diff --git a/homeassistant/components/vallox/__init__.py b/homeassistant/components/vallox/__init__.py
index 6a2234af9e6..1a1788aeeed 100644
--- a/homeassistant/components/vallox/__init__.py
+++ b/homeassistant/components/vallox/__init__.py
@@ -63,6 +63,7 @@ PLATFORMS: list[str] = [
     Platform.SENSOR,
     Platform.FAN,
     Platform.BINARY_SENSOR,
+    Platform.SWITCH,
 ]
 
 ATTR_PROFILE_FAN_SPEED = "fan_speed"
diff --git a/homeassistant/components/vallox/switch.py b/homeassistant/components/vallox/switch.py
new file mode 100644
index 00000000000..4c8116ebd27
--- /dev/null
+++ b/homeassistant/components/vallox/switch.py
@@ -0,0 +1,105 @@
+"""Support for Vallox ventilation unit switches."""
+from __future__ import annotations
+
+from dataclasses import dataclass
+from typing import Any
+
+from vallox_websocket_api import Vallox
+
+from homeassistant.components.switch import SwitchEntity, SwitchEntityDescription
+from homeassistant.config_entries import ConfigEntry
+from homeassistant.core import HomeAssistant
+from homeassistant.helpers.entity import EntityCategory
+from homeassistant.helpers.entity_platform import AddEntitiesCallback
+
+from . import ValloxDataUpdateCoordinator, ValloxEntity
+from .const import DOMAIN
+
+
+class ValloxSwitchEntity(ValloxEntity, SwitchEntity):
+    """Representation of a Vallox switch."""
+
+    entity_description: ValloxSwitchEntityDescription
+    _attr_entity_category = EntityCategory.CONFIG
+    _attr_has_entity_name = True
+
+    def __init__(
+        self,
+        name: str,
+        coordinator: ValloxDataUpdateCoordinator,
+        description: ValloxSwitchEntityDescription,
+        client: Vallox,
+    ) -> None:
+        """Initialize the Vallox switch."""
+        super().__init__(name, coordinator)
+
+        self.entity_description = description
+
+        self._attr_unique_id = f"{self._device_uuid}-{description.key}"
+        self._client = client
+
+    @property
+    def is_on(self) -> bool | None:
+        """Return true if the switch is on."""
+        if (
+            value := self.coordinator.data.get_metric(
+                self.entity_description.metric_key
+            )
+        ) is None:
+            return None
+        return value == 1
+
+    async def async_turn_on(self, **kwargs: Any) -> None:
+        """Turn on."""
+        await self._set_value(True)
+
+    async def async_turn_off(self, **kwargs: Any) -> None:
+        """Turn off."""
+        await self._set_value(False)
+
+    async def _set_value(self, value: bool) -> None:
+        """Update the current value."""
+        metric_key = self.entity_description.metric_key
+        await self._client.set_values({metric_key: 1 if value else 0})
+        await self.coordinator.async_request_refresh()
+
+
+@dataclass
+class ValloxMetricKeyMixin:
+    """Dataclass to allow defining metric_key without a default value."""
+
+    metric_key: str
+
+
+@dataclass
+class ValloxSwitchEntityDescription(SwitchEntityDescription, ValloxMetricKeyMixin):
+    """Describes Vallox switch entity."""
+
+
+SWITCH_ENTITIES: tuple[ValloxSwitchEntityDescription, ...] = (
+    ValloxSwitchEntityDescription(
+        key="bypass_locked",
+        name="Bypass locked",
+        icon="mdi:arrow-horizontal-lock",
+        metric_key="A_CYC_BYPASS_LOCKED",
+    ),
+)
+
+
+async def async_setup_entry(
+    hass: HomeAssistant,
+    entry: ConfigEntry,
+    async_add_entities: AddEntitiesCallback,
+) -> None:
+    """Set up the switches."""
+
+    data = hass.data[DOMAIN][entry.entry_id]
+    client = data["client"]
+    client.set_settable_address("A_CYC_BYPASS_LOCKED", int)
+
+    async_add_entities(
+        [
+            ValloxSwitchEntity(data["name"], data["coordinator"], description, client)
+            for description in SWITCH_ENTITIES
+        ]
+    )
diff --git a/tests/components/vallox/conftest.py b/tests/components/vallox/conftest.py
index ef9fd2a0e4b..0c14f359b5f 100644
--- a/tests/components/vallox/conftest.py
+++ b/tests/components/vallox/conftest.py
@@ -39,6 +39,11 @@ def patch_metrics(metrics: dict[str, Any]):
     )
 
 
+def patch_metrics_set():
+    """Patch the Vallox metrics set values."""
+    return patch("homeassistant.components.vallox.Vallox.set_values")
+
+
 @pytest.fixture(autouse=True)
 def patch_profile_home():
     """Patch the Vallox profile response."""
diff --git a/tests/components/vallox/test_switch.py b/tests/components/vallox/test_switch.py
new file mode 100644
index 00000000000..5a3f0ebd648
--- /dev/null
+++ b/tests/components/vallox/test_switch.py
@@ -0,0 +1,68 @@
+"""Tests for Vallox switch platform."""
+import pytest
+
+from homeassistant.components.switch.const import DOMAIN as SWITCH_DOMAIN
+from homeassistant.const import ATTR_ENTITY_ID, SERVICE_TURN_OFF, SERVICE_TURN_ON
+from homeassistant.core import HomeAssistant
+
+from .conftest import patch_metrics, patch_metrics_set
+
+from tests.common import MockConfigEntry
+
+
+@pytest.mark.parametrize(
+    "entity_id, metric_key, value, expected_state",
+    [
+        ("switch.vallox_bypass_locked", "A_CYC_BYPASS_LOCKED", 1, "on"),
+        ("switch.vallox_bypass_locked", "A_CYC_BYPASS_LOCKED", 0, "off"),
+    ],
+)
+async def test_switch_entities(
+    entity_id: str,
+    metric_key: str,
+    value: int,
+    expected_state: str,
+    mock_entry: MockConfigEntry,
+    hass: HomeAssistant,
+) -> None:
+    """Test switch entities."""
+    # Arrange
+    metrics = {metric_key: value}
+
+    # Act
+    with patch_metrics(metrics=metrics):
+        await hass.config_entries.async_setup(mock_entry.entry_id)
+        await hass.async_block_till_done()
+
+    # Assert
+    sensor = hass.states.get(entity_id)
+    assert sensor
+    assert sensor.state == expected_state
+
+
+@pytest.mark.parametrize(
+    "service, metric_key, value",
+    [
+        (SERVICE_TURN_ON, "A_CYC_BYPASS_LOCKED", 1),
+        (SERVICE_TURN_OFF, "A_CYC_BYPASS_LOCKED", 0),
+    ],
+)
+async def test_bypass_lock_switch_entitity_set(
+    service: str,
+    metric_key: str,
+    value: int,
+    mock_entry: MockConfigEntry,
+    hass: HomeAssistant,
+) -> None:
+    """Test bypass lock switch set."""
+    # Act
+    with patch_metrics(metrics={}), patch_metrics_set() as metrics_set:
+        await hass.config_entries.async_setup(mock_entry.entry_id)
+        await hass.async_block_till_done()
+        await hass.services.async_call(
+            SWITCH_DOMAIN,
+            service,
+            service_data={ATTR_ENTITY_ID: "switch.vallox_bypass_locked"},
+        )
+        await hass.async_block_till_done()
+        metrics_set.assert_called_once_with({metric_key: value})