diff --git a/.coveragerc b/.coveragerc
index f6ecdc3e718..9c02fb7f677 100644
--- a/.coveragerc
+++ b/.coveragerc
@@ -331,6 +331,9 @@ omit =
     homeassistant/components/environment_canada/weather.py
     homeassistant/components/envisalink/*
     homeassistant/components/ephember/climate.py
+    homeassistant/components/epion/__init__.py
+    homeassistant/components/epion/coordinator.py
+    homeassistant/components/epion/sensor.py
     homeassistant/components/epson/__init__.py
     homeassistant/components/epson/media_player.py
     homeassistant/components/epsonworkforce/sensor.py
diff --git a/CODEOWNERS b/CODEOWNERS
index 1288ea53591..d1aa09eb93c 100644
--- a/CODEOWNERS
+++ b/CODEOWNERS
@@ -359,6 +359,8 @@ build.json @home-assistant/supervisor
 /homeassistant/components/environment_canada/ @gwww @michaeldavie
 /tests/components/environment_canada/ @gwww @michaeldavie
 /homeassistant/components/ephember/ @ttroy50
+/homeassistant/components/epion/ @lhgravendeel
+/tests/components/epion/ @lhgravendeel
 /homeassistant/components/epson/ @pszafer
 /tests/components/epson/ @pszafer
 /homeassistant/components/epsonworkforce/ @ThaStealth
diff --git a/homeassistant/components/epion/__init__.py b/homeassistant/components/epion/__init__.py
new file mode 100644
index 00000000000..ed2f5559f32
--- /dev/null
+++ b/homeassistant/components/epion/__init__.py
@@ -0,0 +1,32 @@
+"""The Epion integration."""
+from __future__ import annotations
+
+from epion import Epion
+
+from homeassistant.config_entries import ConfigEntry
+from homeassistant.const import CONF_API_KEY, Platform
+from homeassistant.core import HomeAssistant
+
+from .const import DOMAIN
+from .coordinator import EpionCoordinator
+
+PLATFORMS = [Platform.SENSOR]
+
+
+async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
+    """Set up the Epion coordinator from a config entry."""
+    api = Epion(entry.data[CONF_API_KEY])
+    coordinator = EpionCoordinator(hass, api)
+    await coordinator.async_config_entry_first_refresh()
+
+    hass.data.setdefault(DOMAIN, {})[entry.entry_id] = coordinator
+    await hass.config_entries.async_forward_entry_setups(entry, PLATFORMS)
+    return True
+
+
+async def async_unload_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
+    """Unload Epion config entry."""
+    unload_ok = await hass.config_entries.async_unload_platforms(entry, PLATFORMS)
+    if unload_ok:
+        del hass.data[DOMAIN][entry.entry_id]
+    return unload_ok
diff --git a/homeassistant/components/epion/config_flow.py b/homeassistant/components/epion/config_flow.py
new file mode 100644
index 00000000000..7c89df94519
--- /dev/null
+++ b/homeassistant/components/epion/config_flow.py
@@ -0,0 +1,54 @@
+"""Config flow for Epion."""
+from __future__ import annotations
+
+import logging
+from typing import Any
+
+from epion import Epion, EpionAuthenticationError, EpionConnectionError
+import voluptuous as vol
+
+from homeassistant.config_entries import ConfigFlow
+from homeassistant.const import CONF_API_KEY
+from homeassistant.data_entry_flow import FlowResult
+
+from .const import DOMAIN
+
+_LOGGER = logging.getLogger(__name__)
+
+
+class EpionConfigFlow(ConfigFlow, domain=DOMAIN):
+    """Handle a config flow for Epion."""
+
+    VERSION = 1
+
+    async def async_step_user(
+        self, user_input: dict[str, Any] | None = None
+    ) -> FlowResult:
+        """Handle a flow initiated by the user."""
