<br />

## Description

Set the relative speed for the fan.

## Fields

| Key | Type | Description |
|---|---|---|
| `devices` | \[[Device](https://developers.home.google.com/automations/schema/basics.md.txt#entity)\] | Devices that support setting the speed of a fan. Required |
| `fanSpeedRelativePercent` | [Number](https://developers.home.google.com/automations/schema/basics.md.txt#number) | This value represents the percentage of speed to change. Optional <br /> To use this field, all the following fields CANNOT be used: *fanSpeedRelativeWeight* <br /> |
| `fanSpeedRelativeWeight` | [Number](https://developers.home.google.com/automations/schema/basics.md.txt#number) | This value indicates the relative amount of the speed change. The absolute value indicates the scaled amount while the numerical sign indicates the direction of the change. Optional <br /> To use this field, all the following fields CANNOT be used: *fanSpeedRelativePercent* <br /> |

## Examples

```yaml
actions:
- type: device.command.SetFanSpeedRelative
  fanSpeedRelativePercent: -10
  devices: My Device - Room Name
```