Ecobee Smart Thermostat Essential vs Honeywell Home T9 Smart Thermostat

Honeywell Home T9 Smart Thermostat, thanks to its included occupancy-detecting Smart Room Sensor, humidity sensing at the sensors, SmartThings support, voice control with a speaker and system health monitoring. Ecobee Smart Thermostat Essential wins on price, Bluetooth, Home Assistant support and its 3 year warranty.

Honeywell Home T9 Smart Thermostat includes a Smart Room Sensor that works up to 200 ft away, reads temperature and humidity and detects occupancy, so you can prioritise rooms or average them. Ecobee Smart Thermostat Essential also ships with a sensor and selects by presence, but its main unit lacks occupancy detection.

Ecobee Smart Thermostat Essential, with a 4 inch colour touchscreen at 540 x 540 showing temperature, time and weather, waking as you approach. Honeywell Home T9 Smart Thermostat has a monochrome touchscreen that also shows time and weather but without colour.

Honeywell Home T9 Smart Thermostat adds SmartThings to Alexa, Google Assistant and Apple HomeKit, and has on-device voice control through a built-in speaker. Ecobee Smart Thermostat Essential covers Apple HomeKit, Google Home, Alexa and Home Assistant. Neither supports Matter.

Ecobee Smart Thermostat Essential carries a 3 year warranty but includes no trim plate. Honeywell Home T9 Smart Thermostat has a 2 year warranty, includes a C wire power adapter and often reuses the existing wall plate when replacing an older Honeywell unit.

Buyers who want a colour touchscreen, Home Assistant support, Bluetooth setup and a longer warranty at a lower price, in a home where presence-based sensing is enough. For occupancy detection in each room and HVAC maintenance reminders, Honeywell Home T9 Smart Thermostat is the stronger option.