diff --git a/homeassistant/components/demo/fan.py b/homeassistant/components/demo/fan.py
index 4b75e817153..ee49f0a2e99 100644
--- a/homeassistant/components/demo/fan.py
+++ b/homeassistant/components/demo/fan.py
@@ -18,8 +18,8 @@ async def async_setup_platform(hass, config, async_add_entities, discovery_info=
     """Set up the demo fan platform."""
     async_add_entities(
         [
-            DemoFan(hass, "Living Room Fan", FULL_SUPPORT),
-            DemoFan(hass, "Ceiling Fan", LIMITED_SUPPORT),
+            DemoFan(hass, "fan1", "Living Room Fan", FULL_SUPPORT),
+            DemoFan(hass, "fan2", "Ceiling Fan", LIMITED_SUPPORT),
         ]
     )
 
@@ -32,9 +32,12 @@ async def async_setup_entry(hass, config_entry, async_add_entities):
 class DemoFan(FanEntity):
     """A demonstration fan component."""
 
-    def __init__(self, hass, name: str, supported_features: int) -> None:
+    def __init__(
+        self, hass, unique_id: str, name: str, supported_features: int
+    ) -> None:
         """Initialize the entity."""
         self.hass = hass
+        self._unique_id = unique_id
         self._supported_features = supported_features
         self._speed = STATE_OFF
         self._oscillating = None
@@ -46,6 +49,11 @@ class DemoFan(FanEntity):
         if supported_features & SUPPORT_DIRECTION:
             self._direction = "forward"
 
+    @property
+    def unique_id(self):
+        """Return the unique id."""
+        return self._unique_id
+
     @property
     def name(self) -> str:
         """Get entity name."""