diff --git a/homeassistant/components/eq3btsmart/__init__.py b/homeassistant/components/eq3btsmart/__init__.py
index f63e627ea7d..bdba17dcca5 100644
--- a/homeassistant/components/eq3btsmart/__init__.py
+++ b/homeassistant/components/eq3btsmart/__init__.py
@@ -15,7 +15,7 @@ from homeassistant.core import HomeAssistant
 from homeassistant.exceptions import ConfigEntryNotReady
 from homeassistant.helpers.dispatcher import async_dispatcher_send
 
-from .const import DOMAIN, SIGNAL_THERMOSTAT_CONNECTED, SIGNAL_THERMOSTAT_DISCONNECTED
+from .const import SIGNAL_THERMOSTAT_CONNECTED, SIGNAL_THERMOSTAT_DISCONNECTED
 from .models import Eq3Config, Eq3ConfigEntryData
 
 PLATFORMS = [
@@ -25,7 +25,10 @@ PLATFORMS = [
 _LOGGER = logging.getLogger(__name__)
 
 
-async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
+type Eq3ConfigEntry = ConfigEntry[Eq3ConfigEntryData]
+
+
+async def async_setup_entry(hass: HomeAssistant, entry: Eq3ConfigEntry) -> bool:
     """Handle config entry setup."""
 
     mac_address: str | None = entry.unique_id
@@ -53,12 +56,11 @@ async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
         ble_device=device,
     )
 
-    eq3_config_entry = Eq3ConfigEntryData(eq3_config=eq3_config, thermostat=thermostat)
-    hass.data.setdefault(DOMAIN, {})[entry.entry_id] = eq3_config_entry
-
+    entry.runtime_data = Eq3ConfigEntryData(
+        eq3_config=eq3_config, thermostat=thermostat
+    )
     entry.async_on_unload(entry.add_update_listener(update_listener))
     await hass.config_entries.async_forward_entry_setups(entry, PLATFORMS)
-
     entry.async_create_background_task(
         hass, _async_run_thermostat(hass, entry), entry.entry_id
     )
@@ -66,29 +68,27 @@ async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
     return True
 
 
-async def async_unload_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
+async def async_unload_entry(hass: HomeAssistant, entry: Eq3ConfigEntry) -> bool:
     """Handle config entry unload."""
 
     if unload_ok := await hass.config_entries.async_unload_platforms(entry, PLATFORMS):
-        eq3_config_entry: Eq3ConfigEntryData = hass.data[DOMAIN].pop(entry.entry_id)
-        await eq3_config_entry.thermostat.async_disconnect()
+        await entry.runtime_data.thermostat.async_disconnect()
 
     return unload_ok
 
 
-async def update_listener(hass: HomeAssistant, entry: ConfigEntry) -> None:
+async def update_listener(hass: HomeAssistant, entry: Eq3ConfigEntry) -> None:
     """Handle config entry update."""
 
     await hass.config_entries.async_reload(entry.entry_id)
 
 
-async def _async_run_thermostat(hass: HomeAssistant, entry: ConfigEntry) -> None:
+async def _async_run_thermostat(hass: HomeAssistant, entry: Eq3ConfigEntry) -> None:
     """Run the thermostat."""
 
-    eq3_config_entry: Eq3ConfigEntryData = hass.data[DOMAIN][entry.entry_id]
-    thermostat = eq3_config_entry.thermostat
-    mac_address = eq3_config_entry.eq3_config.mac_address
-    scan_interval = eq3_config_entry.eq3_config.scan_interval
+    thermostat = entry.runtime_data.thermostat
+    mac_address = entry.runtime_data.eq3_config.mac_address
+    scan_interval = entry.runtime_data.eq3_config.scan_interval
 
     await _async_reconnect_thermostat(hass, entry)
 
@@ -117,13 +117,14 @@ async def _async_run_thermostat(hass: HomeAssistant, entry: ConfigEntry) -> None
         await asyncio.sleep(scan_interval)
 
 
-async def _async_reconnect_thermostat(hass: HomeAssistant, entry: ConfigEntry) -> None:
+async def _async_reconnect_thermostat(
+    hass: HomeAssistant, entry: Eq3ConfigEntry
+) -> None:
     """Reconnect the thermostat."""
 
