#1 Home Improvement Retailer

Internet #

301231478

Model #

ST55

Store SKU #

1002348238

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

$9900
Limit 5 per order
$116.10
Save $17.10 (15%)
Apply Now
Pay $74.00 after $25 OFF your total qualifying purchase upon opening a new card. info
Apply for a Home Depot Consumer Card
  • 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
Store
0 in stock
caret

Product Details

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.
  • 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
caret

Specifications

caret

Questions & Answers

316Questions
caret
Q:I just installed this excellent thermostat. I see the humidity displayed on the display and in the Sense app. Humidity is not displayed in Homekit. It just says --% (no value). Is this a bug or a feature? The current temp and setting are displayed.
by|May 28, 2023
0 Answer
Answer This Question
caret
Q:Can a web site be used to manage the ST55? (do programming and overrides) The Emerson website indicates that the Manager web page is only accessible for a fee.
by|May 3, 2023
1 Answer
Answer This Question

A:  No, unless you do have the Sensi Multiple Thermostat Manager for a fee.

by|May 25, 2023
    caret
    Q:Does this have a button for humidity control?
    by|Mar 10, 2023
    2 Answers
    Answer This Question

    A:  Yes, thru the Sensi app there is humidity control

    by|Mar 12, 2023

      A:  Yes, thru the Sensi app there is humidity control

      by|Mar 12, 2023
        caret
        Q:Why does the battery die so fast
        by|Feb 25, 2023
        1 Answer
        Answer This Question

        A:  I have the previous version of the ST55, they look identical except mine says Emerson, not Sensi. I do not have a C Wire and I have not changed the batteries for over 4 years. My version cannot do HomeKit, you might be using HomeKit without a C Wire??

        by|Mar 4, 2023
          Showing 1-4 of 316
          caret

          Customer Reviews

          4.5 out of 5
          (2,073)
          • 4.5
            out of 2,073 reviews
          • 88% recommend this product
          Filter by:
          Showing 1-10 of 2,073 reviews
          Love this sensi thermostat
          I have had this thermostat for approximately one month. Bought cause I travel a lot and I can control and know that my cooling/heating system is still working. It is easy to install, nice design. Sends alerts to my phone if humidity is too high. If I want to be lazy I can control the temperature without getting up. Great product
          by
            • Recommended
            I like so much
            I bought this one month ago, I like so much, I can used my cellphone
            by
              • Recommended
              Awesome!
              Installation was easy and straightforward. The connection and operation is awesome from anywhere. The idea of adjusting temperature away from home is the why I bought it!
              by
                • Recommended
                Couldn't be happier! Great app and thermostat.
                Recently, a friend had recommended I install a wifi thermostat in my home. I purchased this one through my energy providers online store. As I was in the market for a new one, this thermostat was a no-brainer for me. Couldn't be happier with my choice. As for installation, I am a DIY kinda guy and had no trouble at all with this install. Before receiving the tstat, I had installed the app on my phone and went through a mock setup. Once you're ready to put the tstat on the wall, the app will guide you through the entire installation. For me it was like.....15 minutes tops and it's on the wall, paired with wifi, and I'm running with the app. I wanted a base plate on the wall. They were out of stock on the plate for this model, so I took a chance and purchased the one for the touch model. It worked fine. I just had to lightly file two small beads on the plate to allow the tstat a flush mount against the plate. I like the look. It's optional, you don't have to have it. As for functionality, I love it!!! The wifi and the app make all the difference. I've had programmable tstats. To me, they are clumsy at best. With this setup, from ANYWHERE, I can see my current system status, add or alter current or upcoming system schedule, check daily usage, and all kinds of other good stuff. What I now have here is a boy toy, some would say, but if used properly will save you energy, wear and tear on your hvac equipment, MONEY, and provide you a greater level of comfort and confidence in your home. Last week, my wife and I joined friends out for dinner. Before leaving I noted the tstat was at 71 degrees, as it was set to be. We were going to be gone for several hours. Using the app, cause it's more fun then using the tstat, I set the heating temp to be 67 degrees. I asked our cat if he was ok with that and he was fine. For him, it was better than being outside, which was 20 something degrees. As it turns out, and I know this by monitoring the app, our indoor temperature never got below 69 degrees while we were gone, and our heating system did not have to kick on. Then, at the right time, before heading home, I took the schedule out of hold, calling then for the preset 71 degrees. I watched the app respond, the phone screen turns orangish when heating, and knew our home would be toasty warm when we got home. Which it was thank you very much. We were away from home for nearly 4 hours. I had eliminated 2 maybe 3 heating cycles. You do the math. Yes, you have choices. There are a lot of wifi thermostats on market today. I made a good choice. To say it again, Thank you Ameren, my energy provider, and Emerson Sensi, for a great product and app.
                by
                  • Recommended
                  Great features
                  We purchased this a month ago, and it is the easiest thermostat to use!
                  by
                    • Recommended
                    Easy to install and operate
                    My old Emerson thermostat died after 22 years. It was so good I wanted to stay with the same brand. Installation was easy. The user interface is really straightforward. And the app, though not strictly required is a bonus.
                    by
                    Response from Product ExpertDec 13, 2022
                    Hi Ottwem, thanks for your review. We are glad that you are enjoying your experience with Sensi. EmersonCanada
                      • Recommended
                      Sensi Thermostat
                      Love my new thermostat. Easy to installed. I definitely would recommend.
                      by
                        • Recommended
                        Sensi
                        I purchase this and install it. I have a Air Conditioner with Heat pump because live in TN that don't behave basement. It seem when I had cool on heat would kick in. Call support and the person was very helpful. He ask me to send photo on way old thermostat was hookup and way I had New one hookup. He had me move to wires and help me reprogram unit and now works great. The wireless on it is great so can change it by my smartphone. Picture of New and Old hookup
                        by
                          • Recommended
                          Sensi thermostat
                          Super easy to install less that 10mins, and connect to your phone. The price is the best thing. I bought and returned a Nest first. That is junk and unbelievable hard to install and connect.
                          by
                          • Verified Purchase
                          • Recommended
                          User Friendly
                          So far working great. I have cycle settings at slow. No C wire. A little confusing to connect to WiFi but got it. App is easy to use. I like the user friendly interface. Shows humidity level also. Using it for 3 days now. Hope it keeps up.
                          by
                            • Recommended
                            1 found this review helpful
                            Showing 1-10 of 2,073 reviews

