Add documentation for integration of Vallox ventilation units (#9668)

* Add documentation for integration of Vallox ventilation units.

* Address review comments #1.

* Apply suggestions from code review

Co-Authored-By: Franck Nijhof <frenck@frenck.nl>

* Adapt to changed architecture of parent patch.

* ✏️ Component -> Integration

source/_components/vallox.markdown

@@ -0,0 +1,108 @@
+---
+layout: page
+title: "Vallox Ventilation Units"
+description: "Instructions on how to integrate Vallox ventilation units into Home Assistant."
+date: 2019-06-19 20:00
+sidebar: true
+comments: false
+sharing: true
+footer: true
+ha_category:
+  - Fan
+  - Sensor
+ha_release: 0.96
+ha_iot_class: Local Polling
+---
+
+The `vallox` integration lets you control any Vallox ventilation unit that is supported by the [vallox_websocket_api](https://github.com/yozik04/vallox_websocket_api) (follow the link for a list of supported units).
+
+The **fan** platform of this integration allows you to either turn on/off the complete unit via the toggle switch or select a ventilation profile through the service `vallox/set_profile`. The four standard Vallox profiles are provided:
+
+- `At Home`
+- `Away`
+- `Boost`
+- `Fireplace`
+
+Also, there is a **sensor** platform that exposes a number of relevant metrics like fan speed, various air temperatures and humidity.
+
+### {% linkable_title Configuration %}
+
+```yaml
+vallox:
+  host: IP_ADDRESS
+```
+
+{% configuration %}
+host:
+  description: The IP or hostname of the ventilation unit in your home network.
+  required: true
+  type: string
+name:
+  description: The name of this device as you want to see it in Home Assistant.
+  required: false
+  default: Vallox
+  type: string
+{% endconfiguration %}
+
+## {% linkable_title Profile Switching %}
+
+For convenient switching of ventilation profiles in the GUI, consider using an [input_select](../input_select) hooked to an automation, for example:
+
+{% raw %}
+```yaml
+input_select:
+  ventilation_profile:
+    name: Ventilation profile select
+    options:
+      - "Home"
+      - "Away"
+      - "Boost"
+      - "Fireplace"
+    icon: mdi:fan
+
+automation:
+  - alias: Set Ventilation Profile
+    trigger:
+      platform: state
+      entity_id: input_select.ventilation_profile
+    action:
+      service: vallox.set_profile
+      data_template:
+        profile: "{{ states('input_select.ventilation_profile') }}"
+```
+{% endraw %}
+
+## {% linkable_title Fan Services %}
+
+### {% linkable_title Service `vallox.set_profile` %}
+
+Set the ventilation profile.
+
+| Service data attribute | Optional | Description                                          |
+|------------------------|----------|------------------------------------------------------|
+| `profile`              |       no | Allowed values: `Home`, `Away`, `Boost`, `Fireplace` |
+
+### {% linkable_title Service `vallox.set_profile_fan_speed_home` %}
+
+Set the fan speed of the `Home` profile.
+
+| Service data attribute | Optional | Description                                     |
+|------------------------|----------|-------------------------------------------------|
+| `fan_speed`            |       no | Fan speed in %. `Integer`, between 0 and 100.   |
+
+
+### {% linkable_title Service `vallox.set_profile_fan_speed_away` %}
+
+Set the fan speed of the `Away` profile.
+
+| Service data attribute | Optional | Description                                     |
+|------------------------|----------|-------------------------------------------------|
+| `fan_speed`            |       no | Fan speed in %. `Integer`, between 0 and 100.   |
+
+### {% linkable_title Service `vallox.set_profile_fan_speed_boost` %}
+
+Set the fan speed of the `Boost` profile.
+
+| Service data attribute | Optional | Description                                     |
+|------------------------|----------|-------------------------------------------------|
+| `fan_speed`            |       no | Fan speed in %. `Integer`, between 0 and 100.   |