-    eq3_config_entry: Eq3ConfigEntryData = hass.data[DOMAIN][entry.entry_id]
-    thermostat = eq3_config_entry.thermostat
-    mac_address = eq3_config_entry.eq3_config.mac_address
-    scan_interval = eq3_config_entry.eq3_config.scan_interval
+    thermostat = entry.runtime_data.thermostat
+    mac_address = entry.runtime_data.eq3_config.mac_address
+    scan_interval = entry.runtime_data.eq3_config.scan_interval
 
     while True:
         try:
diff --git a/homeassistant/components/eq3btsmart/climate.py b/homeassistant/components/eq3btsmart/climate.py
index 9984c4f7229..9153d0f97cf 100644
--- a/homeassistant/components/eq3btsmart/climate.py
+++ b/homeassistant/components/eq3btsmart/climate.py
@@ -3,7 +3,6 @@
 import logging
 from typing import Any
 
-from eq3btsmart import Thermostat
 from eq3btsmart.const import EQ3BT_MAX_TEMP, EQ3BT_OFF_TEMP, Eq3Preset, OperationMode
 from eq3btsmart.exceptions import Eq3Exception
 
@@ -15,7 +14,6 @@ from homeassistant.components.climate import (
     HVACAction,
     HVACMode,
 )
-from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import ATTR_TEMPERATURE, PRECISION_HALVES, UnitOfTemperature
 from homeassistant.core import HomeAssistant, callback
 from homeassistant.exceptions import ServiceValidationError
@@ -25,9 +23,9 @@ from homeassistant.helpers.dispatcher import async_dispatcher_connect
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.util import slugify
 
+from . import Eq3ConfigEntry
 from .const import (
     DEVICE_MODEL,
-    DOMAIN,
     EQ_TO_HA_HVAC,
     HA_TO_EQ_HVAC,
     MANUFACTURER,
@@ -38,22 +36,19 @@ from .const import (
     TargetTemperatureSelector,
 )
 from .entity import Eq3Entity
-from .models import Eq3Config, Eq3ConfigEntryData
 
 _LOGGER = logging.getLogger(__name__)
 
 
 async def async_setup_entry(
     hass: HomeAssistant,
-    config_entry: ConfigEntry,
+    entry: Eq3ConfigEntry,
     async_add_entities: AddEntitiesCallback,
 ) -> None:
     """Handle config entry setup."""
 
-    eq3_config_entry: Eq3ConfigEntryData = hass.data[DOMAIN][config_entry.entry_id]
-
     async_add_entities(
-        [Eq3Climate(eq3_config_entry.eq3_config, eq3_config_entry.thermostat)],
+        [Eq3Climate(entry)],
     )
 
 
@@ -80,11 +75,11 @@ class Eq3Climate(Eq3Entity, ClimateEntity):
     _attr_preset_mode: str | None = None
     _target_temperature: float | None = None
 
-    def __init__(self, eq3_config: Eq3Config, thermostat: Thermostat) -> None:
+    def __init__(self, entry: Eq3ConfigEntry) -> None:
         """Initialize the climate entity."""
 
-        super().__init__(eq3_config, thermostat)
-        self._attr_unique_id = dr.format_mac(eq3_config.mac_address)
+        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,
diff --git a/homeassistant/components/eq3btsmart/entity.py b/homeassistant/components/eq3btsmart/entity.py
index e8c00d4e3cf..020913176fb 100644
--- a/homeassistant/components/eq3btsmart/entity.py
+++ b/homeassistant/components/eq3btsmart/entity.py
@@ -1,10 +1,8 @@
 """Base class for all eQ-3 entities."""
 
-from eq3btsmart.thermostat import Thermostat
-
 from homeassistant.helpers.entity import Entity
 
-from .models import Eq3Config
+from . import Eq3ConfigEntry
 
 
 class Eq3Entity(Entity):
@@ -12,8 +10,8 @@ class Eq3Entity(Entity):
 
     _attr_has_entity_name = True
 
-    def __init__(self, eq3_config: Eq3Config, thermostat: Thermostat) -> None:
+    def __init__(self, entry: Eq3ConfigEntry) -> None:
         """Initialize the eq3 entity."""
 
-        self._eq3_config = eq3_config
-        self._thermostat = thermostat
+        self._eq3_config = entry.runtime_data.eq3_config
+        self._thermostat = entry.runtime_data.thermostat