Nest Thermostat vs Honeywell Home T9 Smart Thermostat

Honeywell Home T9 Smart Thermostat, thanks to its included occupancy-detecting Smart Room Sensor, humidity sensing across rooms, HVAC health monitoring, built-in speaker with voice control and a 2 year warranty. Nest Thermostat wins on price and on its dual-band Wi-Fi and colour display.

Honeywell Home T9 Smart Thermostat, using Smart Room Sensors up to 200 ft away that detect which rooms are occupied so the system heats where people are. Nest Thermostat supports no external sensors, so it only knows the temperature at the hallway wall.

Nest Thermostat measures temperature, humidity, occupancy, proximity and ambient light, using the light sensor to correct for sun falling on the display. Honeywell Home T9 Smart Thermostat measures temperature and humidity, with occupancy coming from its room sensors.

Nest Thermostat is managed only through the Google Home app with guided schedule setup and an eco mode driven by phone location, and it does not learn. Honeywell Home T9 Smart Thermostat uses the Resideo app with manual scheduling and geofenced Auto Home and Away, though owners criticise that app.

No. Neither Honeywell Home T9 Smart Thermostat nor Nest Thermostat supports Matter. Both do work natively with Alexa, Google and Apple HomeKit, and the Honeywell adds SmartThings while the Nest adds SmartThings and IFTTT.

Buyers who want the cheapest good-looking smart thermostat with occupancy-based eco mode, HomeKit compatibility and quick installation, in a home that heats evenly. If any room runs hot or cold, Honeywell Home T9 Smart Thermostat and its room sensors solve a problem the Nest cannot.