diff --git a/homeassistant/components/deconz/fan.py b/homeassistant/components/deconz/fan.py
index 1ca4c8ff9c2..3d2e61fdd7b 100644
--- a/homeassistant/components/deconz/fan.py
+++ b/homeassistant/components/deconz/fan.py
@@ -1,4 +1,7 @@
-"""Support for deCONZ switches."""
+"""Support for deCONZ fans."""
+
+from typing import Optional
+
 from homeassistant.components.fan import (
     DOMAIN,
     SPEED_HIGH,
@@ -10,25 +13,19 @@ from homeassistant.components.fan import (
 )
 from homeassistant.core import callback
 from homeassistant.helpers.dispatcher import async_dispatcher_connect
+from homeassistant.util.percentage import (
+    ordered_list_item_to_percentage,
+    percentage_to_ordered_list_item,
+)
 
 from .const import FANS, NEW_LIGHT
 from .deconz_device import DeconzDevice
 from .gateway import get_gateway_from_config_entry
 
-SPEEDS = {SPEED_OFF: 0, SPEED_LOW: 1, SPEED_MEDIUM: 2, SPEED_HIGH: 4}
-SUPPORTED_ON_SPEEDS = {1: SPEED_LOW, 2: SPEED_MEDIUM, 4: SPEED_HIGH}
+ORDERED_NAMED_FAN_SPEEDS = [1, 2, 3, 4]
 
-
-def convert_speed(speed: int) -> str:
-    """Convert speed from deCONZ to HASS.
-
-    Fallback to medium speed if unsupported by HASS fan platform.
-    """
-    if speed in SPEEDS.values():
-        for hass_speed, deconz_speed in SPEEDS.items():
-            if speed == deconz_speed:
-                return hass_speed
-    return SPEED_MEDIUM
+LEGACY_SPEED_TO_DECONZ = {SPEED_OFF: 0, SPEED_LOW: 1, SPEED_MEDIUM: 2, SPEED_HIGH: 4}
+LEGACY_DECONZ_TO_SPEED = {0: SPEED_OFF, 1: SPEED_LOW, 2: SPEED_MEDIUM, 4: SPEED_HIGH}
 
 
 async def async_setup_entry(hass, config_entry, async_add_entities) -> None:
@@ -67,8 +64,8 @@ class DeconzFan(DeconzDevice, FanEntity):
         """Set up fan."""
         super().__init__(device, gateway)
 
-        self._default_on_speed = SPEEDS[SPEED_MEDIUM]
-        if self.speed != SPEED_OFF:
+        self._default_on_speed = 2
+        if self._device.speed in ORDERED_NAMED_FAN_SPEEDS:
             self._default_on_speed = self._device.speed
 
         self._features = SUPPORT_SET_SPEED
@@ -76,17 +73,58 @@ class DeconzFan(DeconzDevice, FanEntity):
     @property
     def is_on(self) -> bool:
         """Return true if fan is on."""
-        return self.speed != SPEED_OFF
+        return self._device.speed != 0
 
     @property
-    def speed(self) -> int:
-        """Return the current speed."""
-        return convert_speed(self._device.speed)
+    def percentage(self) -> Optional[int]:
+        """Return the current speed percentage."""
+        if self._device.speed == 0:
+            return 0
+        if self._device.speed not in ORDERED_NAMED_FAN_SPEEDS:
+            return
+        return ordered_list_item_to_percentage(
+            ORDERED_NAMED_FAN_SPEEDS, self._device.speed
+        )
+
+    @property
+    def speed_count(self) -> int:
+        """Return the number of speeds the fan supports."""
+        return len(ORDERED_NAMED_FAN_SPEEDS)
 
