Set fan speed

The Set fan speed action is useful when you know the exact speed you want. Use it to move a fan to a specific level, like 25% for quiet airflow or 100% for fast cooling.

Using this action from the user interface

If you prefer building automations and scripts visually, Home Assistant walks you through this action step by step. You pick what to target, tweak a few options, and save. No YAML knowledge required.

To use this action in an automation or script:

1. Go to Settings > Automations & scenes.
2. Open an existing automation or script, or select Create automation > Create new automation.
3. If you’re creating an automation, add a trigger in the When section.
4. In the Then do section, select Add action.
5. Select what you want to control. Under By target (see Targets), pick the fan you want to control. You can also select an area, a floor, a device, or a label.
6. From the actions shown for that target, select Set fan speed.
7. Under Percentage, set the speed you want.
8. Select Save.

Options in the UI

Using this action in YAML

If you work directly in YAML, or you want to know exactly what Home Assistant does under the hood, this section has the technical reference. It lists the field names you use in YAML, their types, and which ones are required.

In YAML, refer to this action as fan.set_percentage. A basic example looks like this:

action: fan.set_percentage
target:
  entity_id: fan.office
data:
  percentage: 40

This sets fan.office to 40% speed.

Options in YAML

Targets of the action

This action requires a target. The target is the object of the action. You can point the action at a single entityAn entity represents a sensor, actor, or function in Home Assistant. Entities are used to monitor physical properties or to control other entities. An entity is usually part of a device or a service. [Learn more], a device, an area, a floor, or a label, and Home Assistant will run the action on every matching fan entity behind that target.

• Entity: one specific fan entity, such as fan.living_room.
• Device: every fan entity that belongs to a device.
• Area: every fan entity in a room or area.
• Floor: every fan entity on a floor.
• Label: every fan entity that shares a label.

You can also select different target types in one action. For example, you can add a specific entity and an area as targets in the same action to run the action on both of them at once.

Good to know

• This action is available only for fans that support speed control.
• 0 is allowed by the selector, but some devices may treat that as off or ignore it.
• To move the speed up or down by a step instead, use Increase fan speed or Decrease fan speed.

Try it yourself

Ready to test this? Open Developer tools > Actions, search for this action, fill in the fields, and select Perform action. You see what happens on your actual entitiesAn entity represents a sensor, actor, or function in Home Assistant. Entities are used to monitor physical properties or to control other entities. An entity is usually part of a device or a service. [Learn more] without writing a line of YAML.

More examples

Real scenarios where this action shows up in automations and scripts. Copy any example and adapt it to your setup.

Automation: set the office fan to a quiet speed in the morning

Start the day with a light airflow that is less distracting during calls.

• Trigger: Time: 08:00
• Action: Set fan speed
• Target: Office fan
• Percentage: 35

alias: "Office fan to 35 percent"
triggers:
  - trigger: time
    at: "08:00:00"
actions:
  - action: fan.set_percentage
    target:
      entity_id: fan.office
    data:
      percentage: 35

Automation: raise the living room fan to full speed when the sun comes in

When the afternoon sun starts heating the room, you can push the fan to full speed for faster cooling.

• Trigger: Time: 15:00
• Action: Set fan speed
• Target: Living room fan
• Percentage: 100

alias: "Living room fan to full speed"
triggers:
  - trigger: time
    at: "15:00:00"
actions:
  - action: fan.set_percentage
    target:
      entity_id: fan.living_room
    data:
      percentage: 100

Still stuck?

The Home Assistant community is quick to help: join Discord for real-time chat, post on the community forum with the action you’re calling and what you expected to happen, or share on our subreddit /r/homeassistant.

Related actions

These actions work well alongside this one:

• Increase fan speed: Increase the speed of a fan.

• Decrease fan speed: Decrease the speed of a fan.