Emerson Sensi Touch Wi-Fi Smart Thermostat with Touchscreen Color Display, Works with Alexa, Energy Star Certified, C-wire Required, ST75 Black 5.625″ x 3.4″ x 1.17″
Emerson Sensi Touch Wi-Fi Smart Thermostat with Touchscreen Color Display, Works with Alexa, Energy Star Certified, C-wire Required, ST75 Black 5.625″ x 3.4″ x 1.17″
Reviewed by: Jessica Coleman | United States
Rating: ★★★★☆ (4.7/5)
The Emerson Sensi Touch Wi-Fi Smart Thermostat (ST75, Black) is a sleek, modern thermostat that delivers an excellent combination of style, smart features, and energy efficiency. Having upgraded to this unit after years with a basic programmable thermostat, I’ve been impressed by how intuitive, fast, and feature-rich it is, while still being affordable compared to some premium competitors like Nest or Ecobee.
Design & Display:
The first thing you notice is the 5.6” x 3.4” color touchscreen display. The screen is bright, sharp, and highly responsive, with a clean interface that feels modern. The black finish gives it a premium look that blends nicely into a variety of home decors.
You can easily swipe between modes, schedules, and settings, making it feel more like using a smartphone than a thermostat. Plus, the backlit display is adjustable, so it’s visible in the dark without being overly bright at night.
Installation & Setup:
The Sensi ST75 does require a C-wire, but once that’s in place, installation is straightforward. Emerson provides a very clear step-by-step guide and an easy-to-follow app that walks you through the process. It took me about 30 minutes from start to finish.
Connecting to Wi-Fi was seamless, and I appreciated that the Sensi app immediately detected my unit and walked me through customizing schedules and settings.
Features & Smart Controls:
Here’s what stood out the most:
- Smartphone App Control: The free Sensi app lets you control the thermostat from anywhere, whether at home, work, or traveling.
- Works with Alexa, Google Assistant, and Apple HomeKit: Hands-free voice control is smooth and responsive.
- Energy Star Certified: Helps cut down on energy use with smart scheduling and eco features.
- Flexible Scheduling: Offers custom schedules for every day of the week.
- Geofencing: Can automatically adjust the temperature when you leave or return home.
- Smart Alerts: Notifications for temperature extremes, humidity, and maintenance needs.
- Color Touchscreen: Responsive and easy to navigate, even for less tech-savvy users.
Performance in Daily Use:
The thermostat responds quickly to commands, whether through the app, Alexa, or directly on the touchscreen. Temperature adjustments take effect immediately, and the accuracy of the readings is spot-on.
The geofencing feature has been particularly helpful—no more worrying about leaving the AC running when I leave the house. I’ve also noticed about a 10–12% reduction in energy bills, which makes the upgrade worthwhile.
Pros:
- Sleek black design with a bright color touchscreen
- Energy Star certified – helps lower utility bills
- Geofencing + remote control via app for convenience
- Compatible with Alexa, Google Assistant, and Apple HomeKit
- Clear, step-by-step installation instructions
- Accurate readings and quick response times
- Intuitive and customizable scheduling
Cons:
- Requires a C-wire, which may mean extra wiring for older homes
- Slightly larger than traditional thermostats, so it stands out on the wall
- No advanced “self-learning” feature like Nest (manual setup required)
- App is functional but could use a more modern design refresh
Final Verdict:
The Emerson Sensi Touch Wi-Fi Smart Thermostat (ST75) is a fantastic balance of affordability, design, and smart features. It doesn’t have all the bells and whistles of pricier models, but it delivers excellent reliability, smart home compatibility, and energy savings at a very reasonable price.
If you’re looking for a thermostat that’s easy to use, attractive, accurate, and works seamlessly with Alexa or Google, this is a strong contender.
Overall Rating: ★★★★☆ (4.7/5) – A smart, stylish, and dependable thermostat that makes home temperature control simple and efficient.
