diff --git a/homeassistant/components/lg_thinq/number.py b/homeassistant/components/lg_thinq/number.py
index 7003519e0ce..ac8991d6bb5 100644
--- a/homeassistant/components/lg_thinq/number.py
+++ b/homeassistant/components/lg_thinq/number.py
@@ -123,6 +123,9 @@ DEVICE_TYPE_NUMBER_MAP: dict[DeviceType, tuple[NumberEntityDescription, ...]] =
         NUMBER_DESC[ThinQProperty.LIGHT_STATUS],
         NUMBER_DESC[ThinQProperty.TARGET_TEMPERATURE],
     ),
+    DeviceType.VENTILATOR: (
+        TIMER_NUMBER_DESC[ThinQProperty.SLEEP_TIMER_RELATIVE_HOUR_TO_STOP],
+    ),
 }
 
 _LOGGER = logging.getLogger(__name__)