
Verified
Smart WiFi thermostat with room sensors and multi-room comfort.
AlexaGoogle HomeHomeKitSmartThings
C-Wire
Compatibility
Platform Compatibility
Alexa
Google Home
HomeKit
SmartThings
Matter
Home Assistant
IFTTT
Connectivity
WiFi (2.4GHz)
Zigbee
Z-Wave
Thread
Bluetooth
Bluetooth LE
Infrared
Specifications
Physical
- Power Source
- C-Wire
- Dimensions
- 119mm × 119mm × 27mm
- Colors
- White
- Indoor/Outdoor
- indoor
Thermostats Specs
- Geofencing
- Yes
- Scheduling
- Yes
- Display Type
- Color LCD Touchscreen
- Sensor Range
- 200
- C Wire Required
- Yes
- Smart Response
- Yes
- Max Room Sensors
- 20
- Humidity Control
- Yes
- Sensor Range Unit
- ft
- Adaptive Recovery
- Yes
- Compatible Systems
- Forced air (gas, oil, electric), Hot water, Steam, Heat pumps
- Energy Star Certified
- Yes
- Room Sensors Supported
- Yes
Features
Energy Monitoring
Scheduling
Voice Control
Timer
Away Mode
Physical Button
LED Indicator
LED Customizable
OTA Updates
Local API
Compact Design
Pros & Cons
Pros
- Room sensors for multi-zone comfort (up to 20)
- Works with all major platforms including HomeKit
- Geofencing and Smart Response learning
- ENERGY STAR certified
Cons
- Requires C-wire (no battery backup option)
- Room sensors sold separately
- Not compatible with baseboard heating
Best For
Large homes with uneven heating/coolingMulti-room temperature controlEnergy-conscious homeowners
Product Details
The Honeywell Home T9 Smart Thermostat takes comfort to the next level with Smart Room Sensors that let you prioritize comfort in specific rooms. With geofencing, Smart Response learning, and compatibility with all major voice assistants, it automatically adjusts to your schedule and preferences to keep your home comfortable while saving energy.