     @property
     def speed_list(self) -> list:
-        """Get the list of available speeds."""
-        return list(SPEEDS)
+        """Get the list of available speeds.
+
+        Legacy fan support.
+        """
+        return list(LEGACY_SPEED_TO_DECONZ)
+
+    def speed_to_percentage(self, speed: str) -> int:
+        """Convert speed to percentage.
+
+        Legacy fan support.
+        """
+        if speed == SPEED_OFF:
+            return 0
+
+        if speed not in LEGACY_SPEED_TO_DECONZ:
+            speed = SPEED_MEDIUM
+
+        return ordered_list_item_to_percentage(
+            ORDERED_NAMED_FAN_SPEEDS, LEGACY_SPEED_TO_DECONZ[speed]
+        )
+
+    def percentage_to_speed(self, percentage: int) -> str:
+        """Convert percentage to speed.
+
+        Legacy fan support.
+        """
+        if percentage == 0:
+            return SPEED_OFF
+        return LEGACY_DECONZ_TO_SPEED.get(
+            percentage_to_ordered_list_item(ORDERED_NAMED_FAN_SPEEDS, percentage),
+            SPEED_MEDIUM,
+        )
 
     @property
     def supported_features(self) -> int:
@@ -96,24 +134,26 @@ class DeconzFan(DeconzDevice, FanEntity):
     @callback
     def async_update_callback(self, force_update=False) -> None:
         """Store latest configured speed from the device."""
-        if self.speed != SPEED_OFF and self._device.speed != self._default_on_speed:
+        if self._device.speed in ORDERED_NAMED_FAN_SPEEDS:
             self._default_on_speed = self._device.speed
         super().async_update_callback(force_update)
 
+    async def async_set_percentage(self, percentage: int) -> None:
+        """Set the speed percentage of the fan."""
+        await self._device.set_speed(
+            percentage_to_ordered_list_item(ORDERED_NAMED_FAN_SPEEDS, percentage)
+        )
+
     async def async_set_speed(self, speed: str) -> None:
-        """Set the speed of the fan."""
-        if speed not in SPEEDS:
+        """Set the speed of the fan.
+
+        Legacy fan support.
+        """
+        if speed not in LEGACY_SPEED_TO_DECONZ:
             raise ValueError(f"Unsupported speed {speed}")
 
-        await self._device.set_speed(SPEEDS[speed])
+        await self._device.set_speed(LEGACY_SPEED_TO_DECONZ[speed])
 
-    #
-    # The fan entity model has changed to use percentages and preset_modes
-    # instead of speeds.
-    #
-    # Please review
-    # https://developers.home-assistant.io/docs/core/entity/fan/
-    #
     async def async_turn_on(
         self,
         speed: str = None,
@@ -122,10 +162,15 @@ class DeconzFan(DeconzDevice, FanEntity):
         **kwargs,
     ) -> None:
         """Turn on fan."""
-        if not speed:
-            speed = convert_speed(self._default_on_speed)
-        await self.async_set_speed(speed)
+        new_speed = self._default_on_speed
+
+        if percentage is not None:
+            new_speed = percentage_to_ordered_list_item(
+                ORDERED_NAMED_FAN_SPEEDS, percentage
+            )
+
+        await self._device.set_speed(new_speed)
 
     async def async_turn_off(self, **kwargs) -> None:
         """Turn off fan."""
-        await self.async_set_speed(SPEED_OFF)
+        await self._device.set_speed(0)
diff --git a/tests/components/deconz/test_fan.py b/tests/components/deconz/test_fan.py
index 930645689f8..ddd4a4e46f4 100644
--- a/tests/components/deconz/test_fan.py
+++ b/tests/components/deconz/test_fan.py
@@ -5,8 +5,10 @@ from unittest.mock import patch
 import pytest
 
 from homeassistant.components.fan import (
+    ATTR_PERCENTAGE,
     ATTR_SPEED,
     DOMAIN as FAN_DOMAIN,
+    SERVICE_SET_PERCENTAGE,
     SERVICE_SET_SPEED,
     SERVICE_TURN_OFF,
     SERVICE_TURN_ON,
@@ -59,10 +61,62 @@ async def test_fans(hass, aioclient_mock, mock_deconz_websocket):
 
     assert len(hass.states.async_all()) == 2  # Light and fan
     assert hass.states.get("fan.ceiling_fan").state == STATE_ON
-    assert hass.states.get("fan.ceiling_fan").attributes[ATTR_SPEED] == SPEED_HIGH
+    assert hass.states.get("fan.ceiling_fan").attributes[ATTR_PERCENTAGE] == 100
 
