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Internet # 301231478

Model # ST55

Store SKU # 1002348238

Sensi 7-day Programmable Wi-Fi Smart Thermostat, No C-Wire Required for Most Systems

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  • Easy DIY Install with no c-wire required in most systems
  • Control from anywhere with our top-rated mobile app
  • Compatible with most systems, including heat pumps
  • View More Details
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Product Details

About This Product

DIY your smart home with the Sensi smart thermostat. Compatible with most residential HVAC systems and so easy to install—no common wire (c-wire) required in most applications. You can trust Sensi as we do not sell your personal information to third parties. And Sensi comes with the dependable performance and reliability you can count on from our 100 years of HVAC experience.

Highlights

  • TOP RANKED: Awarded Reader's Choice Best Smart Thermostat by PCMag and Editor's Choice Best Value Smart Thermostat by USA Today's Reviewed
  • EASY DIY INSTALLATION: Use the built-in level and step-by-step app instructions for quick installation. Works with HVAC equipment found in most homes. Common wire (c-wire) is not required in most applications
  • SAVE ABOUT 23% ON HVAC ENERGY*: The ENERGY STAR-certified Sensi smart thermostat can help you save energy with features like flexible scheduling, remote access and usage reports
  • FAMILIAR OPERATION: Looks, feels and operates just like a traditional thermostat
  • PRIVACY PROTECTION*: Sensi won’t sell your personal information to third parties
  • SMART MAINTENANCE: Sensi can help monitor the performance and efficiency of your HVAC system by delivering valuable usage reports, alerts about your equipment and maintenance reminders like filter replacement
  • MADE TO FIT: Sensi fits the same space as a traditional thermostat so you don’t have to patch and paint your walls
  • RELIABILITY: Includes 3-year manufacturer warranty. 5-year limited warranty for professional installation
  • PROVEN PERFORMANCE: Over 100 years of experience and excellence in HVAC
  • Smart alerts: Sensi features smart alerts to help detect extreme temperature and humidity levels in your home
  • How to install and replace your thermostat
  • Click here for more information on Electronic Recycling Programs
  • Return Policy
  • California residents
     see Prop 65 WARNINGS

Product Information

Internet # 301231478

Model # ST55

Store SKU # 1002348238

Specifications

Dimensions

Display height (in.)

2 in

Display width (in.)

2.5 in

Product Depth (in.)

1 in

Product Height (in.)

3.75 in

Details

Battery Power Type

Alkaline

Battery Size

AA

Color Family

White

Color/Finish

White

Control Type

Manual, Phone Controlled

Features

Auto Changeover, Backlit Display, Battery Back-Up, Built-in Wi-Fi, Daylight Savings Time Ready, Low Battery Indicator, Outdoor Temperature Display, Vacation Mode

Heating & Cooling System Type

2 Stage

Hub Required

No hub connection available

Included

Batteries, Display Base, Mounting Hardware, No Additional Items Included

Pack Size

1

Periods per Programmable Day

7

Power Options

Battery, C-wire, Hardwired

Power Options

Hardwired

Remote Access

Remote Access

Requires Hub?

No Hub Required

Returnable

90-Day

Shape

Rectangle

Smart Home

Smart Home Enabled

Smart Home Protocol

Wi-Fi

Smart Technology

Geo Fencing, Intuitive Scheduling, Smart Home Hub Compatible, Smart Phone/Android App Compatible

Thermostat Compatibility

Universal

Thermostat Product Type

Smart/Wi-Fi

Thermostat Shape

Rectangular

Thermostat Type

Heating and Cooling

Voice Control Hub Required

No Hub Required for Voice Control

Voltage (V)

24 V

Voltage Type

Low Voltage

Wire Configuration

C-Wire

Works With

Alexa, Apple HomeKit, Siri

Warranty / Certifications

Certifications and Listings

Energy Star, Title 24

Manufacturer Warranty

3 Years

Questions & Answers

340Questions
caret
Q:Home Depot says this thermostat does not need a C-wire... But the instructions say it needs a C-wire... Does this thermostat need a C-wire???
by|Apr 4, 2024
1 Answer
Answer This Question

A:  Thank you for your question regarding our Sensi Smart Thermostat. We apologize for any confusion regarding the "C" wire requirement. When installed to heat-only, cool-only, or heat pump systems, the Sensi does require a "C" wire in order to maintain Wi-Fi connection. If you have additional questions regarding your options for adding a "C" wire, please visit our website: https://sensi.copeland.com/en-us/support/c-wire. Thank you again for your question.

by|Apr 5, 2024
    caret
    Q:I have 24 voltage on my home has Electric furnace and central air conditioning. Will this thermostat work ?
    by|Feb 26, 2024
    1 Answer
    Answer This Question

    A:  Thank you for your question regarding our Sensi smart thermostat. Based on the information you provided, your system may be compatible. Please check out our Sensi wire picker on our website: https://webapps.copeland.com/resources/wire-picker.aspx to further verify compatibility. If you are still unsure email a photo of your wiring to our technical support team at support@sensicomfort.com. Thank you again.

