Best AQI Monitor for Home (2026)
Three monitors tested for accuracy, ease of use, and value. Our top pick measures seven parameters including radon.
#1 Best Overall: Airthings View Plus
~$299 | View on Amazon
The Airthings View Plus is the most complete indoor AQI monitor available for home use. It measures seven parameters on a single e-ink display with no subscription required.
The radon measurement sets it apart from most home monitors. Radon is the second leading cause of lung cancer in the US and is invisible and odorless. Most other home monitors do not measure it at all.
What It Measures
- PM2.5 and PM10
- Radon
- CO2
- VOCs (volatile organic compounds)
- Humidity
- Temperature
Pros
- Only consumer device that reliably measures both radon and PM2.5 together
- No subscription required — all data in the free app
- Clear e-ink display shows all readings at a glance without a phone
Cons
- More expensive than most home monitors at ~$299
- Radon readings need 24 hours to stabilize for accurate daily average
#2 Runner-Up: Awair Element
~$149
The Awair Element is the most app-forward AQI monitor in this category. It has a clean LED display, a well-designed iOS and Android app, and strong integrations with Apple HomeKit and Amazon Alexa.
What It Measures
- PM2.5
- VOCs
- CO2
- Humidity
- Temperature
Pros
- Excellent app with trend data, alerts, and recommendations
- Good smart home integrations (HomeKit, Alexa, IFTTT)
- Attractive design suitable for any room
Cons
- Does not measure radon
- PM sensor is not laser-based — slightly less precise at very low concentrations
#3 Budget Pick: IQAir AirVisual Pro
~$269
The IQAir AirVisual Pro is popular in wildfire-prone regions because it displays both indoor and outdoor AQI on the same color screen, using IQAir's global network for the outdoor reading and its own indoor sensor for real-time indoor data.
What It Measures
- PM2.5 (indoor, laser sensor)
- CO2
- Temperature and humidity
- Outdoor AQI (via IQAir network — internet required)
Pros
- Side-by-side indoor vs outdoor AQI display — unique feature
- Laser PM2.5 sensor is highly accurate for PM
- AirVisual app is excellent for historical data and forecasting
Cons
- Does not measure radon or VOCs
- Requires internet connection for outdoor AQI data
Monitor Comparison
| Monitor | PM2.5 | Radon | CO2 | VOC | Price |
|---|---|---|---|---|---|
| Airthings View Plus | Yes | Yes | Yes | Yes | ~$299 |
| Awair Element | Yes | No | Yes | Yes | ~$149 |
| IQAir AirVisual Pro | Yes (laser) | No | Yes | No | ~$269 |
Frequently Asked Questions
Do I need a separate AQI monitor if I have an air purifier with built-in sensors?
Built-in sensors in air purifiers typically measure only one or two parameters, often PM2.5 or basic VOC levels, using low-cost optical sensors that are less accurate than dedicated monitors. A dedicated AQI monitor gives you radon, CO2, humidity, and multiple pollutant readings on a single display with better accuracy. If you want actionable data, a standalone monitor is worth the investment.
What is PM2.5 and why should I measure it?
PM2.5 refers to fine particles smaller than 2.5 microns in diameter. They are small enough to pass deep into the lungs and cross into the bloodstream. Long-term PM2.5 exposure is linked to heart disease, stroke, lung cancer, and reduced lung function. Measuring it tells you whether your air purifier is working and whether indoor activities like cooking are causing spikes.
How accurate are home AQI monitors?
Consumer-grade home monitors use optical particle counters which are less precise than regulatory-grade instruments. Top brands like Airthings and Awair have validated their sensors against reference instruments and publish accuracy data. Radon measurements from consumer devices are accurate to within about 10-20% when averaged over 24 hours. PM2.5 sensors can drift over time and may read differently in high-humidity conditions. For regulatory accuracy, you need professional-grade equipment, but consumer monitors are more than sufficient for daily home decisions.
Should I place my monitor near windows or away from them?
Place your monitor away from windows, doors, and HVAC vents. These locations create artificial readings that do not represent the air quality where you actually spend time. The best location is in the room where you spend the most time, at breathing height (roughly 3-5 feet off the floor), away from direct airflow sources and direct sunlight. Avoid placing it directly near cooking areas unless you specifically want to monitor cooking emissions.