     # Test states
 
+    event_changed_light = {
+        "t": "event",
+        "e": "changed",
+        "r": "lights",
+        "id": "1",
+        "state": {"speed": 1},
+    }
+    await mock_deconz_websocket(data=event_changed_light)
+    await hass.async_block_till_done()
+
+    assert hass.states.get("fan.ceiling_fan").state == STATE_ON
+    assert hass.states.get("fan.ceiling_fan").attributes[ATTR_PERCENTAGE] == 25
+
+    event_changed_light = {
+        "t": "event",
+        "e": "changed",
+        "r": "lights",
+        "id": "1",
+        "state": {"speed": 2},
+    }
+    await mock_deconz_websocket(data=event_changed_light)
+    await hass.async_block_till_done()
+
+    assert hass.states.get("fan.ceiling_fan").state == STATE_ON
+    assert hass.states.get("fan.ceiling_fan").attributes[ATTR_PERCENTAGE] == 50
+
+    event_changed_light = {
+        "t": "event",
+        "e": "changed",
+        "r": "lights",
+        "id": "1",
+        "state": {"speed": 3},
+    }
+    await mock_deconz_websocket(data=event_changed_light)
+    await hass.async_block_till_done()
+
+    assert hass.states.get("fan.ceiling_fan").state == STATE_ON
+    assert hass.states.get("fan.ceiling_fan").attributes[ATTR_PERCENTAGE] == 75
+
+    event_changed_light = {
+        "t": "event",
+        "e": "changed",
+        "r": "lights",
+        "id": "1",
+        "state": {"speed": 4},
+    }
+    await mock_deconz_websocket(data=event_changed_light)
+    await hass.async_block_till_done()
+
+    assert hass.states.get("fan.ceiling_fan").state == STATE_ON
+    assert hass.states.get("fan.ceiling_fan").attributes[ATTR_PERCENTAGE] == 100
+
     event_changed_light = {
         "t": "event",
         "e": "changed",
@@ -74,13 +128,13 @@ async def test_fans(hass, aioclient_mock, mock_deconz_websocket):
     await hass.async_block_till_done()
 
     assert hass.states.get("fan.ceiling_fan").state == STATE_OFF
-    assert hass.states.get("fan.ceiling_fan").attributes[ATTR_SPEED] == SPEED_OFF
+    assert hass.states.get("fan.ceiling_fan").attributes[ATTR_PERCENTAGE] == 0
 
     # Test service calls
 
     mock_deconz_put_request(aioclient_mock, config_entry.data, "/lights/1/state")
 
-    # Service turn on fan
+    # Service turn on fan using saved default_on_speed
 
     await hass.services.async_call(
         FAN_DOMAIN,
@@ -100,6 +154,265 @@ async def test_fans(hass, aioclient_mock, mock_deconz_websocket):
     )
     assert aioclient_mock.mock_calls[2][2] == {"speed": 0}
 
