Emerson Sensi Touch Wi-Fi Thermostat with Touchscreen Color Display for Smart Home, ST75, Works with Alexa
Named the ‘Best Overall’ smart thermostat of 2017 by USA Today’s Reviewed.com
Remotely control your home comfort from your smartphone or tablet using the free Sensi app for Android and iOS devices
Features HD touchscreen color display with easy-to-read temperatures, back glow and intuitive menus
Integrates with Amazon Alexa, Apple HomeKit, Google Assistant and Wink
Save money on HVAC related energy costs with features like geofencing, 7-day flexible scheduling and remote access
Extensive* compatibility with HVAC systems in most homes - all system types require a common wire (c-wire). To check system and router compatibility, refer to our online resources at sensicomfort.com/compatibility
Designed for an easy DIY installation with intuitive, step-by-step instructions in the free Sensi mobile app and thoughtful design features like illuminated easy-click terminals
Smart alerts to detect extreme temperature and humidity levels in
From the manufacturer
Choose from two different ways to control your home comfort:
Geofencing: Sensi uses your smartphone’s location to avoid wasteful heating and cooling when you’re away, and makes sure your home is exactly how you like it when you arrive
Flexible Scheduling: With independent programming options for each day of the week, Sensi lets you create and customize your unique schedule to fit your lifestyle
Effortless DIY installation. Hassle-free connection
Even if you have never installed a thermostat before, we've got your back. Using the free Sensi mobile app, simply select the wires that are connected to your old thermostat, and let the app automatically configure the setting that matches your home.
With clearly illustrated in-app instructions and illuminated easy-click wire terminals, Sensi Touch Wi-Fi Thermostat takes all of the frustration and guesswork out of the installation process. Easily connect to your wireless network in no time, and once you're up and running, you can use the intuitive controls to create a custom schedule in seconds, or set your thermostat to adjust automatically using geofencing for location-based temperature control.
Illuminated easy-click terminals and built-in level for easy installation
Free mobile app with intuitive, step-by-step installation instructions
Should you need any help along the way, our highly trained technical support team is available, seven days a week
Make sure the Sensi thermostat will work in your home
Check compatibility using the free compatibility check tool on our website.
Sensi thermostat is not compatible with:
Line voltage or electric baseboard heating
Proprietary/ communicating/ serial protocol
Millivolt (mV) systems; but can be made compatible with the addition of a 24 volt transformer
Incompatible routers: Refer to Sensi's online compatibility resources
Designed to work for you
The Sensi Touch Wi-Fi Thermostat is designed to work with the existing wiring on gas, oil, geothermal, heat pump and radiant heat systems – up to 4 stages of heating and 2 stages of cooling.
A common wire (c-wire) is required for all system types. For more details on compatibility, refer to Sensi's online compatibility resources or contact our customer support.
The Sensi Touch Wi-Fi Thermostat is compatible with the following systems:
Conventional - up to two stages of heating and two stages of cooling (2H/2C)
Heat Only and Cool Only
Heat Pump (With or Without Aux) - up to four stages of heating and two stages of cooling (4H/2C)
Gas, Oil, Electric
Geothermal and Dual-fuel
A c-wire is required for all system types. If you don't have a common wire, 'Emerson Thermostat Common Wire Kit' is available for purchase
More comfort. More savings
With Sensi Touch Wi-Fi Thermostat, you never have to choose between saving money and staying comfortable. Your Sensi Touch Wi-Fi Thermostat features location-based temperature control with geofencing, 7-day programmable heating and cooling schedules and remote access to help you save money on your HVAC related energy costs without compromising your comfort.
In the know. No matter what
Even when you are not at home, your Sensi thermostat detects extreme temperatures and humidity levels and lets you know if your system isn’t working properly. In fact, the Sensi hardware is designed to control your heating and cooling according to your settings even if you lose your Wi-Fi connection. And with 1 degree accuracy, among the tightest tolerances marketed in the industry, your Sensi thermostat gives you the option of keeping your home temperature within one degree of where you set it.
Highly-rated for a reason
We’re proud of our customer reviews. See for yourself why the Sensi thermostat consistently receives outstanding reviews for customer support. Our highly-trained Sensi Support Team can be reached through the official website. Visit our
The Sensi Touch Wi-Fi Smart Thermostat puts comfort control at your fingertips whether you are at home or on-the-go. Just a tap of the easy-to-use touchscreen display or free mobile app lets you remotely access, change or program your home temperatures – Anytime. Anywhere.
Designed to work with HVAC equipment in most homes* (U.S. & Canada only), Sensi guides you through each step of the DIY installation process with proven, in-app instructions. A common wire (c-wire) is required for all system types. Refer to our online compatibility resources at sensicomfort.com/compatibility to make sure Sensi thermostat will work in your home.
Once your Sensi thermostat is up and running, you can let your location automatically adjust your temperature settings with geofencing, or use the intuitive controls to create a custom schedule to fit your lifestyle and save money on HVAC related energy costs. Plus, your Sensi thermostat integrates directly with Amazon Alexa, Apple HomeKit, Google Assistant and Wink home automation platforms, to give you a complete smart home experience. Set, lower or raise your home temperature with simple voice commands using Amazon Alexa or control your Sensi thermostat using Siri on your iPhone or iPad. Connect to comfort in color with thoughtful design features like intuitive menus, easy-to-read temperatures, back glow, precision temperature control, smart alerts and more. What’s more, Sensi Touch Wi-Fi Thermostat has been named the ‘Best Overall’ smart thermostat of 2017 by USA Today’s Reviewed.com.
If you need anything, we’re here to help. Visit sensicomfort.com/support for around-the-clock access to support articles, instructional downloads and comprehensive support videos. Our highly-trained Sensi Support Team can be reached at firstname.lastname@example.org or 1.888.605.7131, seven days a week. *Does not work with electric baseboard heat and some other systems.
System requirements for mobile app:
iOS - 10.0 or above
Android - 4.2 or above (5.0 or greater to use the Geofencing feature)
Part Number ST75
Item Weight 13.6 ounces
Product Dimensions 3.4 x 5.6 x 1.2 inches
Item model number ST75
Size 1 Inch
Item Package Quantity 1
Display Style Touchscreen
Included Components Thermostat, free mobile app, mounting hardware, wire stickers, installation guide, welcome guide with Sensi code, warranty booklet
Batteries Included? No
Batteries Required? No