The baseline building does not have night purge controls. If the software supports it and the proposed design has the features, the following keywords may be used to model night purge. Note that night purge is coupled with thermal mass in the building, which is specified by other building descriptors.
|
Night Purge Availability Schedule |
|
|---|---|
|
Applicability |
Systems that operate the fans for nighttime purge of heat gains |
|
Definition |
A schedule which represents the availability of night purge controls. |
|
Units |
Data structure: schedule, on/off |
|
Input Restrictions |
As designed. The default is no night purge control. |
|
Baseline Rules |
Not applicable |
|
Night Purge Control |
|
|---|---|
|
Applicability |
Systems that operate the fans for nighttime purge of heat gains |
|
Definition |
The control strategy for operation of nighttime purge. The control strategy may take account of indoor temperature, season, indoor temperature and other factors. |
|
Units |
Data structure |
|
Input Restrictions |
As designed |
|
Baseline Rules |
Not applicable |
|
Night Purge Fan Ratio |
|
|---|---|
|
Applicability |
Systems that operate the fans for nighttime purge of heat gains |
|
Definition |
The ratio of fan speed for a night purge cycle. |
|
Units |
Ratio |
|
Input Restrictions |
As designed. The default is 100% (or fans available at full speed). |
|
Baseline Rules |
Not applicable |
The baseline building does not have night purge controls. If the software supports it and the proposed design has the features, the following keywords may be used to model night purge. Note that night purge is coupled with thermal mass in the building, which is specified by other building descriptors.
|
Night Purge Availability Schedule |
|
|---|---|
|
Applicability |
Systems that operate the fans for nighttime purge of heat gains |
|
Definition |
A schedule that represents the availability of night purge controls |
|
Units |
Data structure: schedule, on/off |
|
Input Restrictions |
As designed. The default is no night purge control. |
|
Baseline Building |
Not applicable |
|
Night Purge Control |
|
|---|---|
|
Applicability |
Systems that operate the fans for nighttime purge of heat gains |
|
Definition |
The control strategy for operation of nighttime purge. The control strategy may account for indoor temperature, season, and other factors. |
|
Units |
Data structure |
|
Input Restrictions |
As designed |
|
Baseline Building |
Not applicable |
|
Night Purge Fan Ratio |
|
|---|---|
|
Applicability |
Systems that operate the fans for nighttime purge of heat gains |
|
Definition |
The ratio of fan speed for a night purge cycle |
|
Units |
Fraction (0 to 1) |
|
Input Restrictions |
As designed. The default is 100% (or fans available at full speed). |
|
Baseline Building |
Not applicable |
G3.2 New Construction/Major Alterations
The baseline building does not have night purge controls. If the software supports it and the proposed design has the features, the following keywords may be used to model night purge. Note that night purge is coupled with thermal mass in the building, which is specified by other building descriptors.
G3.3 Minor Alterations
Standard 90.1 Section G3.3.2.2 Schedules allows schedules to differ across the baseline and proposed models following 90.1 Table G3.1(4), Baseline Building Performance column, Exceptions 1 through 3. Based on this allowance the baseline can be modeled without night purge when it is specified in the proposed design with authority having jurisdiction approval.
|
Night Purge Availability Schedule |
|
|---|---|
|
Applicability |
Systems that operate the fans for nighttime purge of heat gains |
|
Definition |
A schedule that represents the availability of night purge controls |
|
Units |
Data structure: schedule, on/off |
|
Input Restrictions |
As designed. The default is no night purge control. |
|
Baseline Building |
G3.2 New Construction/Major Alterations Not applicable. G3.3 Minor Alterations Same as proposed except if modeling credit for night purge based on 90.1 Table G3.1(4), Baseline Building Performance column, Exceptions 1 through 3. |
|
Night Purge Control |
|
|---|---|
|
Applicability |
Systems that operate the fans for nighttime purge of heat gains |
|
Definition |
The control strategy for operation of nighttime purge. The control strategy may account for indoor temperature, season, and other factors. |
|
Units |
Data structure |
|
Input Restrictions |
As designed |
|
Baseline Building |
G3.2 New Construction/Major Alterations Not applicable. G3.3 Minor Alterations Same as proposed except if modeling credit for night purge based on 90.1 Table G3.1(4), Baseline Building Performance column, Exceptions 1 through 3. |
|
Night Purge Fan Ratio |
|
|---|---|
|
Applicability |
Systems that operate the fans for nighttime purge of heat gains |
|
Definition |
The ratio of fan speed for a night purge cycle |
|
Units |
Fraction (0 to 1) |
|
Input Restrictions |
As designed. The default is 100% (or fans available at full speed). |
|
Baseline Building |
G3.2 New Construction/Major Alterations Not applicable. G3.3 Minor Alterations Same as proposed except if modeling credit for night purge based on 90.1 Table G3.1(4), Baseline Building Performance column, Exceptions 1 through 3. |