+        errors = {}
+        if user_input:
+            api = Epion(user_input[CONF_API_KEY])
+            try:
+                api_data = await self.hass.async_add_executor_job(api.get_current)
+            except EpionAuthenticationError:
+                errors["base"] = "invalid_auth"
+            except EpionConnectionError:
+                _LOGGER.error("Unexpected problem when configuring Epion API")
+                errors["base"] = "cannot_connect"
+            else:
+                await self.async_set_unique_id(api_data["accountId"])
+                self._abort_if_unique_id_configured()
+                return self.async_create_entry(
+                    title="Epion integration",
+                    data=user_input,
+                )
+
+        return self.async_show_form(
+            step_id="user",
+            data_schema=vol.Schema(
+                {
+                    vol.Required(CONF_API_KEY): str,
+                }
+            ),
+            errors=errors,
+        )
diff --git a/homeassistant/components/epion/const.py b/homeassistant/components/epion/const.py
new file mode 100644
index 00000000000..83f82261583
--- /dev/null
+++ b/homeassistant/components/epion/const.py
@@ -0,0 +1,5 @@
+"""Constants for the Epion API."""
+from datetime import timedelta
+
+DOMAIN = "epion"
+REFRESH_INTERVAL = timedelta(minutes=1)
diff --git a/homeassistant/components/epion/coordinator.py b/homeassistant/components/epion/coordinator.py
new file mode 100644
index 00000000000..3eb7efb5dc7
--- /dev/null
+++ b/homeassistant/components/epion/coordinator.py
@@ -0,0 +1,45 @@
+"""The Epion data coordinator."""
+
+import logging
+from typing import Any
+
+from epion import Epion, EpionAuthenticationError, EpionConnectionError
+
+from homeassistant.core import HomeAssistant
+from homeassistant.exceptions import ConfigEntryAuthFailed
+from homeassistant.helpers.update_coordinator import DataUpdateCoordinator, UpdateFailed
+
+from .const import REFRESH_INTERVAL
+
+_LOGGER = logging.getLogger(__name__)
+
+
+class EpionCoordinator(DataUpdateCoordinator[dict[str, Any]]):
+    """Epion data update coordinator."""
+
+    def __init__(self, hass: HomeAssistant, epion_api: Epion) -> None:
+        """Initialize the Epion coordinator."""
+        super().__init__(
+            hass,
+            _LOGGER,
+            name="Epion",
+            update_interval=REFRESH_INTERVAL,
+        )
+        self.epion_api = epion_api
+
+    async def _async_update_data(self) -> dict[str, Any]:
+        """Fetch data from Epion API and construct a dictionary with device IDs as keys."""
+        try:
+            response = await self.hass.async_add_executor_job(
+                self.epion_api.get_current
+            )
+        except EpionAuthenticationError as err:
+            _LOGGER.error("Authentication error with Epion API")
+            raise ConfigEntryAuthFailed from err
+        except EpionConnectionError as err:
+            _LOGGER.error("Epion API connection problem")
+            raise UpdateFailed(f"Error communicating with API: {err}") from err
+        device_data = {}
+        for epion_device in response["devices"]:
+            device_data[epion_device["deviceId"]] = epion_device
+        return device_data
diff --git a/homeassistant/components/epion/manifest.json b/homeassistant/components/epion/manifest.json
new file mode 100644
index 00000000000..a1b8497f7e2
--- /dev/null
+++ b/homeassistant/components/epion/manifest.json
@@ -0,0 +1,11 @@
+{
+  "domain": "epion",
+  "name": "Epion",
+  "codeowners": ["@lhgravendeel"],
+  "config_flow": true,
+  "documentation": "https://www.home-assistant.io/integrations/epion",
+  "integration_type": "hub",
+  "iot_class": "cloud_polling",
+  "loggers": ["epion"],
+  "requirements": ["epion==0.0.3"]
+}
diff --git a/homeassistant/components/epion/sensor.py b/homeassistant/components/epion/sensor.py
new file mode 100644
index 00000000000..826d565c2cd
--- /dev/null
+++ b/homeassistant/components/epion/sensor.py
@@ -0,0 +1,113 @@
+"""Support for Epion API."""
