Updated October 2026
Data from the official Apollo Automation and Ecobee sites.
2026 verdict
Ecobee Smart Thermostat Premium edges out Apollo MSR-2 with CO2 in 2026, led by connectivity, screen, and integrations.
It has the clearer edge on connectivity, screen, and integrations, and it stays ahead on its broader overall balance. Apollo MSR-2 with CO2 is still relevant if you care most about price and sensors, but Ecobee Smart Thermostat Premium is the stronger recommendation overall. Overall, Ecobee Smart Thermostat Premium makes more sense for most people.
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- Wi-Fi 2.4 GHz
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| Feature | Apollo MSR-2 with CO2 | Ecobee Smart Thermostat Premium | Winner |
|---|---|---|---|
| Price | $56.09 | $239.91 | Apollo MSR-2 with CO2 |
| Connectivity | 2.4 GHz WiFi | 2.4 GHz WiFi, 5 GHz WiFi, Bluetooth | Ecobee Smart Thermostat Premium |
| Screen | NO | YES | Ecobee Smart Thermostat Premium |
| Integrations | Home Assistant | Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant | Ecobee Smart Thermostat Premium |
| Sensors | CO2, Temperature, Atmospheric Pressure, Ambient Light, UV, Occupancy | TVOC, CO2, Temperature, Humidity, Occupancy | Apollo MSR-2 with CO2 |
| Weather Resistance | NO | NO | Tie |
| Alerts | Temperature Alerts, Air Quality Alerts | Temperature Alerts, Air Quality Alerts | Tie |
| Local Control | YES | YES | Tie |
$56.09
- + Price: $56.09
- + Sensors: CO2, Temperature, Atmospheric Pressure, Ambient Light, UV, Occupancy
- - Connectivity: 2.4 GHz WiFi vs 2.4 GHz WiFi, 5 GHz WiFi, Bluetooth
- - Screen: NO vs YES
Winner
8% OFF
$239.91
$259.99
- + Connectivity: 2.4 GHz WiFi, 5 GHz WiFi, Bluetooth
- + Screen: YES
- + Integrations: Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant
- - Price: $239.91 vs $56.09
- - Sensors: TVOC, CO2, Temperature, Humidity, Occupancy vs CO2, Temperature, Atmospheric Pressure, Ambient Light, UV, Occupancy
Frequently Asked Questions
Which is better overall: Apollo MSR-2 with CO2 or Ecobee Smart Thermostat Premium?
Ecobee Smart Thermostat Premium has the stronger overall profile in this comparison, especially for connectivity, screen, and integrations.
What is the biggest difference between Apollo MSR-2 with CO2 and Ecobee Smart Thermostat Premium?
Price is one of the clearest differences: Apollo MSR-2 with CO2 lists $56.09, while Ecobee Smart Thermostat Premium lists $239.91.
Which one looks better on price?
Apollo MSR-2 with CO2 is listed at $56.09, while Ecobee Smart Thermostat Premium is listed at $239.91. Apollo MSR-2 with CO2 (better spec).
Who should buy Apollo MSR-2 with CO2?
Choose Apollo MSR-2 with CO2 if your priority is price and sensors and that matters more than connectivity.
Who should buy Ecobee Smart Thermostat Premium?
Choose Ecobee Smart Thermostat Premium if your priority is connectivity and screen and that matters more than price.
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