Automatic Fan 3 Speeds Set Control based on Temperature

This blueprint is based on the work of Sam04.
I needed to add the speed level (percentage) for a mid temperature and a max temperature.
I have clearly declared the use of the fan service instead of the homeassistant service to turn/turn off on or control the speed.
Besides the Inside temperature threshold at level 1 of your fan (33%), there are a Mid-Temperature for the level 2 of your fan (66%) and a Max-Temperature for the level 3 of your fan (100%)

This was done for my personnal use and I might enhanced it.

Open your Home Assistant instance and show the blueprint import dialog with a specific blueprint pre-filled.

blueprint:
  name: Automatic Fan 3 Speeds Set Control based on Temperature
  description:
    "## Fan ON/OFF and set speed (3-speeds) Automation based on temperature,\
    \ outside temperature.\n\nFan turns on if the following conditions are met:\n\
    \  temperature inside greater than your set threshold value\n  temperature outside\
    \ is lower than your set maximum value (to prevent turning the fan on in winter)\n\
    \nAnd the Fan turns off if the following conditions are met:\n  temperature inside is\
    \ lower than your threshold value minus the hystersis value\n  What the automation\
    \ **NOT** observes:\n  manual fan control. Adapt the given values too your needs.\n\
    \  If you manually turn the fan on and the inside temperature is below the threshold\
    \ your fan will turn off soon.\n\nWhat you need:\n  a fan entity. if you control\
    \ your fan via a switch entity (via smart plug for example) you can create a template\
    \ fan entity.\n  sensor entities for inside and outside temperature. (if you want\
    \ to use the weather domain than create a template sensor from the temp attribute)\n\
    \  Inspired by b-0s based on the work of Sam04"
  domain: automation
  input:
    fan:
      name: Fan
      description: Fan to control
      selector:
        target:
          entity:
            domain: fan
    temp_inside:
      name: Temperature Inside
      description: Temperature to track inside your house
      selector:
        entity:
          domain: sensor
          device_class: temperature
          multiple: false
    temp_outside:
      name: Temperature Outside
      description:
        Temperature outside to prevent to turn on the fan in winter for
        example. Set to same Temperature Inside entity if you don't want to use it
      selector:
        entity:
          domain: sensor
          device_class: temperature
          multiple: false
    temp_outside_min:
      name: Outside temperature
      description:
        outside temperature that must be reached to turn on the fan (to
        prevent the fan to be turned on in winter). Set to 0 to disable
      selector:
        number:
          min: 0.0
          max: 300.0
          step: 0.5
          unit_of_measurement: °C | °F
          mode: slider
    temp_threshold_inside:
      name: Inside temperature threshold
      description:
        inside threshold temperature that must be reached to turn on the
        fan
      selector:
        number:
          min: 0.0
          max: 300.0
          step: 0.5
          unit_of_measurement: °C | °F
          mode: slider
    hysteresis:
      name: Hysteresis
      description:
        The difference the observed value must be lower than the threshold
        value before the fan is turned off
      selector:
        number:
          min: 0.5
          max: 100.0
          step: 0.5
          unit_of_measurement: °C | °F
          mode: slider
    mid_temp:
      name: Mid-Temperature
      description:
        The temperature that must be reached to turn the level 2 speed
        of the fan
      selector:
        number:
          min: 0.0
          max: 100.0
          step: 0.5
          unit_of_measurement: °C | °F
          mode: slider
    max_temp:
      name: Max-Temperature
      description:
        The temperature that must be reached to turn the level 3 speed
        of the fan
      selector:
        number:
          min: 0.0
          max: 100.0
          step: 0.5
          unit_of_measurement: °C | °F
          mode: slider
  source_url: https://community.home-assistant.io/t/automatic-fan-3-speeds-set-control-based-on-temperature/421719
variables:
  fan: !input "fan"
  temp_inside_entity: !input "temp_inside"
  temp_inside: "{{ states[temp_inside_entity].state }}"
  temp_outside_entity: !input "temp_outside"
  temp_outside: "{{ states[temp_outside_entity].state }}"
  temp_threshold_inside: !input "temp_threshold_inside"
  temp_outside_min: !input "temp_outside_min"
  hysteresis: !input "hysteresis"
  mid_temp: !input "mid_temp"
  max_temp: !input "max_temp"
max_exceeded: silent
trigger:
  - platform: state
    entity_id: !input "temp_inside"
  - platform: state
    entity_id: !input "temp_outside"
condition: []
action:
  - choose:
      - conditions:
          - alias: temp inside greater than temp threshold value
            condition: template
            value_template: "{{ temp_inside|float > temp_threshold_inside|float }}"
          - alias: temp outside greater than outside min temp
            condition: template
            value_template: "{{ temp_outside|float > temp_outside_min|float }}"
        sequence:
          - choose:
              - conditions:
                  - "{{ temp_inside|float >= 33 }}"
                sequence:
                  - choose:
                      - conditions:
                          - "{{ temp_inside|float >= max_temp|float }}"
                        sequence:
                          - service: fan.set_percentage
                            data:
                              percentage: 100
                            target: !input "fan"
                      - conditions:
                          - "{{ mid_temp <= temp_inside|float > max_temp|float }}"
                        sequence:
                          - service: fan.set_percentage
                            data:
                              percentage: 66.66
                            target: !input "fan"
                      - conditions:
                          - "{{ temp_threshold_inside|float <= temp_inside|float > mid_temp|float }}"
                        sequence:
                          - service: fan.set_percentage
                            data:
                              percentage: 33.33
                            target: !input "fan"
                    default: []
              - conditions:
                  - '{{ states[fan].state == "off" }}'
                sequence:
                  - service: homeassistant.turn_on
                    target: !input "fan"
            default: []
      - conditions:
          - condition: or
            conditions:
              - condition: template
                value_template: "{{ (temp_threshold_inside - hysteresis)|float > temp_inside|float }}"
        sequence:
          - service: homeassistant.turn_off
            target: !input "fan"
    default: []
mode: single