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    From across the room or across the country, your Sensi Wi-Fi thermostat makes it easy to remotely control and schedule your home comfort - Anytime. Anywhere. Designed to work with the wires you already have, Sensi does not require a common wire (c-wire) for most installations, so it is compatible with the HVAC equipment in many homes in U.S. Put your comfort on your terms with flexible 7-day scheduling options for quick, custom heating and cooling schedules that can save money on HVAC related energy costs.

    Check your system compatibility before you buy at

    What's in the box?

    • Sensi Wi-Fi Thermostat
    • Thermostat base
    • Mounting hardware
    • Quick-start guide
    • Wire labels
    • Security code card
    • 2 AA lithium batteries


    Model Number ST55
    Total Width (inches) 8.38
    Total Length (inches) 3.75
    Depth (inches) 0.94
    Thermostat Sensors temperature, humidity, proximity, weather forecast
    Remote Sensors No
    Powering Methods Battery: 2 AA batteries. Wired: 20 to 30 VAC through terminals C and Rc or Rh. NEC class II, 50/60 Hz
    Compatible With 24-Volt Heating & Air Conditioning Systems
    Works With Apple HomeKit, Amazon Echo, Amazon Alexa, and Wink
    Security/Privacy Wi-Fi 802.11b/g/n @ 2.4 GHz; WPA and WPA 2 encryption methods
    Manufacturer Warranty 3 years



    Instant Rebate: $50.00


    The DTE Customer price is only available to DTE residential customers. In the cart, you must first select “Apply Rebates” and your DTE gas and/or electric service will be validated via the shipping address you enter. Qualified rebates will be applied to your order. 

    Customer is eligible for one thermostat rebate per account.




    ecobee SmartThermostat with Voice Control

    ecobee3 lite


    Retail Price $249.00 $169.00 $129.99
    DTE Customer Price $199.00 $119.00 $79.99
    Voice Enabled    
    Touch Display  
    Occupancy Detection  
    Tracks Energy Usage/Savings  
    ENERGY STAR® Certified
    Room Sensors     ✔ ** ✔ *  
    Manufacturer Warranty (Years) 3 3 3
    Works With Apple HomeKit, Amazon Alexa, Samsung SmartThings, IFTTT Amazon Echo, Amazon Alexa, Google Home Assistant, Samsung Smart Things, Apple Homekit, IFTTT and Wink Apple HomeKit, Amazon Echo, Amazon Alexa, and Wink

    * sold separately

    ** included


    Check your system compatibility before you buy at


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