10 Best Indoor Air Quality Monitors 2025 in the United States

The Airthings 2960 View Plus is a solid choice for those looking to monitor indoor air quality, especially when it comes to detecting radon—a significant health risk. Its range of sensors allows it to measure various pollutants, including PM2.5, CO2, and VOCs, making it a comprehensive tool for understanding air health in your home. The WiFi connectivity lets you check your air quality in real-time via the Airthings app, which provides valuable notifications and historical data analysis.

One of the standout features is its accuracy, particularly for radon detection, which is crucial since radon is linked to lung cancer. The device is also battery-powered, granting you the flexibility to place it wherever needed without worrying about cords. Its eInk display is user-friendly and customizable, making it easy to monitor your air quality at a glance.

There are a few drawbacks to consider. The requirement for an app and internet access may be a hurdle for users who prefer simpler devices. Some users have noted that the accuracy for other measurements can vary, and while it has a good customer rating, a small percentage of users reported connectivity issues with the app. Additionally, the reliance on batteries means that you'll need to replace them approximately every two years, which could be an inconvenience for some.

The Airthings 2960 View Plus is particularly suitable for health-conscious individuals or families wanting to improve their indoor air quality, but it may not be the best fit for those looking for a straightforward, battery-free solution.

The Amazon Smart Air Quality Monitor is designed to help you keep track of your indoor air quality by measuring five key factors: particulate matter (PM 2.5), volatile organic compounds (VOCs), carbon monoxide (CO), humidity, and temperature. One of its strengths lies in its accurate sensors, which provide reliable data on air quality. The color-coded LED indicator gives a quick visual representation of air quality, and detailed scores can be viewed through the Alexa app.

This is particularly user-friendly for those already using Alexa-enabled devices, as it integrates seamlessly into the Amazon ecosystem. The device can also send notifications to your phone or announce on Echo devices if poor air quality is detected, which is a handy feature for proactive monitoring. Additionally, it supports routines to automate your air purifiers, dehumidifiers, and fans based on air quality changes, enhancing your home's comfort.

However, the accuracy for some measurements, like VOCs and PM 2.5, can vary, and it only covers typical indoor ranges (15°C to 30°C for temperature and 30% to 70% for humidity). The device is compact and portable, weighing just 120 grams, and is powered by a standard 5V micro-USB adapter, making it easy to place anywhere indoors. The setup is straightforward, especially for non-experts, thanks to its 'Certified for Humans' label. One downside is its reliance on a 2.4GHz Wi-Fi connection, which might be less desirable for those with dual-band routers. This monitor is best suited for users who want a simple, integrated way to keep an eye on their indoor air quality, especially if they are already part of the Alexa ecosystem.

The Airthings 325 Corentium Home 2 is a solid choice if you want to keep an eye on radon gas levels in your home, which is important for long-term health safety. It uses proven radon sensing technology trusted by professionals to provide accurate, continuous monitoring without needing lab tests. The addition of Bluetooth means you can easily connect it to your smartphone or tablet to view radon levels along with temperature and humidity data, helping you understand your indoor air environment better. The device is compact and lightweight, powered by included AA batteries, so it's portable and easy to place in different rooms without hassle.

One of its best features is the app that visually tracks radon fluctuations over time and offers personalized advice, making it easier to take action if levels rise. It also provides visual alerts directly on the device, so you’re quickly notified if radon reaches concerning levels. However, this monitor focuses solely on radon, temperature, and humidity, so it won't detect other common indoor pollutants like CO2 or VOCs if you need broader air quality monitoring.

The unit is rated to operate well within normal home temperature and humidity ranges, but extreme conditions might affect its performance. Since it runs on batteries, you’ll need to replace them periodically, but the low power usage should keep that infrequent. The size is small and discreet, which is great for home use without being obtrusive. If your main goal is reliable, easy radon detection with helpful data you can track on your phone, this device fits the bill nicely. For those wanting a multi-pollutant indoor air quality monitor, you might want to look elsewhere. But for focused radon awareness and peace of mind, the Airthings 325 Corentium Home 2 is a practical and user-friendly option.