diff --git a/homeassistant/components/deconz/const.py b/homeassistant/components/deconz/const.py
index d965b6485f8..cbad37b1b87 100644
--- a/homeassistant/components/deconz/const.py
+++ b/homeassistant/components/deconz/const.py
@@ -4,6 +4,7 @@ import logging
 from homeassistant.components.binary_sensor import DOMAIN as BINARY_SENSOR_DOMAIN
 from homeassistant.components.climate import DOMAIN as CLIMATE_DOMAIN
 from homeassistant.components.cover import DOMAIN as COVER_DOMAIN
+from homeassistant.components.fan import DOMAIN as FAN_DOMAIN
 from homeassistant.components.light import DOMAIN as LIGHT_DOMAIN
 from homeassistant.components.lock import DOMAIN as LOCK_DOMAIN
 from homeassistant.components.scene import DOMAIN as SCENE_DOMAIN
@@ -31,6 +32,7 @@ SUPPORTED_PLATFORMS = [
     BINARY_SENSOR_DOMAIN,
     CLIMATE_DOMAIN,
     COVER_DOMAIN,
+    FAN_DOMAIN,
     LIGHT_DOMAIN,
     LOCK_DOMAIN,
     SCENE_DOMAIN,
@@ -53,6 +55,9 @@ DAMPERS = ["Level controllable output"]
 WINDOW_COVERS = ["Window covering device", "Window covering controller"]
 COVER_TYPES = DAMPERS + WINDOW_COVERS
 
+# Fans
+FANS = ["Fan"]
+
 # Locks
 LOCKS = ["Door Lock"]
 LOCK_TYPES = LOCKS
diff --git a/homeassistant/components/deconz/fan.py b/homeassistant/components/deconz/fan.py
new file mode 100644
index 00000000000..f33b2ca86ba
--- /dev/null
+++ b/homeassistant/components/deconz/fan.py
@@ -0,0 +1,119 @@
+"""Support for deCONZ switches."""
+from homeassistant.components.fan import (
+    DOMAIN,
+    SPEED_HIGH,
+    SPEED_LOW,
+    SPEED_MEDIUM,
+    SPEED_OFF,
+    SUPPORT_SET_SPEED,
+    FanEntity,
+)
+from homeassistant.core import callback
+from homeassistant.helpers.dispatcher import async_dispatcher_connect
+
+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}
+
+
+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
+
+
+async def async_setup_entry(hass, config_entry, async_add_entities) -> None:
+    """Set up fans for deCONZ component.
+
+    Fans are based on the same device class as lights in deCONZ.
+    """
+    gateway = get_gateway_from_config_entry(hass, config_entry)
+    gateway.entities[DOMAIN] = set()
+
+    @callback
+    def async_add_fan(lights) -> None:
+        """Add fan from deCONZ."""
+        entities = []
+
+        for light in lights:
+
+            if light.type in FANS and light.uniqueid not in gateway.entities[DOMAIN]:
+                entities.append(DeconzFan(light, gateway))
+
+        if entities:
+            async_add_entities(entities, True)
+
+    gateway.listeners.append(
+        async_dispatcher_connect(
+            hass, gateway.async_signal_new_device(NEW_LIGHT), async_add_fan
+        )
+    )
+
+    async_add_fan(gateway.api.lights.values())
+
+
+class DeconzFan(DeconzDevice, FanEntity):
+    """Representation of a deCONZ fan."""
+
+    TYPE = DOMAIN
+
+    def __init__(self, device, gateway) -> None:
+        """Set up fan."""
+        super().__init__(device, gateway)
+
+        self._default_on_speed = SPEEDS[SPEED_MEDIUM]
+        if self.speed != SPEED_OFF:
+            self._default_on_speed = self._device.speed
+
+        self._features = SUPPORT_SET_SPEED
+
+    @property
+    def is_on(self) -> bool:
+        """Return true if fan is on."""
+        return self.speed != SPEED_OFF
+
+    @property
+    def speed(self) -> int:
+        """Return the current speed."""
+        return convert_speed(self._device.speed)
+
+    @property
+    def speed_list(self) -> list:
+        """Get the list of available speeds."""
+        return list(SPEEDS)
+
+    @property
+    def supported_features(self) -> int:
+        """Flag supported features."""
