Question 1

Which is better, ecobee Smart Thermostat Premium or Honeywell Home T9 Smart Thermostat?

Accepted Answer

Based on our testing, the ecobee Smart Thermostat Premium scores higher overall at 8.8/10. The ecobee Smart Thermostat Premium scored 8.8/10 and the Honeywell Home T9 Smart Thermostat scored 8.1/10 in our Best Thermostats for Old Houses 2026 evaluation.

Question 2

Is the ecobee Smart Thermostat Premium worth it over the Honeywell Home T9 Smart Thermostat?

Accepted Answer

The ecobee Smart Thermostat Premium scores 8.8/10 while the Honeywell Home T9 Smart Thermostat scores 8.1/10. The ecobee Smart Thermostat Premium is our "Best Overall" pick in the Best Thermostats for Old Houses 2026 category.

ecobee Smart Thermostat Premium vs Honeywell Home T9 Smart Thermostat: Which to Buy?