Best Indoor Air Quality Monitors of 2024

To evaluate air quality monitors, we focus on four distinct tests. Our engineers judge how easy monitors are to use, the number of important air quality metrics they analyze, whether they display some kind of overall air quality score, and how useful their screens are for viewing air quality readings. 

Our ease-of-use tests judge how well each monitor’s app works and whether it allows you to easily view historical data. We also do a simple test on the sensors on each monitor to make sure they detect particulate matter, VOCs, temperature, humidity, and carbon dioxide. All of these results are compiled into an Overall Score for each model in our air quality monitor ratings. Note: Consumer Reports does not evaluate the accuracy of the sensors.