Add additional characteristics for Airversa Homekit Air Purifiers (#85660)

homeassistant/components/homekit_controller/sensor.py

@@ -331,6 +331,12 @@ SIMPLE_SENSOR: dict[str, HomeKitSensorEntityDescription] = {
         native_unit_of_measurement=UnitOfSoundPressure.DECIBEL,
         device_class=SensorDeviceClass.SOUND_PRESSURE,
     ),
+    CharacteristicsTypes.FILTER_LIFE_LEVEL: HomeKitSensorEntityDescription(
+        key=CharacteristicsTypes.FILTER_LIFE_LEVEL,
+        name="Filter Life",
+        state_class=SensorStateClass.MEASUREMENT,
+        native_unit_of_measurement=PERCENTAGE,
+    ),
 }