+from __future__ import annotations
+
+from typing import Any
+
+from homeassistant.components.sensor import (
+    SensorDeviceClass,
+    SensorEntity,
+    SensorEntityDescription,
+    SensorStateClass,
+)
+from homeassistant.config_entries import ConfigEntry
+from homeassistant.const import (
+    CONCENTRATION_PARTS_PER_MILLION,
+    PERCENTAGE,
+    UnitOfPressure,
+    UnitOfTemperature,
+)
+from homeassistant.core import HomeAssistant
+from homeassistant.helpers.device_registry import DeviceInfo
+from homeassistant.helpers.entity_platform import AddEntitiesCallback
+from homeassistant.helpers.update_coordinator import CoordinatorEntity
+
+from .const import DOMAIN
+from .coordinator import EpionCoordinator
+
+SENSOR_TYPES: tuple[SensorEntityDescription, ...] = (
+    SensorEntityDescription(
+        device_class=SensorDeviceClass.CO2,
+        state_class=SensorStateClass.MEASUREMENT,
+        native_unit_of_measurement=CONCENTRATION_PARTS_PER_MILLION,
+        key="co2",
+        suggested_display_precision=0,
+    ),
+    SensorEntityDescription(
+        device_class=SensorDeviceClass.TEMPERATURE,
+        state_class=SensorStateClass.MEASUREMENT,
+        native_unit_of_measurement=UnitOfTemperature.CELSIUS,
+        key="temperature",
+        suggested_display_precision=1,
+    ),
+    SensorEntityDescription(
+        device_class=SensorDeviceClass.HUMIDITY,
+        state_class=SensorStateClass.MEASUREMENT,
+        native_unit_of_measurement=PERCENTAGE,
+        key="humidity",
+        suggested_display_precision=1,
+    ),
+    SensorEntityDescription(
+        device_class=SensorDeviceClass.ATMOSPHERIC_PRESSURE,
+        state_class=SensorStateClass.MEASUREMENT,
+        native_unit_of_measurement=UnitOfPressure.HPA,
+        key="pressure",
+        suggested_display_precision=0,
+    ),
+)
+
+
+async def async_setup_entry(
+    hass: HomeAssistant,
+    entry: ConfigEntry,
+    async_add_entities: AddEntitiesCallback,
+) -> None:
+    """Add an Epion entry."""
+    coordinator: EpionCoordinator = hass.data[DOMAIN][entry.entry_id]
+
+    entities = [
+        EpionSensor(coordinator, epion_device_id, description)
+        for epion_device_id in coordinator.data
+        for description in SENSOR_TYPES
+    ]
+
+    async_add_entities(entities)
+
+
+class EpionSensor(CoordinatorEntity[EpionCoordinator], SensorEntity):
+    """Representation of an Epion Air sensor."""
+
+    _attr_has_entity_name = True
+
+    def __init__(
+        self,
+        coordinator: EpionCoordinator,
+        epion_device_id: str,
+        description: SensorEntityDescription,
+    ) -> None:
+        """Initialize an EpionSensor."""
+        super().__init__(coordinator)
+        self._epion_device_id = epion_device_id
+        self.entity_description = description
+        self.unique_id = f"{epion_device_id}_{description.key}"
+        self._attr_device_info = DeviceInfo(
+            identifiers={(DOMAIN, self._epion_device_id)},
+            manufacturer="Epion",
+            name=self.device.get("deviceName"),
+            sw_version=self.device.get("fwVersion"),
+            model="Epion Air",
+        )
+
+    @property
+    def native_value(self) -> float | None:
+        """Return the value reported by the sensor, or None if the relevant sensor can't produce a current measurement."""
+        return self.device.get(self.entity_description.key)
+
+    @property
+    def available(self) -> bool:
+        """Return the availability of the device that provides this sensor data."""
+        return super().available and self._epion_device_id in self.coordinator.data
+
+    @property
+    def device(self) -> dict[str, Any]:
+        """Get the device record from the current coordinator data, or None if there is no data being returned for this device ID anymore."""