+    # Service turn on fan to 20%
+
+    await hass.services.async_call(
+        FAN_DOMAIN,
+        SERVICE_TURN_ON,
+        {ATTR_ENTITY_ID: "fan.ceiling_fan", ATTR_PERCENTAGE: 20},
+        blocking=True,
+    )
+    assert aioclient_mock.mock_calls[3][2] == {"speed": 1}
+
+    # Service set fan percentage to 20%
+
+    await hass.services.async_call(
+        FAN_DOMAIN,
+        SERVICE_SET_PERCENTAGE,
+        {ATTR_ENTITY_ID: "fan.ceiling_fan", ATTR_PERCENTAGE: 20},
+        blocking=True,
+    )
+    assert aioclient_mock.mock_calls[4][2] == {"speed": 1}
+
+    # Service set fan percentage to 40%
+
+    await hass.services.async_call(
+        FAN_DOMAIN,
+        SERVICE_SET_PERCENTAGE,
+        {ATTR_ENTITY_ID: "fan.ceiling_fan", ATTR_PERCENTAGE: 40},
+        blocking=True,
+    )
+    assert aioclient_mock.mock_calls[5][2] == {"speed": 2}
+
+    # Service set fan percentage to 60%
+
+    await hass.services.async_call(
+        FAN_DOMAIN,
+        SERVICE_SET_PERCENTAGE,
+        {ATTR_ENTITY_ID: "fan.ceiling_fan", ATTR_PERCENTAGE: 60},
+        blocking=True,
+    )
+    assert aioclient_mock.mock_calls[6][2] == {"speed": 3}
+
+    # Service set fan percentage to 80%
+
+    await hass.services.async_call(
+        FAN_DOMAIN,
+        SERVICE_SET_PERCENTAGE,
+        {ATTR_ENTITY_ID: "fan.ceiling_fan", ATTR_PERCENTAGE: 80},
+        blocking=True,
+    )
+    assert aioclient_mock.mock_calls[7][2] == {"speed": 4}
+
+    # Service set fan percentage to 0% does not equal off
+
+    await hass.services.async_call(
+        FAN_DOMAIN,
+        SERVICE_SET_PERCENTAGE,
+        {ATTR_ENTITY_ID: "fan.ceiling_fan", ATTR_PERCENTAGE: 0},
+        blocking=True,
+    )
+    assert aioclient_mock.mock_calls[8][2] == {"speed": 1}
+
+    # Events with an unsupported speed does not get converted
+
+    event_changed_light = {
+        "t": "event",
+        "e": "changed",
+        "r": "lights",
+        "id": "1",
+        "state": {"speed": 5},
+    }
+    await mock_deconz_websocket(data=event_changed_light)
+    await hass.async_block_till_done()
+
+    assert hass.states.get("fan.ceiling_fan").state == STATE_ON
+    assert not hass.states.get("fan.ceiling_fan").attributes[ATTR_PERCENTAGE]
+
+    await hass.config_entries.async_unload(config_entry.entry_id)
+
+    states = hass.states.async_all()
+    assert len(states) == 2
+    for state in states:
+        assert state.state == STATE_UNAVAILABLE
+
+    await hass.config_entries.async_remove(config_entry.entry_id)
+    await hass.async_block_till_done()
+    assert len(hass.states.async_all()) == 0
+
+
+async def test_fans_legacy_speed_modes(hass, aioclient_mock, mock_deconz_websocket):
+    """Test that all supported fan entities are created.
+
+    Legacy fan support.
+    """
+    data = {
+        "lights": {
+            "1": {
+                "etag": "432f3de28965052961a99e3c5494daf4",
+                "hascolor": False,
+                "manufacturername": "King Of Fans,  Inc.",
+                "modelid": "HDC52EastwindFan",
+                "name": "Ceiling fan",
+                "state": {
+                    "alert": "none",
+                    "bri": 254,
+                    "on": False,
+                    "reachable": True,
+                    "speed": 4,
+                },
+                "swversion": "0000000F",
+                "type": "Fan",
+                "uniqueid": "00:22:a3:00:00:27:8b:81-01",
+            }
+        }
+    }
+
+    with patch.dict(DECONZ_WEB_REQUEST, data):
+        config_entry = await setup_deconz_integration(hass, aioclient_mock)
+
+    assert len(hass.states.async_all()) == 2  # Light and fan
+    assert hass.states.get("fan.ceiling_fan").state == STATE_ON
+    assert hass.states.get("fan.ceiling_fan").attributes[ATTR_SPEED] == SPEED_HIGH
+
+    # Test states
+
+    event_changed_light = {
+        "t": "event",
+        "e": "changed",
+        "r": "lights",
+        "id": "1",
+        "state": {"speed": 1},
+    }
+    await mock_deconz_websocket(data=event_changed_light)
+    await hass.async_block_till_done()
+
+    assert hass.states.get("fan.ceiling_fan").state == STATE_ON
