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Air Quality Monitors · Head to head

Airthings 325 Corentium Home 2 vs Ecobee Smart Thermostat Premium

Full Smart Air Quality Monitors comparison in 2026

Updated September 2026
Data from Amazon and official Airthings and Ecobee sites.
2026 verdict
On the scoreboard the Ecobee Smart Thermostat Premium beats the Airthings 325 Corentium Home 2 across connectivity, integrations, sensors and alerts, exactly what you would expect from a dual-band Wi-Fi thermostat that watches VOCs, CO2, temperature, humidity and occupancy while commanding your HVAC from a 4-inch color touchscreen, with every platform from HomeKit to IFTTT on board. The Airthings holds two cards the Ecobee cannot match: a 5-year warranty versus 3, and radon detection itself, delivered by a battery-powered monitor that works in any basement or bedroom. These devices solve different problems and coexist happily. Rated head to head, the Ecobee Smart Thermostat Premium is the more capable machine; for the radon question specifically, the Corentium Home 2 is the only one with an answer.
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FeatureAirthings 325 Corentium Home 2Ecobee Smart Thermostat PremiumWinner
Price$179.99$149.63Ecobee Smart Thermostat Premium
Warranty5 years3 yearsAirthings 325 Corentium Home 2
ConnectivityBluetooth, Other2.4 GHz WiFi, 5 GHz WiFi, BluetoothEcobee Smart Thermostat Premium
IntegrationsGoogle Home, Alexa, Home AssistantGoogle Home, Alexa, Apple HomeKit, Samsung SmartThings, Home AssistantEcobee Smart Thermostat Premium
SensorsRadon, Temperature, HumidityTVOC, CO2, Temperature, Humidity, OccupancyEcobee Smart Thermostat Premium
Rating4.54.5Tie
Weather ResistanceNONOTie
ScreenYESYESTie
AlertsAir Quality AlertsTemperature Alerts, Air Quality AlertsTie

Frequently Asked Questions

Which is better overall: Airthings 325 Corentium Home 2 or Ecobee Smart Thermostat Premium?

Ecobee Smart Thermostat Premium wins the spec battle with Wi-Fi connectivity, six-platform smart home support, five sensors including CO2 and VOCs, richer alerts and a color touchscreen. Airthings 325 Corentium Home 2 keeps the longer 5-year warranty and is the only one of the two that can measure radon.

What is the biggest difference between Airthings 325 Corentium Home 2 and Ecobee Smart Thermostat Premium?

Purpose and placement. The Ecobee is wired into your wall, replaces your thermostat and monitors VOCs, CO2, occupancy, temperature and humidity while controlling heating and cooling. The Airthings is a portable, battery-powered radon monitor with temperature and humidity that goes wherever radon collects.

Can the Ecobee Smart Thermostat Premium measure radon?

No. Its air quality suite covers VOCs, CO2, temperature, humidity and occupancy, with alerts when air quality is poor. Radon detection requires a dedicated device like the Airthings 325 Corentium Home 2, which shows rolling radon averages on its built-in LCD.

Which works with more smart home platforms?

The Ecobee Smart Thermostat Premium, supporting Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant and IFTTT. The Airthings 325 Corentium Home 2 covers Google Home, Alexa, Home Assistant and IFTTT, without HomeKit or SmartThings.

Who should buy Airthings 325 Corentium Home 2?

Choose Airthings 325 Corentium Home 2 if you need continuous radon monitoring with simple Good, Fair or Poor readings, battery-powered placement flexibility and a 5-year warranty. It answers a question no thermostat can.

Who should buy Ecobee Smart Thermostat Premium?

Choose Ecobee Smart Thermostat Premium if you want a thermostat upgrade that also watches VOCs, CO2 and occupancy, shows everything on a premium touchscreen, automates your HVAC and connects to essentially every smart home platform.

Full comparison table

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