Knowledge Base

  1. IQAir air pollution Mask 

    1. How can I choose an effective air pollution mask?
    2. How long can I wear the IQAir Air Pollution Mask before replacing it?
    3. Can the IQAir Air Pollution Mask be cleaned?
    4. How do I choose my IQAir Mask size?
  2. World air quality (AQI) ranking 

    1. Why are some cities and countries not listed in this air quality ranking?
    2. Why is the air quality ranking data different from governmental/official data?
    3. Why is PM2.5 chosen for this ranking?
    4. What are the data sources for this air quality ranking?
    5. How are the yearly PM2.5 yearly measurements for country/region calculated?
  3. The AirVisual Pro/Node 

    1. How can I make my outdoor Node/Pro's data public?
    2. Chinese users: AirVisual Node/Pro常见问题
    3. AirVisual Node/Pro software updates - Changelog
    4. Download the AirVisual Node/Pro's data using Samba
    5. How to access the AirVisual Node/Pro's API
  4. Managing clean and fresh air 

    1. The CO2 levels are high in my bedroom during the night, what should I do?
    2. Is it normal that my humidifier is contributing to a high AQI?
  5. AirVisual App 

    1. Why is my AQI different in the AirVisual app between 2 phones?
    2. What is the red notification on the AirVisual app icon?
    3. My iOS widget doesn't display data
    4. How to remove or move a location/station in the AirVisual app?
    5. Android APK app installation permissions
  6. Air quality data 

    1. Air quality forecast
    2. What is AirVisual Earth and how does it work?
    3. Access AirVisual's AQI, Air quality and pollution API
    4. My city's data is unavailable on the AirVisual map
    5. What determines the major cities ranking?
  7. Legal notice 

    1. Privacy policy
    2. Air quality forecast disclaimer
    3. Credits
  8. All articles 

    1. Air quality forecast
    2. Privacy policy
    3. How can I make my outdoor Node/Pro's data public?
    4. The CO2 levels are high in my bedroom during the night, what should I do?
    5. Why is my AQI different in the AirVisual app between 2 phones?

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