+    assert hass.states.get("fan.ceiling_fan").attributes[ATTR_PERCENTAGE] == 25
+    assert hass.states.get("fan.ceiling_fan").attributes[ATTR_SPEED] == SPEED_LOW
+
+    event_changed_light = {
+        "t": "event",
+        "e": "changed",
+        "r": "lights",
+        "id": "1",
+        "state": {"speed": 2},
+    }
+    await mock_deconz_websocket(data=event_changed_light)
+    await hass.async_block_till_done()
+
+    assert hass.states.get("fan.ceiling_fan").state == STATE_ON
+    assert hass.states.get("fan.ceiling_fan").attributes[ATTR_PERCENTAGE] == 50
+    assert hass.states.get("fan.ceiling_fan").attributes[ATTR_SPEED] == SPEED_MEDIUM
+
+    event_changed_light = {
+        "t": "event",
+        "e": "changed",
+        "r": "lights",
+        "id": "1",
+        "state": {"speed": 3},
+    }
+    await mock_deconz_websocket(data=event_changed_light)
+    await hass.async_block_till_done()
+
+    assert hass.states.get("fan.ceiling_fan").state == STATE_ON
+    assert hass.states.get("fan.ceiling_fan").attributes[ATTR_PERCENTAGE] == 75
+    assert hass.states.get("fan.ceiling_fan").attributes[ATTR_SPEED] == SPEED_MEDIUM
+
+    event_changed_light = {
+        "t": "event",
+        "e": "changed",
+        "r": "lights",
+        "id": "1",
+        "state": {"speed": 4},
+    }
+    await mock_deconz_websocket(data=event_changed_light)
+    await hass.async_block_till_done()
+
+    assert hass.states.get("fan.ceiling_fan").state == STATE_ON
+    assert hass.states.get("fan.ceiling_fan").attributes[ATTR_PERCENTAGE] == 100
+    assert hass.states.get("fan.ceiling_fan").attributes[ATTR_SPEED] == SPEED_HIGH
+
+    event_changed_light = {
+        "t": "event",
+        "e": "changed",
+        "r": "lights",
+        "id": "1",
+        "state": {"speed": 0},
+    }
+    await mock_deconz_websocket(data=event_changed_light)
+    await hass.async_block_till_done()
+
+    assert hass.states.get("fan.ceiling_fan").state == STATE_OFF
+    assert hass.states.get("fan.ceiling_fan").attributes[ATTR_PERCENTAGE] == 0
+    assert hass.states.get("fan.ceiling_fan").attributes[ATTR_SPEED] == SPEED_OFF
+
+    # Test service calls
+
+    mock_deconz_put_request(aioclient_mock, config_entry.data, "/lights/1/state")
+
+    # Service turn on fan using saved default_on_speed
+
+    await hass.services.async_call(
+        FAN_DOMAIN,
+        SERVICE_TURN_ON,
+        {ATTR_ENTITY_ID: "fan.ceiling_fan"},
+        blocking=True,
+    )
+    assert aioclient_mock.mock_calls[1][2] == {"speed": 4}
+
+    # Service turn on fan with speed_off
+    # async_turn_on_compat use speed_to_percentage which will return 0
+
+    await hass.services.async_call(
+        FAN_DOMAIN,
+        SERVICE_TURN_ON,
+        {ATTR_ENTITY_ID: "fan.ceiling_fan", ATTR_SPEED: SPEED_OFF},
+        blocking=True,
+    )
+    assert aioclient_mock.mock_calls[2][2] == {"speed": 1}
+
+    # Service turn on fan with bad speed
+    # async_turn_on_compat use speed_to_percentage which will convert to SPEED_MEDIUM -> 2
+
+    await hass.services.async_call(
+        FAN_DOMAIN,
+        SERVICE_TURN_ON,
+        {ATTR_ENTITY_ID: "fan.ceiling_fan", ATTR_SPEED: "bad"},
+        blocking=True,
+    )
+    assert aioclient_mock.mock_calls[3][2] == {"speed": 2}
+
+    # Service turn on fan to low speed
+
+    await hass.services.async_call(
+        FAN_DOMAIN,
+        SERVICE_TURN_ON,
+        {ATTR_ENTITY_ID: "fan.ceiling_fan", ATTR_SPEED: SPEED_LOW},
+        blocking=True,
+    )
+    assert aioclient_mock.mock_calls[4][2] == {"speed": 1}
+
+    # Service turn on fan to medium speed
+
+    await hass.services.async_call(
+        FAN_DOMAIN,
+        SERVICE_TURN_ON,
+        {ATTR_ENTITY_ID: "fan.ceiling_fan", ATTR_SPEED: SPEED_MEDIUM},
+        blocking=True,
+    )
+    assert aioclient_mock.mock_calls[5][2] == {"speed": 2}
+
+    # Service turn on fan to high speed
+
+    await hass.services.async_call(
+        FAN_DOMAIN,
+        SERVICE_TURN_ON,
+        {ATTR_ENTITY_ID: "fan.ceiling_fan", ATTR_SPEED: SPEED_HIGH},
+        blocking=True,
+    )
+    assert aioclient_mock.mock_calls[6][2] == {"speed": 4}
+
     # Service set fan speed to low
 
