The AirQ employs an air quality sensor that is capable of detecting levels of TVOC (Total Volatile Organic Compounds) and CO2e (Carbon Dioxide Equivalent) in the air. 

The AirQ gives you all of the smart AC functionality as the Sensibo Sky but 

Yes, the AirQ is available only by subscription. AirQ filters should be replaced every 3 months and clean filters are automatically shipped to your doorstep right on time.

The Sensibo AirQ give you all of the smart AC capabilities of the Sensibo Sky but additionally provides you with live indoor air pollution data and is Apple HomeKit compatible.

Combined with an Air or Sky AC controller, you AC will turn into a smart air purifier. In addition to the medical grade filtration, you will enjoy all the benefits of a smart appliance, including Sensibo's unique PureBoost technology, that automatically activates your AC fan level based on air quality levels.

The Sensibo AirQ filters are designed to allow for ample airflow through your AC, while still catching airborne pollutants. Their custom made semi-permeable material ensures that air passes while the airborne pollutants get trapped. Additionally, to ensure optimal results, the AirQ filters should only cover approximately 30%-50% of your existing filters area.

If your AC properly cools the room, coverage should be 100%. Your AC is equipped with a high efficiency fan that makes sure to circulate all the air in the room. In fact, a typical AC fan circulates the volume of air in your room 6 times an hour.