Description
The Honeywell T9 Smart Thermostat gives homeowners app and voice control, geofencing, and a bright color touchscreen so comfort can follow them instead of being stuck at the wall. It’s built to work with optional smart room sensors and most standard 24-volt systems, so contractors can offer whole-home smart control without a complicated control upgrade.
Key Features & Benefits
Whole-Home Room Prioritization
Works with optional Honeywell Smart Room Sensors that read temperature, humidity, and occupancy so the thermostat can focus on the rooms people are actually using, or average multiple rooms for “just right” comfort across the home.
Wi-Fi App, Voice, And Geofencing Control
Connects to Wi-Fi so users can change settings from the Honeywell Home app, use geofencing to save energy when they leave, and control the stat with Alexa, Google Assistant, SmartThings, and other smart-home platforms.
Color Touchscreen That’s Easy To Read
Color graphical LCD touchscreen with simple on-screen prompts makes it easy for homeowners to see temperature, humidity, and system status at a glance and change settings without digging through menus.
Long-Range Sensor Link And Smart Response
Uses a dedicated 900 MHz link to talk to smart room sensors up to about 200 feet away (in typical homes) and Smart Response algorithms that learn the home’s heat/cool times so the temperature is at setpoint when the schedule says it should be.
Energy Star Certified With Built-In Alerts
ENERGY STAR® certified with 7-day scheduling, filter-change reminders, extreme-temperature alerts, and support for many utility reward programs, helping homeowners trim run time and qualify for rebates where available.
Specifications
Stages (Max – Family Spec): Up to 3 Heat / 2 Cool total system stages (heat pump or multi-stage conventional)
Modes Of Operation: Heat, Cool, Auto, Off, Emergency Heat (for configured heat pump systems)
Fan Modes: On, Auto, Circulate
Line-Voltage / Millivolt: Not compatible with 120–240 V baseboard or millivolt systems
Program Type: 7-day programmable (up to 4 periods per day) with option to use holds instead of schedules
Geofencing: Yes – app-based home/away geofencing supported
Smart Features:
- Smart Response (learning heat/cool times)
- Filter-change reminders
- Temperature alerts
- Utility reward/energy-savings program support
Room Sensors: Compatible with Honeywell T9/T10 Smart Room Sensors (sold separately) for temperature, humidity, and occupancy; up to 20 sensors supported
Smart-Home Integration:
- Works with Amazon Alexa
- Google Assistant
- Samsung SmartThings and other common ecosystems
- Supports utility/energy program integrations where offered
Control Voltage: 24 VAC (low voltage)
Power Type: C-wire required; includes power adapter (C-wire adapter) for systems without an existing C-wire
Electrical Ratings:
- 20–30 VAC
- Up to 1.0 A running current per W/W2/Y/Y2 output
- Lower current on fan and O/B outputs
Temperature Control Range: Heat 40–90°F (4.5–32°C); Cool 50–99°F (10–37°C)
Operating Ambient Temperature: 32–120°F (0–48.9°C)
Operating Humidity: 5–90% RH, non-condensing
Dimensions: 4.92″ × 3.7″ × 0.94″