     await hass.services.async_call(
@@ -108,7 +421,7 @@ async def test_fans(hass, aioclient_mock, mock_deconz_websocket):
         {ATTR_ENTITY_ID: "fan.ceiling_fan", ATTR_SPEED: SPEED_LOW},
         blocking=True,
     )
-    assert aioclient_mock.mock_calls[3][2] == {"speed": 1}
+    assert aioclient_mock.mock_calls[7][2] == {"speed": 1}
 
     # Service set fan speed to medium
 
@@ -118,7 +431,7 @@ async def test_fans(hass, aioclient_mock, mock_deconz_websocket):
         {ATTR_ENTITY_ID: "fan.ceiling_fan", ATTR_SPEED: SPEED_MEDIUM},
         blocking=True,
     )
-    assert aioclient_mock.mock_calls[4][2] == {"speed": 2}
+    assert aioclient_mock.mock_calls[8][2] == {"speed": 2}
 
     # Service set fan speed to high
 
@@ -128,7 +441,7 @@ async def test_fans(hass, aioclient_mock, mock_deconz_websocket):
         {ATTR_ENTITY_ID: "fan.ceiling_fan", ATTR_SPEED: SPEED_HIGH},
         blocking=True,
     )
-    assert aioclient_mock.mock_calls[5][2] == {"speed": 4}
+    assert aioclient_mock.mock_calls[9][2] == {"speed": 4}
 
     # Service set fan speed to off
 
@@ -138,7 +451,7 @@ async def test_fans(hass, aioclient_mock, mock_deconz_websocket):
         {ATTR_ENTITY_ID: "fan.ceiling_fan", ATTR_SPEED: SPEED_OFF},
         blocking=True,
     )
-    assert aioclient_mock.mock_calls[6][2] == {"speed": 0}
+    assert aioclient_mock.mock_calls[10][2] == {"speed": 0}
 
     # Service set fan speed to unsupported value