





Unlock a healthier home with indoor air quality monitoring, including alerts and tips.
Built-in air quality monitor alerts you when air quality is poor and offer tips on how to improve it.
Air filter change reminders make cleaner air a breeze.












Unlock enhanced savings and comfort with eco+, next-level software for the world’s most advanced thermostats.
Automatically turns down your temperature when nobody is home.³
Learns your routine and recommends changes to your thermostat schedule for optimal energy savings.³
Automatically heats or cools your home when electricity is more affordable and cleaner.⁴
Reduces strain on the electricity grid and provides you with incentives from your energy provider.⁴

| Display | 4 in. full-color LCD touchscreen 540 x 540 pixel display | |
| Dimensions | Thermostat Height: 103.89 mm (4.09 in.) Width: 103.89 mm (4.09 in.) Depth: 25.9 mm (1.02 in.) | Trim plate Height: 143.5 mm (5.65 in.) Width: 159.9 mm (6.29 in.) Depth: 7.71 mm (0.3 in.) Power Extender Kit* Length: 62 mm (2.4 in.) Width: 62 mm (2.4 in.) Depth: 23 mm (0.9 in.) *Optional for installation |
| Colors | Black front, die cast metal frame – zinc alloy | |
| Thermostat sensors | Temperature Humidity Occupancy (Radar) Proximity (Radar) | |
| Compatibility | Works with most 24VAC HVAC equipment, including conventional furnaces and air conditioners (2H/2C), heat pumps (2H/2C + 2 stage AUX heat), boilers, and PTACs or fan coil units with up to 3 fan speeds. One 1-wire accessory or one 2-wire accessory support for humidifiers, dehumidifiers, and ventilators (HRV/ERV). | |
| HVAC accessory support | One 1-wire acc. or one 2-wire accessory. Control an accessory HVAC device like a humidifier, dehumidifier, or ventilation device. | |
| Wire Terminals | Rc G Y1 Y2 OB PEK+ C | Rh W1 W2 ACC- ACC+ |
| Connectivity & security | Dual-band Wi-Fi: 802.11 b/g/n @ 2.4GHz, 802.11 a/n/ac @ 5GHz Bluetooth 5.0 WPA, WPA2, WPA3 encryption methods DHCP (dynamic) or static IP addressing 168-bit SSL encryption 915MHz radio | |
| Works with | Apple HomeKit, Amazon Alexa, Samsung SmartThings, IFTTT, and more. | |
| Bandwidth | 15-20 MB/month (dependent on Alexa Voice Service usage) | |
| Power consumption | Up to 3.5 VA | |
| Powering methods | Wired 24VAC through terminals C and Rc. Power Extender Kit enables you to reliably power your thermostat without having to run a fifth wire. | |
| Sustainability | Recycled packaging Mercury-free Arsenic-free PVC-free ROHS compliant | |
| Temperature range | Desired Temperature: 45° to 92°F (7° to 33°C) Display: 40° to 100°F (5° to 37°C) Sensitivity: +/− 1°F (+/− 0.5°C) Operating: 14° to 122°F (-10° to 50°C) | |
| Humidity range | Display: 20% to 90% Sensitivity: +/− 5% Operating: 5% to 95% RH (non-condensing) | |
| Storage | −31° to 113°F (−35° to 45°C) 5% to 95% RH (non condensing) | |
| Warranty | 3-year limited warranty | |
| Languages | English | |
| What's in the box | Smart Thermostat Premium Thermostat mounting plate SmartSensor with detachable stand and adhesive wall-mount Quick-start guide Wire labels Screws and drywall anchors Optional for installation: Power Extender Kit (PEK) Trim plate | |