AIRFLOWNETWORK:MULTIZONE:ZONE

This object is used to simultaneously control a thermal zone's window and door openings, both exterior and interior.

Zone Name

Type: list of objects ( or ZONE)
Enter the zone name where ventilation control is required.

Ventilation Control Mode

Type: choice (Temperature, Enthalpy, Constant, ASHRAE55Adaptive, CEN15251Adaptive or NoVent)
When Ventilation Control Mode = Temperature or Enthalpy, the following fields are used to modulate the Ventilation Open Factor for all window and door openings in the zone according to the zone's indoor-outdoor temperature or enthalpy difference. Constant: controlled by field Venting Schedule Name. NoVent: control will not open window or door during simulation (Ventilation Open Factor = 0).
Default: NoVent

Ventilation Control Zone Temperature Setpoint Schedule Name

Type: list of objects (SCHEDULE:CONSTANT, SCHEDULE:FILE, SCHEDULE:YEAR, SCHEDULE:COMPACT, EXTERNALINTERFACE:SCHEDULE or EXTERNALINTERFACE:FUNCTIONALMOCKUPUNITIMPORT:TO:SCHEDULE)
Used only if Ventilation Control Mode = Temperature or Enthalpy.

Minimum Venting Open Factor

Type: real number
Used only if Ventilation Control Mode = Temperature or Enthalpy.
Unit: dimensionless
Minimum: 0.0
Maximum: 1.0
Default: 0.0

Indoor and Outdoor Temperature Difference Lower Limit For Maximum Venting Open Factor

Type: real number
Applicable only if Ventilation Control Mode = Temperature. This value must be less than the corresponding upper value (next field).
Unit: deltaC
Minimum: 0.0
Default: 0.0

Indoor and Outdoor Temperature Difference Upper Limit for Minimum Venting Open Factor

Type: real number
Applicable only if Ventilation Control Mode = Temperature. This value must be greater than the corresponding lower value (previous field).
Unit: deltaC
Default: 100.0

Indoor and Outdoor Enthalpy Difference Lower Limit For Maximum Venting Open Factor

Type: real number
Applicable only if Ventilation Control Mode = Enthalpy. This value must be less than the corresponding upper value (next field).
Unit: deltaJ/kg
Minimum: 0.0
Default: 0.0

Indoor and Outdoor Enthalpy Difference Upper Limit for Minimum Venting Open Factor

Type: real number
Applicable only if Ventilation Control Mode = Enthalpy. This value must be greater than the corresponding lower value (previous field).
Unit: deltaJ/kg
Default: 300000.0

Venting Availability Schedule Name

Type: list of objects (SCHEDULE:CONSTANT, SCHEDULE:FILE, SCHEDULE:YEAR, SCHEDULE:COMPACT, EXTERNALINTERFACE:SCHEDULE or EXTERNALINTERFACE:FUNCTIONALMOCKUPUNITIMPORT:TO:SCHEDULE)
Non-zero Schedule value means venting is allowed if other venting control conditions are satisfied. A zero (or negative) Schedule value means venting is not allowed under any The Schedule values should be greater than or equal to 0 and less than or equal to 1. circumstances. If this Schedule is not specified then venting is allowed if other venting control conditions are satisfied. Not used if Ventilation Control Mode = NoVent.

Single Sided Wind Pressure Coefficient Algorithm

Type: choice (Advanced or Standard)
Selecting Advanced results in EnergyPlus calculating modified Wind Pressure Coefficients to account for wind direction and turbulence effects on single sided ventilation rates. Model is only valid for zones with 2 openings, both of which are on a single facade.
Default: Standard

Facade Width

Type: real number
This is the whole building width along the direction of the facade of this zone.
Unit: m
Minimum: 0.0
Default: 10.0

Occupant Ventilation Control Name

Type: list of objects ( or AIRFLOWNETWORK:OCCUPANTVENTILATIONCONTROL)
Enter the name where Occupancy Ventilation Control is required.