+        return self._features
+
+    @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:
+            self._default_on_speed = self._device.speed
+        super().async_update_callback(force_update)
+
+    async def async_set_speed(self, speed: str) -> None:
+        """Set the speed of the fan."""
+        data = {"speed": SPEEDS[speed]}
+        await self._device.async_set_state(data)
+
+    async def async_turn_on(self, speed: str = None, **kwargs) -> None:
+        """Turn on fan."""
+        if not speed:
+            speed = convert_speed(self._default_on_speed)
+        await self.async_set_speed(speed)
+
+    async def async_turn_off(self, **kwargs) -> None:
+        """Turn off fan."""
+        await self.async_set_speed(SPEED_OFF)
diff --git a/tests/components/deconz/test_fan.py b/tests/components/deconz/test_fan.py
new file mode 100644
index 00000000000..460682aac09
--- /dev/null
+++ b/tests/components/deconz/test_fan.py
@@ -0,0 +1,185 @@
+"""deCONZ fan platform tests."""
+from copy import deepcopy
+
+from homeassistant.components import deconz
+from homeassistant.components.deconz.gateway import get_gateway_from_config_entry
+import homeassistant.components.fan as fan
+from homeassistant.const import STATE_OFF, STATE_ON
+from homeassistant.setup import async_setup_component
+
+from .test_gateway import DECONZ_WEB_REQUEST, setup_deconz_integration
+
+from tests.async_mock import patch
+
+FANS = {
+    "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",
+    }
+}
+
+
+async def test_platform_manually_configured(hass):
+    """Test that we do not discover anything or try to set up a gateway."""
+    assert (
+        await async_setup_component(
+            hass, fan.DOMAIN, {"fan": {"platform": deconz.DOMAIN}}
+        )
+        is True
+    )
+    assert deconz.DOMAIN not in hass.data
+
+
+async def test_no_fans(hass):
+    """Test that no fan entities are created."""
+    await setup_deconz_integration(hass)
+    assert len(hass.states.async_all()) == 0
+
+
+async def test_fans(hass):
+    """Test that all supported fan entities are created."""
+    data = deepcopy(DECONZ_WEB_REQUEST)
+    data["lights"] = deepcopy(FANS)
+    config_entry = await setup_deconz_integration(hass, get_state_response=data)
+    gateway = get_gateway_from_config_entry(hass, config_entry)
+
+    assert len(hass.states.async_all()) == 2  # Light and fan
+    assert hass.states.get("fan.ceiling_fan")
+
+    # Test states
+
+    assert hass.states.get("fan.ceiling_fan").state == STATE_ON
+    assert hass.states.get("fan.ceiling_fan").attributes["speed"] == fan.SPEED_HIGH
+
+    state_changed_event = {
+        "t": "event",
+        "e": "changed",
+        "r": "lights",
+        "id": "1",
+        "state": {"speed": 0},
+    }
+    gateway.api.event_handler(state_changed_event)
+    await hass.async_block_till_done()
+
+    assert hass.states.get("fan.ceiling_fan").state == STATE_OFF
+    assert hass.states.get("fan.ceiling_fan").attributes["speed"] == fan.SPEED_OFF
+
+    # Test service calls
+
+    ceiling_fan_device = gateway.api.lights["1"]
+
+    # Service turn on fan
+
+    with patch.object(
+        ceiling_fan_device, "_request", return_value=True
+    ) as set_callback:
+        await hass.services.async_call(
+            fan.DOMAIN,
+            fan.SERVICE_TURN_ON,
+            {"entity_id": "fan.ceiling_fan"},
+            blocking=True,
+        )
+        await hass.async_block_till_done()
+        set_callback.assert_called_with("put", "/lights/1/state", json={"speed": 4})
+
+    # Service turn off fan
+
+    with patch.object(
+        ceiling_fan_device, "_request", return_value=True
+    ) as set_callback:
+        await hass.services.async_call(
+            fan.DOMAIN,
+            fan.SERVICE_TURN_OFF,
+            {"entity_id": "fan.ceiling_fan"},
+            blocking=True,
+        )
+        await hass.async_block_till_done()
+        set_callback.assert_called_with("put", "/lights/1/state", json={"speed": 0})
+
