Apollo MSR-2 with CO2 vs Ecobee Smart Thermostat Premium

Data from Amazon and official Apollo Automation and Ecobee sites.

2026 verdict

Looking at the full picture in 2026, Ecobee Smart Thermostat Premium gets the edge. 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.

Apollo MSR-2 with CO2

$56.09

Winner

9% OFF

C$329.99

C$300.29

Feature	Apollo MSR-2 with CO2	Ecobee Smart Thermostat Premium	Winner
Price	$56.09	C$300.29	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, IFTTT	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

$56.09

Winner

9% OFF

C$329.99

C$300.29

+ Connectivity: 2.4 GHz Wifi, 5 GHz Wifi, Bluetooth
+ Screen: YES
+ Integrations: Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, IFTTT
- Price: C$300.29 vs $56.09
- Sensors: TVOC, CO2, Temperature, Humidity, Occupancy vs CO2, Temperature, Atmospheric Pressure, Ambient Light, UV, Occupancy

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 C$300.29.
Which one looks better on price?: Apollo MSR-2 with CO2 is listed at $56.09, while Ecobee Smart Thermostat Premium is listed at C$300.29. 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.