diff --git a/homeassistant/components/eq3btsmart/climate.py b/homeassistant/components/eq3btsmart/climate.py
index 9153d0f97cf..ae01d0fc9a7 100644
--- a/homeassistant/components/eq3btsmart/climate.py
+++ b/homeassistant/components/eq3btsmart/climate.py
@@ -18,19 +18,13 @@ from homeassistant.const import ATTR_TEMPERATURE, PRECISION_HALVES, UnitOfTemper
 from homeassistant.core import HomeAssistant, callback
 from homeassistant.exceptions import ServiceValidationError
 from homeassistant.helpers import device_registry as dr
-from homeassistant.helpers.device_registry import CONNECTION_BLUETOOTH, DeviceInfo
-from homeassistant.helpers.dispatcher import async_dispatcher_connect
+from homeassistant.helpers.device_registry import CONNECTION_BLUETOOTH
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
-from homeassistant.util import slugify
 
 from . import Eq3ConfigEntry
 from .const import (
-    DEVICE_MODEL,
     EQ_TO_HA_HVAC,
     HA_TO_EQ_HVAC,
-    MANUFACTURER,
-    SIGNAL_THERMOSTAT_CONNECTED,
-    SIGNAL_THERMOSTAT_DISCONNECTED,
     CurrentTemperatureSelector,
     Preset,
     TargetTemperatureSelector,
@@ -75,53 +69,6 @@ class Eq3Climate(Eq3Entity, ClimateEntity):
     _attr_preset_mode: str | None = None
     _target_temperature: float | None = None
 
-    def __init__(self, entry: Eq3ConfigEntry) -> None:
-        """Initialize the climate entity."""
-
-        super().__init__(entry)
-        self._attr_unique_id = dr.format_mac(self._eq3_config.mac_address)
-        self._attr_device_info = DeviceInfo(
-            name=slugify(self._eq3_config.mac_address),
-            manufacturer=MANUFACTURER,
-            model=DEVICE_MODEL,
-            connections={(CONNECTION_BLUETOOTH, self._eq3_config.mac_address)},
-        )
-
-    async def async_added_to_hass(self) -> None:
-        """Run when entity about to be added to hass."""
-
-        self._thermostat.register_update_callback(self._async_on_updated)
-
-        self.async_on_remove(
-            async_dispatcher_connect(
-                self.hass,
-                f"{SIGNAL_THERMOSTAT_DISCONNECTED}_{self._eq3_config.mac_address}",
-                self._async_on_disconnected,
-            )
-        )
-        self.async_on_remove(
-            async_dispatcher_connect(
-                self.hass,
-                f"{SIGNAL_THERMOSTAT_CONNECTED}_{self._eq3_config.mac_address}",
-                self._async_on_connected,
-            )
-        )
-
-    async def async_will_remove_from_hass(self) -> None:
-        """Run when entity will be removed from hass."""
-
-        self._thermostat.unregister_update_callback(self._async_on_updated)
-
-    @callback
-    def _async_on_disconnected(self) -> None:
-        self._attr_available = False
-        self.async_write_ha_state()
-
-    @callback
-    def _async_on_connected(self) -> None:
-        self._attr_available = True
-        self.async_write_ha_state()
-
     @callback
     def _async_on_updated(self) -> None:
         """Handle updated data from the thermostat."""
@@ -132,7 +79,7 @@ class Eq3Climate(Eq3Entity, ClimateEntity):
         if self._thermostat.device_data is not None:
             self._async_on_device_updated()
 
-        self.async_write_ha_state()
+        super()._async_on_updated()
 
     @callback
     def _async_on_status_updated(self) -> None:
diff --git a/homeassistant/components/eq3btsmart/const.py b/homeassistant/components/eq3btsmart/const.py
index 111c4d0eba4..bb3c8b58119 100644
--- a/homeassistant/components/eq3btsmart/const.py
+++ b/homeassistant/components/eq3btsmart/const.py
@@ -20,7 +20,6 @@ DEVICE_MODEL = "CC-RT-BLE-EQ"
 
 GET_DEVICE_TIMEOUT = 5  # seconds
 
-
 EQ_TO_HA_HVAC: dict[OperationMode, HVACMode] = {
     OperationMode.OFF: HVACMode.OFF,
     OperationMode.ON: HVACMode.HEAT,
diff --git a/homeassistant/components/eq3btsmart/entity.py b/homeassistant/components/eq3btsmart/entity.py
index 020913176fb..5a229c632b2 100644
--- a/homeassistant/components/eq3btsmart/entity.py
+++ b/homeassistant/components/eq3btsmart/entity.py
@@ -1,8 +1,22 @@
 """Base class for all eQ-3 entities."""
 
+from homeassistant.core import callback
+from homeassistant.helpers.device_registry import (
+    CONNECTION_BLUETOOTH,
+    DeviceInfo,
+    format_mac,
+)
+from homeassistant.helpers.dispatcher import async_dispatcher_connect
 from homeassistant.helpers.entity import Entity
+from homeassistant.util import slugify
 
 from . import Eq3ConfigEntry
+from .const import (
+    DEVICE_MODEL,
+    MANUFACTURER,
+    SIGNAL_THERMOSTAT_CONNECTED,
+    SIGNAL_THERMOSTAT_DISCONNECTED,
+)
 
 
 class Eq3Entity(Entity):
@@ -10,8 +24,60 @@ class Eq3Entity(Entity):
 
     _attr_has_entity_name = True
 
-    def __init__(self, entry: Eq3ConfigEntry) -> None:
+    def __init__(self, entry: Eq3ConfigEntry, unique_id_key: str | None = None) -> None:
         """Initialize the eq3 entity."""
 
         self._eq3_config = entry.runtime_data.eq3_config
         self._thermostat = entry.runtime_data.thermostat
+        self._attr_device_info = DeviceInfo(
+            name=slugify(self._eq3_config.mac_address),
+            manufacturer=MANUFACTURER,
+            model=DEVICE_MODEL,
+            connections={(CONNECTION_BLUETOOTH, self._eq3_config.mac_address)},
+        )
+        suffix = f"_{unique_id_key}" if unique_id_key else ""
+        self._attr_unique_id = f"{format_mac(self._eq3_config.mac_address)}{suffix}"
+
+    async def async_added_to_hass(self) -> None:
+        """Run when entity about to be added to hass."""
+
+        self._thermostat.register_update_callback(self._async_on_updated)
+
+        self.async_on_remove(
+            async_dispatcher_connect(
+                self.hass,
+                f"{SIGNAL_THERMOSTAT_DISCONNECTED}_{self._eq3_config.mac_address}",
+                self._async_on_disconnected,
+            )
+        )
+        self.async_on_remove(
+            async_dispatcher_connect(
+                self.hass,
+                f"{SIGNAL_THERMOSTAT_CONNECTED}_{self._eq3_config.mac_address}",
+                self._async_on_connected,
+            )
+        )
+
+    async def async_will_remove_from_hass(self) -> None:
+        """Run when entity will be removed from hass."""
+
+        self._thermostat.unregister_update_callback(self._async_on_updated)
+
+    def _async_on_updated(self) -> None:
+        """Handle updated data from the thermostat."""
+
+        self.async_write_ha_state()
+
+    @callback
+    def _async_on_disconnected(self) -> None:
+        """Handle disconnection from the thermostat."""
+
+        self._attr_available = False
+        self.async_write_ha_state()
+
+    @callback
+    def _async_on_connected(self) -> None:
+        """Handle connection to the thermostat."""
+
+        self._attr_available = True
+        self.async_write_ha_state()