# ZONEVENTILATION:DESIGNFLOWRATE

Ventilation is specified as a design level which is modified by a schedule fraction, temperature difference and wind speed: Ventilation=Vdesign * Fschedule * (A + B*|(Tzone-Todb)| + C*WindSpd + D * WindSpd**2) If you use a ZoneList in the Zone or ZoneList name field then this definition applies to all the zones in the ZoneList.

##### Name

Type: alphanumeric

##### Zone or ZoneList Name

Type: list of objects
(

ZONELIST or

ZONE)

##### Schedule Name

Type: list of objects
(

EXTERNALINTERFACE:SCHEDULE,

SCHEDULE:CONSTANT,

SCHEDULE:YEAR,

SCHEDULE:COMPACT,

SCHEDULE:FILE or

EXTERNALINTERFACE:FUNCTIONALMOCKUPUNITIMPORT:TO:SCHEDULE)

##### Design Flow Rate Calculation Method

Type: choice
(Flow/Zone, Flow/Area, Flow/Person or AirChanges/Hour)

The entered calculation method is used to create the maximum amount of ventilation for this set of attributes Choices: Flow/Zone => Design Flow Rate -- simply enter Design Flow Rate Flow/Area => Flow Rate per Zone Floor Area - Value * Floor Area (zone) = Design Flow Rate Flow/Person => Flow Rate per Person - Value * #people = Design Flow Rate AirChanges/Hour => Air Changes per Hour - Value * Floor Volume (zone) adjusted for m3/s = Design Volume Flow Rate "Vdesign" in Equation is the result.

Default: Flow/Zone

##### Design Flow Rate

Type: real number

Unit: m3/s

Minimum: 0

##### Flow Rate per Zone Floor Area

Type: real number

Unit: m3/s-m2

Minimum: 0

##### Flow Rate per Person

Type: real number

Unit: m3/s-person

Minimum: 0

##### Air Changes per Hour

Type: real number

Unit: 1/hr

Minimum: 0

##### Ventilation Type

Type: choice
(Natural, Intake, Exhaust or Balanced)

Default: Natural

##### Fan Pressure Rise

Type: real number

Pressure rise across the fan

Unit: Pa

Minimum: 0

Default: 0

##### Fan Total Efficiency

Type: real number

Default: 1

##### Constant Term Coefficient

Type: real number

"A" in Equation

Default: 1

##### Temperature Term Coefficient

Type: real number

"B" in Equation

Default: 0

##### Velocity Term Coefficient

Type: real number

"C" in Equation

Default: 0

##### Velocity Squared Term Coefficient

Type: real number

"D" in Equation

Default: 0

##### Minimum Indoor Temperature

Type: real number

This is the indoor temperature below which ventilation is shutoff

Unit: C

Minimum: -100

Maximum: 100

Default: -100

##### Minimum Indoor Temperature Schedule Name

Type: list of objects
(

EXTERNALINTERFACE:SCHEDULE,

SCHEDULE:CONSTANT,

SCHEDULE:YEAR,

SCHEDULE:COMPACT,

SCHEDULE:FILE or

EXTERNALINTERFACE:FUNCTIONALMOCKUPUNITIMPORT:TO:SCHEDULE)

This schedule contains the indoor temperature versus time below which ventilation is shutoff.

##### Maximum Indoor Temperature

Type: real number

This is the indoor temperature above which ventilation is shutoff

Unit: C

Minimum: -100

Maximum: 100

Default: 100

##### Maximum Indoor Temperature Schedule Name

Type: list of objects
(

EXTERNALINTERFACE:SCHEDULE,

SCHEDULE:CONSTANT,

SCHEDULE:YEAR,

SCHEDULE:COMPACT,

SCHEDULE:FILE or

EXTERNALINTERFACE:FUNCTIONALMOCKUPUNITIMPORT:TO:SCHEDULE)

This schedule contains the indoor temperature versus time above which ventilation is shutoff.

##### Delta Temperature

Type: real number

This is the temperature differential between indoor and outdoor below which ventilation is shutoff. If ((IndoorTemp - OutdoorTemp) < DeltaTemperature) then ventilation is not allowed. For example, if delta temperature is 2C, ventilation is assumed to be available if the outside air temperature is at least 2C cooler than the zone air temperature. The values for this field can include negative numbers. This allows ventilation to occur even if the outdoor temperature is above the indoor temperature.

Unit: deltaC

Minimum: -100

Default: -100

##### Delta Temperature Schedule Name

Type: list of objects
(

EXTERNALINTERFACE:SCHEDULE,

SCHEDULE:CONSTANT,

SCHEDULE:YEAR,

SCHEDULE:COMPACT,

SCHEDULE:FILE or

EXTERNALINTERFACE:FUNCTIONALMOCKUPUNITIMPORT:TO:SCHEDULE)

This schedule contains the temperature differential between indoor and outdoor versus time below which ventilation is shutoff.

##### Minimum Outdoor Temperature

Type: real number

This is the outdoor temperature below which ventilation is shutoff

Unit: C

Minimum: -100

Maximum: 100

Default: -100

##### Minimum Outdoor Temperature Schedule Name

Type: list of objects
(

EXTERNALINTERFACE:SCHEDULE,

SCHEDULE:CONSTANT,

SCHEDULE:YEAR,

SCHEDULE:COMPACT,

SCHEDULE:FILE or

EXTERNALINTERFACE:FUNCTIONALMOCKUPUNITIMPORT:TO:SCHEDULE)

This schedule contains the outdoor temperature versus time below which ventilation is shutoff.

##### Maximum Outdoor Temperature

Type: real number

This is the outdoor temperature above which ventilation is shutoff

Unit: C

Minimum: -100

Maximum: 100

Default: 100

##### Maximum Outdoor Temperature Schedule Name

Type: list of objects
(

EXTERNALINTERFACE:SCHEDULE,

SCHEDULE:CONSTANT,

SCHEDULE:YEAR,

SCHEDULE:COMPACT,

SCHEDULE:FILE or

EXTERNALINTERFACE:FUNCTIONALMOCKUPUNITIMPORT:TO:SCHEDULE)

This schedule contains the outdoor temperature versus time above which ventilation is shutoff.

##### Maximum Wind Speed

Type: real number

This is the outdoor wind speed above which ventilation is shutoff

Unit: m/s

Minimum: 0

Maximum: 40

Default: 40