Knowledge Base

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How air quality data contributors and sources are credited on the IQAir website and app?

IQAir is able to provide the world's largest database of global air...

Why are some data contributors "anonymous"?

On the IQAir platform, all ground-based stations are attributed to ...

How is air quality data validated before publishing on the AirVisual platform?

The AirVisual platform aims to centralise and aggregate as much air...

IQAir implements 2024 update to U.S. EPA Air Quality Index (AQI)

Download or export your AirVisual device's data

Access AirVisual's AQI, Air quality and pollution API

In order to offer the most value possible through our ever-growing ...

How often should I run my system and at what speed?

At IQAir, we believe that people should breathe the cleanest air po...

How can I access historical data on the IQAir platform?

A range of historical air quality data is freely available on the I...

How does the Live Major Cities Ranking work?

The live Major Cities Ranking [https://www.iqair.com/INTL/world-ai...

What are the photos on station screen and how do I make use of it?

IQAir values every contributor and aims to provide our users with t...

What is the difference in an AirVisual Outdoor, Purple Air and Clarity Node-S?

These are three low-cost sensors that are supported on the AirVisua...

Why does the AirVisual Pro monitor PM2.5 and CO2?

The AirVisual Pro, with it's large screen display, was designed to ...

AirVisual Pro maintenance and sensor recalibration

The AirVisual Pro is an industry-grade air pollution monitor [http:...

What is PM2.5?

What is PM2.5? Particulate Matter, abbreviated as PM, is a term use...

Will AirVisual Outdoor sensors communicate effectively if the location is made of concrete or cinderblock?

Yes, the communication of our sensors are based on it's internet co...

How to download the raw data from your IQAir device/sensor?

By logging on to iqair.com and using the web dashboard, raw data fo...

What does the asterisk (*) mean on some locations' AQI?

Whilst the world's coverage of ground-based air monitoring stations...

My PM2.5 sensor has got 'stuck' on a very high number

Due to the function of the AirVisual air monitor's PM2.5 sensor, to...

How to provide public air quality data with AirVisual Outdoor

With your AirVisual Outdoor air quality monitor, outdoor air qualit...

How can I access air pollution data through AirVisual's air quality API?

In order to offer the most value possible through our ever-growing ...

How to connect the AirVisual Pro to Wi-Fi?

To connect the AirVisual Pro to Wi-Fi, you have 2 options: 1- Usi...

How do the PM2.5 sensor and CO2 sensor work?

1. How does the PM2.5 laser sensor work? The AirVisual Node/Pro us...

AirVisual Pro API returned JSON format

To access your monitor's data using your AirVisual Pro's Device API...

My serial number does not exist

If you're trying to add your Pro's serial number in the app or in t...

Where can I find my AirVisual Pro's serial number?

You may be asked for your AirVisual Pro's serial number either when...

How to change the language of your App

The language of the AirVisual app is dependent on the language of t...

How are Hanoi's air quality (AQI) and the major city rankings calculated?

To calculate a city's overall Air Quality Index (AQI) value, AirVis...

How accurate is AirVisual's air quality data?

Why do I see different AQI numbers between IQAir and other platforms?

AirVisual Network Specification

The AirVisual Outdoor has multiple connectivity options that allow ...

How is AQI calculated without all 6 key pollutants?

The Air Quality Index (AQI) is a valuable tool

Why is your air quality index different from other sites?

Our AQI is calculated hourly and updated hourly. Many other website...

How can I access the PM10 measurements from my AirVisual Pro?

The AirVisual Pro's PM2.5 sensor also contains an internal PM10 sen...

Why is the AirVisual Pro's screen reading different to what is shown on the app?

Sometimes, it may be the case that your AirVisual Pro's screen may ...

What is the differences between AirVisual Outdoor and Purpleair?

IQAir manufactures the AirVisual Outdoor and Purpleair manufactures...

AHAM & CADR (FAQ#14)

AHAM & CADR (FAQ#14) AHAM testing is generally flawed. It calls its...

Where is the display screen for the AirVisual Outdoor?

There is no display screen for the AirVisual Outdoor. You can use t...

Outdoor low cost sensor Comparison Chart

[https://iqairna-prod.crm.dynamics.com/api/data/v9.0/msdyn_knowledg...

How are Hanoi's AQI and the city rankings calculated?

A city's overall Air Quality Index (AQI) value is calculated using ...

Cannot register my monitor's serial number

If you receive an error message when trying to enter your serial nu...

How can I check the data source of a station?

The air quality data reported through the AirVisual platform comes ...

Which Atem Series filter is better: Atem Desk or Atem Car?

Both Atem HEPA replacement filters contain the same particle filtra...

How do low-cost sensor owners contribute data and publish a contributor profile?

As an owner or operator of a low-cost air quality sensor, also call...

No nearby location / the app assumes wrong location

If location services are allowed on the AirVisual app, the app will...

How to show AirGradient stations and profiles on the IQAir map

How to claim your PurpleAir sensor

PurpleAir sensors are seamlessly integrated into the IQAir platform...

Payment options, shipping and warranty

Payment options Purchasing an AirVisual Node/Pro air quality monito...

What is the air quality index (AQI)?

What are the data sources for this air quality ranking?

The data included in this report is all generated from ground-based...

What is the difference between the US AQI and WHO air quality guidelines?

Aimed to offer guidance in reducing the health impacts of air pollu...

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