+        return self.coordinator.data[self._epion_device_id]
diff --git a/homeassistant/components/epion/strings.json b/homeassistant/components/epion/strings.json
new file mode 100644
index 00000000000..f8ef9de230c
--- /dev/null
+++ b/homeassistant/components/epion/strings.json
@@ -0,0 +1,18 @@
+{
+  "config": {
+    "abort": {
+      "already_configured": "[%key:common::config_flow::abort::already_configured_device%]"
+    },
+    "step": {
+      "user": {
+        "data": {
+          "api_key": "[%key:common::config_flow::data::api_key%]"
+        }
+      }
+    },
+    "error": {
+      "invalid_auth": "[%key:common::config_flow::error::invalid_auth%]",
+      "cannot_connect": "[%key:common::config_flow::error::cannot_connect%]"
+    }
+  }
+}
diff --git a/homeassistant/generated/config_flows.py b/homeassistant/generated/config_flows.py
index c62203b4d6c..752092c02c7 100644
--- a/homeassistant/generated/config_flows.py
+++ b/homeassistant/generated/config_flows.py
@@ -140,6 +140,7 @@ FLOWS = {
         "enocean",
         "enphase_envoy",
         "environment_canada",
+        "epion",
         "epson",
         "escea",
         "esphome",
diff --git a/homeassistant/generated/integrations.json b/homeassistant/generated/integrations.json
index 49527ba6dd0..373853681d7 100644
--- a/homeassistant/generated/integrations.json
+++ b/homeassistant/generated/integrations.json
@@ -1577,6 +1577,12 @@
       "config_flow": false,
       "iot_class": "local_polling"
     },
+    "epion": {
+      "name": "Epion",
+      "integration_type": "hub",
+      "config_flow": true,
+      "iot_class": "cloud_polling"
+    },
     "epson": {
       "name": "Epson",
       "integrations": {
diff --git a/requirements_all.txt b/requirements_all.txt
index 5d0fd2f36d9..5cf4603f373 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -787,6 +787,9 @@ env-canada==0.6.0
 # homeassistant.components.season
 ephem==4.1.5
 
+# homeassistant.components.epion
+epion==0.0.3
+
 # homeassistant.components.epson
 epson-projector==0.5.1
 
diff --git a/requirements_test_all.txt b/requirements_test_all.txt
index 7fbc37f8323..53be88e3f4b 100644
--- a/requirements_test_all.txt
+++ b/requirements_test_all.txt
@@ -638,6 +638,9 @@ env-canada==0.6.0
 # homeassistant.components.season
 ephem==4.1.5
 
+# homeassistant.components.epion
+epion==0.0.3
+
 # homeassistant.components.epson
 epson-projector==0.5.1
 
diff --git a/tests/components/epion/__init__.py b/tests/components/epion/__init__.py
new file mode 100644
index 00000000000..2327d2fa848
--- /dev/null
+++ b/tests/components/epion/__init__.py
@@ -0,0 +1 @@
+"""Tests for the Epion component."""
diff --git a/tests/components/epion/conftest.py b/tests/components/epion/conftest.py
new file mode 100644
index 00000000000..2290d0d4c8f
--- /dev/null
+++ b/tests/components/epion/conftest.py
@@ -0,0 +1,25 @@
+"""Epion tests configuration."""
+
+from unittest.mock import MagicMock, patch
+
+import pytest
+
+from tests.common import load_json_object_fixture
+
+
+@pytest.fixture
+def mock_epion():
+    """Build a fixture for the Epion API that connects successfully and returns one device."""
+    current_one_device_data = load_json_object_fixture(
+        "epion/get_current_one_device.json"
+    )
+    mock_epion_api = MagicMock()
+    with patch(
+        "homeassistant.components.epion.config_flow.Epion",
+        return_value=mock_epion_api,
+    ) as mock_epion_api, patch(
+        "homeassistant.components.epion.Epion",
+        return_value=mock_epion_api,
+    ):
+        mock_epion_api.return_value.get_current.return_value = current_one_device_data
+        yield mock_epion_api
diff --git a/tests/components/epion/fixtures/get_current_one_device.json b/tests/components/epion/fixtures/get_current_one_device.json
new file mode 100644
index 00000000000..4cfeb673bfe
--- /dev/null
+++ b/tests/components/epion/fixtures/get_current_one_device.json
@@ -0,0 +1,15 @@
+{
+  "devices": [
+    {
+      "deviceId": "abc",
+      "deviceName": "Test Device",
+      "co2": 500,
+      "temperature": 12.34,
+      "humidity": 34.56,
+      "pressure": 1010.101,
+      "lastMeasurement": 1705329293171,
+      "fwVersion": "1.2.3"
+    }
+  ],
+  "accountId": "account-dupe-123"
+}
diff --git a/tests/components/epion/test_config_flow.py b/tests/components/epion/test_config_flow.py
new file mode 100644
index 00000000000..50666d52336
--- /dev/null
+++ b/tests/components/epion/test_config_flow.py
@@ -0,0 +1,115 @@
+"""Tests for the Epion config flow."""
