diff --git a/homeassistant/components/shelly/binary_sensor.py b/homeassistant/components/shelly/binary_sensor.py
index ed2ac68d264..b74578f1fb3 100644
--- a/homeassistant/components/shelly/binary_sensor.py
+++ b/homeassistant/components/shelly/binary_sensor.py
@@ -130,6 +130,7 @@ SENSORS: dict[tuple[str, str], BlockBinarySensorDescription] = {
         device_class=BinarySensorDeviceClass.GAS,
         translation_key="gas",
         value=lambda value: value in ["mild", "heavy"],
+        # Deprecated, remove in 2025.10
         extra_state_attributes=lambda block: {"detected": block.gas},
     ),
     ("sensor", "smoke"): BlockBinarySensorDescription(
diff --git a/homeassistant/components/shelly/sensor.py b/homeassistant/components/shelly/sensor.py
index b6820921b4f..79e4c97aead 100644
--- a/homeassistant/components/shelly/sensor.py
+++ b/homeassistant/components/shelly/sensor.py
@@ -358,6 +358,7 @@ SENSORS: dict[tuple[str, str], BlockSensorDescription] = {
         translation_key="lamp_life",
         value=get_shelly_air_lamp_life,
         suggested_display_precision=1,
+        # Deprecated, remove in 2025.10
         extra_state_attributes=lambda block: {
             "Operational hours": round(cast(int, block.totalWorkTime) / 3600, 1)
         },
@@ -378,6 +379,7 @@ SENSORS: dict[tuple[str, str], BlockSensorDescription] = {
         options=["warmup", "normal", "fault"],
         translation_key="operation",
         value=lambda value: None if value == "unknown" else value,
+        # Deprecated, remove in 2025.10
         extra_state_attributes=lambda block: {"self_test": block.selfTest},
     ),
     ("valve", "valve"): BlockSensorDescription(