Objective/Method/Outcome
Objective: Determines if the zone air humidity is outside the set humidity for more than the acceptable time threshold.
Method: Checks if the zone humidity is outside the set value for more than 1.5 hours and determines an urgency score depending on the level of variation of humidity from the acceptable range and the amount of time it was outside of the range.
Outcome: Creates an insight and assigns an urgency score.
Applicable System
VAV, HP, FCU, UV, UH, RAD, RHT
Description
Ensure indoor humidity is within ASHRAE standard of comfort range.
This rule is part of the CopperTree Standard rule-set.
Default Priority
Low
Diagnosis
- Verify sensor location.
- Verify sensor has power.
- Verify reading in BMS.
- Replace if the sensor is broken.
Message
Zone humidity is outside the established comfort range.
Rule Template
Insight Type: Fault Detection
Trigger Type: Active High
Logic
Inputs
| Input | Unit | Tags | Description |
|---|---|---|---|
| Zone Humidity | % | Room Humidity | The recorded zone temperature |
| Threshold – Comfort Impact | % | Upper limit of the impact of this rule on Building Comfort | |
| Humidity Low Limit | % | Low Limit of humidity | |
| Threshold – Max Humidity Out of Range | % | Maximum humidity out of range that can be used for calculating score | |
| Threshold – Urgency Score | % | Maximum urgency score for rule | |
| Occupancy | Room Occupied, Discharge Air Fan Status, Discharge Air Fan Command | Building occupancy | |
| Humidity Min Limit | % | Minimum humidity out of range that is can be used for calculating score | |
| Humidity High Limit | % | High limit of humidity range | |
| Humidity Max Limit | % | Maximum humidity that is used for calculating score |
Notes
Default Thresholds:
- Humidity Low Limit: 30%
- Humidity Min Limit: 5%
- Humidity High Limit: 60%
- Humidity Max Limit: 90%
- Comfort Impact Insight Threshold: 30%
- Urgency Score Insight Threshold: 30%
- Urgency Score Maximum Threshold: 10%