    by|Feb 27, 2024
      caret
      Q:Will it work with a heat pump electric system
      by|Feb 20, 2024
      0 Answer
      Answer This Question
      caret
      Q:Can two or more phones be used to connect to this thermostat?
      by|Feb 19, 2024
      1 Answer
      Answer This Question

      A:  Hi Warren, thank you for your question about our Sensi smart thermostat. You can connect 2 or more phones/devices to a thermostat. You will have to use the same email and password when logging in to the Sensi app on your other devices. Thank you again for your question.

      by|Feb 21, 2024
        Showing 1-4 of 340

        Customer Reviews

        4.5 out of 5

        • 4.5 out of 2,530 reviews
        • 89% recommend this product
        Filter by:
        Showing 1-10 of 2,530 reviews
        Sensi changed our days- instantly !
        Not only did our day to day become easier because we’re saving money due to the “schedule” setting- which works so well for us…. But our days became more *comfortable* instanly as well, with a lot less thought going into our thermostat- and more time spend enjoying our home as a family. Thanks Sensi!
        by
          • Recommended
          Great product
          I bought this month ago and it’s so great product!!
          by
            • Recommended
            Great Thermostat
            Best purchase I ever made and was super easy to install.. installed in 20 minutes start to finish and if I could install… no c wire needed .. anyone can… paired with Alexa and works like a dream.. so happy I purchased!! Don’t hesitate.. just buy… you won’t regret it!
            by
              • Recommended
              it has a mind of its own
              I purchased this smart stat to be able to program from my phone my electric bill went from $190 to $1119. after having it for a month and according to my electric company my unit was running on auxiliary heat ( i didn't have the aux on) and not only that the unit would not cut off when the temperature reached the set point and it would have the unit warm parts of the house while the parts remain cold, i will never buy other smart thermostat EVER! I do not recommend
              by
              Response from Emerson ThermostatsJan 18, 2024
              Thank you for your review of our Sensi smart thermostat. We are sorry to hear you are having issues with your auxiliary heat. Please reach out to our technical support team at support@sensicomfort.com and request Tier 2 assistance. EmersonResidentialRetail
                1 found this review helpful
                I Love my Sensi Thermostat
                I had the Sensi Thermostat installed along with a new furnace. It has been such a great buy. I absolutely love the app and my ability to adjust my heat at my fingertips. My bedroom is located on the 2nd floor and the Sensi is on the 1st floor. Unfortunately, I experience hot flashes during the night. With the app, I am able to adjust the temp instantly and this is so great. I have recommended this to multiple family members and friends.
                by
                  • Recommended
                  Easy to read
                  This is so easy to install and makes it so much better to read the temperature. The actual operation of it is a breeze. Also with having the APP. I can adjust it from anywhere in the house.
                  by
                    • Recommended
                    Smart thermostat at a fair price
                    Took advantage of a $75 rebate from Enbridge as we were looking to replace our old thermostat and enjoy the wifi enabled smart featured. So far the Sensi has performed excellently and the installation was straightforward and instructions were easy to follow.
                    by
                      I have no regrets get this thermometer for my home
                      It a month ago since I bought this and I am very happy
                      by
                        • Recommended
                        Great thermostat
                        Installed thermostat one month ago to replace a nest product we had. Was easy to install and set up. Gives me the same information as our old one and at a better price. Also connects to phone.
                        by
                          • Recommended
                          Sensi ST55
                          When looking for a replacement thermostat to meet my wants, this was the first one I knew I wanted; however, no stores had it stocked around my area at the time. My wife discovered it online through duke energy, our power provider, for a fraction of the cost. This thermostat takes you step-by-step throughout the installation, to the point you can enter in your old wire configuration and it verify whether it’s a proper configuration and how to connect to this thermostat. The mounting pattern was identical to my old thermostat. The Wi-Fi connected quickly with no problems since installation making the thermostat easy to control via the downloadable app for your phone. Since upgrading to this thermostat it does seem that the farthest rooms from my unit are getting a little more cooler than before.
                          by
                            • Recommended
                            Showing 1-10 of 2,530 reviews

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                            Features

                            Auto Changeover, Backlit Display, Battery Back-Up, Built-in Wi-Fi, Daylight Savings Time Ready, Low Battery Indicator, Outdoor Temperature Display, Vacation Mode

                            Auto Changeover, Backlit Display, Battery Back-Up, Built-in Wi-Fi, Daylight Savings Time Ready, Filter Indicator, Low Battery Indicator, Touch Screen

                            Built-in Wi-Fi, Lockable, No Additional Features, Outdoor Temperature Display, Touch Screen

                            Daylight Savings Time Ready, Vacation Mode

                            Power Options

                            Hardwired

                            Hardwired

                            Battery Operated

                            Hardwired

                            Thermostat Compatibility

                            Universal

                            Universal

                            Universal

                            Universal

                            Wire Configuration

                            C-Wire

                            3-Wire

                            2-Wire

                            C-Wire

                            Control Type

                            Manual, Phone Controlled

                            Manual, Phone Controlled, Voice Controlled

                            Touchscreen

                            Dial, Manual, Phone Controlled