air Method

Type: choice (None, Flow/Person, Flow/Zone, Flow/Area, Sum, Maximum or DetailedSpecification)
None means there is no outdoor air and all related fields will be ignored Flow/Person, Flow/Zone, Flow/Area, Sum, and Maximum use the values in the next three fields: Outdoor Air Flow Rate per Person, Outdoor Air Flow Rate per Zone Floor Area, and Outdoor Air Flow Rate per Zone. DetailedSpecification ignores these three Outdoor Air Flow Rate fields and instead references design specification objects named in the fields Design Specification Outdoor Air Object Name and Design Specification Zone Air Distribution Object Name.
Default: None

Outdoor Air Flow Rate per Person

Default 0.00944 is 20 cfm per person This input is used if the field Outdoor Air Method is Flow/Person, Sum, or Maximum
Unit: m3/s
Default: 0.00944

Outdoor Air Flow Rate per Zone Floor Area

This input is used if the field Outdoor Air Method is Flow/Area, Sum, or Maximum
Unit: m3/s-m2
Default: 0.0

Outdoor Air Flow Rate per Zone

Type: real number
This input is used if the field Outdoor Air Method is Flow/Zone, Sum, or Maximum
Unit: m3/s
Default: 0.0

Design Specification Outdoor Air Object Name

Type: list of objects ( or DESIGNSPECIFICATION:OUTDOORAIR)
When the name of a DesignSpecification:OutdoorAir object is entered, the minimum outdoor air flow rate will be computed using these specifications. The outdoor air flow rate will also be affected by the next two fields. If this field is blank, there will be no outdoor air and the remaining fields will be ignored.

Demand Controlled Ventilation Type

Type: choice (None, OccupancySchedule or CO2Setpoint)
This field controls how the minimum outdoor air flow rate is calculated. None means that design occupancy will be used to compute the minimum outdoor air flow rate OccupancySchedule means that current occupancy level will be used. CO2Setpoint means that the design occupancy will be used to compute the minimum outdoor air flow rate and the outdoor air flow rate may be increased if necessary to maintain the indoor air carbon dioxide setpoint defined in a ZoneControl:ContaminantController object.
Default: None

Outdoor Air Economizer Type

Type: choice (NoEconomizer, DifferentialDryBulb or DifferentialEnthalpy)
DifferentialDryBulb and DifferentialEnthalpy will increase the outdoor air flow rate when there is a cooling load and the outdoor air temperature or enthalpy is below the zone exhaust air temperature or enthalpy.
Default: NoEconomizer

Heat Recovery Type

Type: choice (None, Sensible or Enthalpy)
Default: None

Sensible Heat Recovery Effectiveness

Unit: dimensionless
Minimum: 0.0
Maximum: 1.0
Default: 0.70

Latent Heat Recovery Effectiveness

Applicable only if Heat Recovery Type is Enthalpy.
Unit: dimensionless
Minimum: 0.0
Maximum: 1.0
Default: 0.65