                            Frequently Bought Together

                            Top Rated
                            +
                            +
                            Price:
                            $9900
                            $116.10
                            Save $17.10 (15%)

                            Compare Similar WiFi Thermostats

                            current product
                            Top RatedSensi 7-day Programmable Wi-Fi Smart Thermostat, No C-Wire Required for Most Systems
                            BCC100 Connected Control 7-Day Wi-Fi Internet 4-Stage Programmable Color Touchscreen Thermostat with Weather AccessT9 WiFi 7-Day Programmable Smart Thermostat with Touchscreen Display and Smart Room SensorTop RatedNest Learning Thermostat - Smart Wi-Fi Thermostat - Polished Steel
                            BrandEmersonBoschHoneywell HomeGoogle
                            NameSensi 7-day Programmable Wi-Fi Smart Thermostat, No C-Wire Required for Most SystemsBCC100 Connected Control 7-Day Wi-Fi Internet 4-Stage Programmable Color Touchscreen Thermostat with Weather AccessT9 WiFi 7-Day Programmable Smart Thermostat with Touchscreen Display and Smart Room SensorNest Learning Thermostat - Smart Wi-Fi Thermostat - Polished Steel
                            Price
                            $9900
                            $116.10
                            Save $17.10 (15%)
                            $15700
                            $21900
                            $24900
                            Ratings
                            (2068)
                            (79)
                            (150)
                            (22768)
                            FeaturesAuto Changeover,Backlit Display,Battery Back-Up,Built-in Wi-Fi,Daylight Savings Time Ready,Low Battery Indicator,Outdoor Temperature Display,Vacation ModeBuilt-in Wi-Fi,Lockable,No Additional Features,Outdoor Temperature Display,Touch ScreenAuto Changeover,Backlit Display,Built-in Wi-Fi,Daylight Savings Time Ready,Filter Indicator,Lockable,Low Battery Indicator,Outdoor Temperature Display,Touch Screen,Vacation ModeRemovable Interface
                            Power OptionsBattery,C-wire,HardwiredC-wire,HardwiredC-wire,HardwiredPlug-in
                            Thermostat CompatibilityUniversalUniversalUniversalUniversal
                            Wire ConfigurationC-Wire2-Wire4-WireC-Wire
                            Control TypeManual,Phone ControlledTouchscreenPhone Controlled,TouchscreenDial,Manual,Phone Controlled
                            Heating & Cooling System Type2 Stage2 Stage2 Stage2 Stage
                            Voltage (volts)24 V24 V24 V24 V
                            Thermostat ShapeRectangularRectangularRectangularRound
                            Voltage TypeLow VoltageLow VoltageLow VoltageLine Voltage
                            View ProductView ProductView ProductView Product