+    # Service set fan speed to low
+
+    with patch.object(
+        ceiling_fan_device, "_request", return_value=True
+    ) as set_callback:
+        await hass.services.async_call(
+            fan.DOMAIN,
+            fan.SERVICE_SET_SPEED,
+            {"entity_id": "fan.ceiling_fan", fan.ATTR_SPEED: fan.SPEED_LOW},
+            blocking=True,
+        )
+        await hass.async_block_till_done()
+        set_callback.assert_called_with("put", "/lights/1/state", json={"speed": 1})
+
+    # Service set fan speed to medium
+
+    with patch.object(
+        ceiling_fan_device, "_request", return_value=True
+    ) as set_callback:
+        await hass.services.async_call(
+            fan.DOMAIN,
+            fan.SERVICE_SET_SPEED,
+            {"entity_id": "fan.ceiling_fan", fan.ATTR_SPEED: fan.SPEED_MEDIUM},
+            blocking=True,
+        )
+        await hass.async_block_till_done()
+        set_callback.assert_called_with("put", "/lights/1/state", json={"speed": 2})
+
+    # Service set fan speed to high
+
+    with patch.object(
+        ceiling_fan_device, "_request", return_value=True
+    ) as set_callback:
+        await hass.services.async_call(
+            fan.DOMAIN,
+            fan.SERVICE_SET_SPEED,
+            {"entity_id": "fan.ceiling_fan", fan.ATTR_SPEED: fan.SPEED_HIGH},
+            blocking=True,
+        )
+        await hass.async_block_till_done()
+        set_callback.assert_called_with("put", "/lights/1/state", json={"speed": 4})
+
+    # Service set fan speed to off
+
+    with patch.object(
+        ceiling_fan_device, "_request", return_value=True
+    ) as set_callback:
+        await hass.services.async_call(
+            fan.DOMAIN,
+            fan.SERVICE_SET_SPEED,
+            {"entity_id": "fan.ceiling_fan", fan.ATTR_SPEED: fan.SPEED_OFF},
+            blocking=True,
+        )
+        await hass.async_block_till_done()
+        set_callback.assert_called_with("put", "/lights/1/state", json={"speed": 0})
+
+    # Verify that an unsupported speed gets converted to default speed "medium"
+
+    state_changed_event = {
+        "t": "event",
+        "e": "changed",
+        "r": "lights",
+        "id": "1",
+        "state": {"speed": 3},
+    }
+    gateway.api.event_handler(state_changed_event)
+    await hass.async_block_till_done()
+
+    assert hass.states.get("fan.ceiling_fan").state == STATE_ON
+    assert hass.states.get("fan.ceiling_fan").attributes["speed"] == fan.SPEED_MEDIUM
+
+    await hass.config_entries.async_unload(config_entry.entry_id)
+
+    assert len(hass.states.async_all()) == 0
diff --git a/tests/components/deconz/test_gateway.py b/tests/components/deconz/test_gateway.py
index 11516b36eca..c54267c1d03 100644
--- a/tests/components/deconz/test_gateway.py
+++ b/tests/components/deconz/test_gateway.py
@@ -90,11 +90,12 @@ async def test_gateway_setup(hass):
         assert forward_entry_setup.mock_calls[0][1] == (config_entry, "binary_sensor")
         assert forward_entry_setup.mock_calls[1][1] == (config_entry, "climate")
         assert forward_entry_setup.mock_calls[2][1] == (config_entry, "cover")
-        assert forward_entry_setup.mock_calls[3][1] == (config_entry, "light")
-        assert forward_entry_setup.mock_calls[4][1] == (config_entry, "lock")
-        assert forward_entry_setup.mock_calls[5][1] == (config_entry, "scene")
-        assert forward_entry_setup.mock_calls[6][1] == (config_entry, "sensor")
-        assert forward_entry_setup.mock_calls[7][1] == (config_entry, "switch")
+        assert forward_entry_setup.mock_calls[3][1] == (config_entry, "fan")
+        assert forward_entry_setup.mock_calls[4][1] == (config_entry, "light")
+        assert forward_entry_setup.mock_calls[5][1] == (config_entry, "lock")
+        assert forward_entry_setup.mock_calls[6][1] == (config_entry, "scene")
+        assert forward_entry_setup.mock_calls[7][1] == (config_entry, "sensor")
+        assert forward_entry_setup.mock_calls[8][1] == (config_entry, "switch")
 
 
 async def test_gateway_retry(hass):