+from unittest.mock import MagicMock, patch
+
+from epion import EpionAuthenticationError, EpionConnectionError
+import pytest
+
+from homeassistant import config_entries
+from homeassistant.components.epion.const import DOMAIN
+from homeassistant.const import CONF_API_KEY
+from homeassistant.core import HomeAssistant
+from homeassistant.data_entry_flow import FlowResultType
+
+from tests.common import MockConfigEntry
+
+API_KEY = "test-key-123"
+
+
+async def test_user_flow(hass: HomeAssistant, mock_epion: MagicMock) -> None:
+    """Test we can handle a regular successflow setup flow."""
+
+    result = await hass.config_entries.flow.async_init(
+        DOMAIN, context={"source": config_entries.SOURCE_USER}
+    )
+
+    with patch(
+        "homeassistant.components.epion.async_setup_entry",
+        return_value=True,
+    ) as mock_setup_entry:
+        result = await hass.config_entries.flow.async_configure(
+            result["flow_id"],
+            {CONF_API_KEY: API_KEY},
+        )
+        await hass.async_block_till_done()
+
+    assert result["type"] == FlowResultType.CREATE_ENTRY
+    assert result["title"] == "Epion integration"
+    assert result["data"] == {
+        CONF_API_KEY: API_KEY,
+    }
+    assert len(mock_setup_entry.mock_calls) == 1
+
+
+@pytest.mark.parametrize(
+    ("exception", "error"),
+    [
+        (EpionAuthenticationError("Invalid auth"), "invalid_auth"),
+        (EpionConnectionError("Timeout error"), "cannot_connect"),
+    ],
+)
+async def test_form_exceptions(
+    hass: HomeAssistant, exception: Exception, error: str, mock_epion: MagicMock
+) -> None:
+    """Test we can handle Form exceptions."""
+
+    result = await hass.config_entries.flow.async_init(
+        DOMAIN, context={"source": config_entries.SOURCE_USER}
+    )
+
+    mock_epion.return_value.get_current.side_effect = exception
+    result = await hass.config_entries.flow.async_configure(
+        result["flow_id"],
+        {CONF_API_KEY: API_KEY},
+    )
+
+    assert result["type"] == FlowResultType.FORM
+    assert result["errors"] == {"base": error}
+
+    mock_epion.return_value.get_current.side_effect = None
+
+    with patch(
+        "homeassistant.components.epion.async_setup_entry",
+        return_value=True,
+    ) as mock_setup_entry:
+        result = await hass.config_entries.flow.async_configure(
+            result["flow_id"],
+            {CONF_API_KEY: API_KEY},
+        )
+        await hass.async_block_till_done()
+
+    assert result["type"] == FlowResultType.CREATE_ENTRY
+    assert result["title"] == "Epion integration"
+    assert result["data"] == {
+        CONF_API_KEY: API_KEY,
+    }
+    assert len(mock_setup_entry.mock_calls) == 1
+
+
+async def test_duplicate_entry(hass: HomeAssistant, mock_epion: MagicMock) -> None:
+    """Test duplicate setup handling."""
+    entry = MockConfigEntry(
+        domain=DOMAIN,
+        data={
+            CONF_API_KEY: API_KEY,
+        },
+        unique_id="account-dupe-123",
+    )
+    entry.add_to_hass(hass)
+
+    result = await hass.config_entries.flow.async_init(
+        DOMAIN, context={"source": config_entries.SOURCE_USER}
+    )
+
+    with patch(
+        "homeassistant.components.epion.async_setup_entry",
+        return_value=True,
+    ) as mock_setup_entry:
+        result = await hass.config_entries.flow.async_configure(
+            result["flow_id"],
+            {CONF_API_KEY: API_KEY},
+        )
+        await hass.async_block_till_done()
+
+    assert result["type"] == FlowResultType.ABORT
+    assert result["reason"] == "already_configured"
+    assert mock_setup_entry.call_count == 0