---
title: HMCharacteristicTypeDehumidifierThreshold
framework: homekit
role: symbol
role_heading: Global Variable
path: homekit/hmcharacteristictypedehumidifierthreshold
---

# HMCharacteristicTypeDehumidifierThreshold

The humidity above which a dehumidifier should begin to work.

## Declaration

```swift
let HMCharacteristicTypeDehumidifierThreshold: String
```

## Discussion

Discussion The corresponding value is a floating point percentage representing the relative humidity threshold. Relative humidity is a measure of the amount of water in the air relative to the maximum it can hold at the current temperature.

## See Also

### Humidity

- [HMCharacteristicTypeCurrentRelativeHumidity](homekit/hmcharacteristictypecurrentrelativehumidity.md)
- [HMCharacteristicTypeTargetRelativeHumidity](homekit/hmcharacteristictypetargetrelativehumidity.md)
- [HMCharacteristicTypeCurrentHumidifierDehumidifierState](homekit/hmcharacteristictypecurrenthumidifierdehumidifierstate.md)
- [HMCharacteristicTypeTargetHumidifierDehumidifierState](homekit/hmcharacteristictypetargethumidifierdehumidifierstate.md)
- [HMCharacteristicTypeHumidifierThreshold](homekit/hmcharacteristictypehumidifierthreshold.md)