Documentation for a new integration for air-Q devices (air quality sensors) (#23809)

Co-authored-by: Daniel Lehmann <43613560+dl2080@users.noreply.github.com>
Co-authored-by: Christian Heimke <christian.heimke@loumaris.com>

source/_integrations/airq.markdown

@@ -0,0 +1,67 @@
+---
+title: "air-Q"
+description: "Instructions on how to integrate air-Q into Home Assistant"
+ha_category:
+  - Environment
+  - Health
+  - Sensor
+ha_release: '2022.12'
+ha_iot_class: "Local Polling"
+ha_codeowners:
+  - "@dl2080"
+  - "@Sibgatulin"
+ha_domain: airq
+ha_config_flow: true
+ha_platforms:
+  - sensor
+ha_integration_type: integration
+---
+
+This integration allows integrating the sensors, provided by your [air-Q](https://www.air-q.com/) device, into Home Assistant.
+
+{% include integrations/config_flow.md %}
+
+During the configuration, the user is prompted for the IP address of the device or the first 5 characters of the serial number, as well as the device password.
+
+For this integration to communicate with the device, both must be connected to the same Wi-Fi network.
+
+## Sensors
+
+Currently, the integration supports the following sensors:
+
+| Sensor name          | Unit of measurement |
+|----------------------|---------------------|
+| Ammonia              | µg/m³               |
+| Chlorine             | µg/m³               |
+| CO                   | mg/m³               |
+| CO2                  | ppm                 |
+| Dew Point            | °C                  |
+| Ethanol              | µg/m³               |
+| Formaldehyde         | µg/m³               |
+| H2S                  | µg/m³               |
+| Health Index         | %                   |
+| Humidity (relative)  | %                   |
+| Absolute Humidity    | g/m³                |
+| Hydrogen             | µg/m³               |
+| Methane              | %                   |
+| N2O                  | µg/m³               |
+| NO                   | µg/m³               |
+| NO2                  | µg/m³               |
+| Ozone                | µg/m³               |
+| Oxygen               | µg/m³               |
+| Performance Index    | %                   |
+| PM1, PM25, PM10[^pm] | µg/m³               |
+| Pressure             | hPa                 |
+| Relative Pressure    | hPa                 |
+| Propane              | %                   |
+| SO2                  | µg/m³               |
+| Noise                | dBa                 |
+| Noise (Maxumum)      | dBa                 |
+| Radon                | Bq/m³               |
+| Temperature          | °C                  |
+| VOC                  | ppb                 |
+| VOC (Industrial)     | ppb                 |
+
+PM1, PM25, and PM10 correspond to concentrations of particulates with diameter less than 1µm, 2.5µm, and 10µm respectively
+
+After the setup, separate entities will be created for each of the aforementioned sensors, found in your device.