Model # ST55

Internet #301231478

Store SKU #1002348238

Emerson Sensi Wi-Fi Thermostat for Smart Home
0786710554827

Emerson

Sensi Wi-Fi Thermostat for Smart Home

  • Control from across the room or across the country via mobile app
  • Reduce energy usage with geofencing, scheduling and remote access
  • Works with Apple HomeKit, Amazon Alexa and Google Assistant
Was  $129.00
$9900 /each

Save $30.00 (23%)

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Frequently Bought Together

Installation Options

Product Overview

  • Control from across the room or across the country via mobile app
  • Reduce energy usage with geofencing, scheduling and remote access
  • Works with Apple HomeKit, Amazon Alexa and Google Assistant
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 thermostat 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. and Canada. A c-wire is required for heat-only, cool-only and heat pump (without aux) systems and for use with Apple HomeKit. Check to make sure it will work for you at sensicomfort.com/compatibility. The intuitive app walks you through each step of installation with custom configured instructions, removing all the frustration and guesswork from the installation process so you can be up and running in no time, no experience required. Put your comfort on your terms using location-based temperature control with geofencing or creating custom heating and cooling schedules with the flexible 7-day scheduling option. Both energy saving features help to reduce your HVAC related energy costs so you can save money without compromising your comfort. Plus, Sensi integrates directly with Amazon Alexa, Apple HomeKit and Wink home automation platforms and works with Google Home and Google Assistant via the free Wink app. Connect to Amazon Alexa to control your home temperature with simple voice commands or just ask Siri to set, raise or lower your home temperature when using Sensi with Apple HomeKit.
  • Named the ‘Best Value’ 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
  • Works with Amazon Alexa, Apple HomeKit (c-wire required) and Wink smart home platforms
  • Designed for an easy DIY installation with step-by-step instructions and video tutorials right in the free sensi mobile app
  • Save money on HVAC related energy costs with features like geofencing for location-based temperature control, 7-day flexible scheduling and remote access
  • Extensive compatibility with HVAC systems in most homes – a c-wire is required for heat-only, cool-only and heat pump systems without aux. To check system and router compatibility, refer to our online compatibility resources at sensicomfort.com/compatibility
  • Sensi is not compatible with electric baseboard or line voltage (2-wire) and proprietary/ communicating systems and old millivolt (mV) wall, in-floor or gravity furnaces
  • In-app local weather information and indoor humidity readings
  • 3-year warranty
























  • Click here for more information on Electronic Recycling Programs

Product Overview

  • Control from across the room or across the country via mobile app
  • Reduce energy usage with geofencing, scheduling and remote access
  • Works with Apple HomeKit, Amazon Alexa and Google Assistant
Model #: ST55
Sku #: 1002348238
Internet #: 301231478

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 thermostat 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. and Canada. A c-wire is required for heat-only, cool-only and heat pump (without aux) systems and for use with Apple HomeKit. Check to make sure it will work for you at sensicomfort.com/compatibility. The intuitive app walks you through each step of installation with custom configured instructions, removing all the frustration and guesswork from the installation process so you can be up and running in no time, no experience required. Put your comfort on your terms using location-based temperature control with geofencing or creating custom heating and cooling schedules with the flexible 7-day scheduling option. Both energy saving features help to reduce your HVAC related energy costs so you can save money without compromising your comfort. Plus, Sensi integrates directly with Amazon Alexa, Apple HomeKit and Wink home automation platforms and works with Google Home and Google Assistant via the free Wink app. Connect to Amazon Alexa to control your home temperature with simple voice commands or just ask Siri to set, raise or lower your home temperature when using Sensi with Apple HomeKit.

  • Named the ‘Best Value’ 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
  • Works with Amazon Alexa, Apple HomeKit (c-wire required) and Wink smart home platforms
  • Designed for an easy DIY installation with step-by-step instructions and video tutorials right in the free sensi mobile app
  • Save money on HVAC related energy costs with features like geofencing for location-based temperature control, 7-day flexible scheduling and remote access
  • Extensive compatibility with HVAC systems in most homes – a c-wire is required for heat-only, cool-only and heat pump systems without aux. To check system and router compatibility, refer to our online compatibility resources at sensicomfort.com/compatibility
  • Sensi is not compatible with electric baseboard or line voltage (2-wire) and proprietary/ communicating systems and old millivolt (mV) wall, in-floor or gravity furnaces
  • In-app local weather information and indoor humidity readings
  • 3-year warranty
























  • Click here for more information on Electronic Recycling Programs

Info & Guides

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Customers Also Compared These

Price
Was $129.00
$99.00 /each
Save $30.00 (23%)
$99.98 /each
$119.88 /each
$169.00 /each
Name Sensi Wi-Fi Thermostat for Smart Home Wi-Fi 7 - Day Programmable Thermostat + Free App Wi-Fi Programmable Touchscreen Thermostat + Free App Sensi Touch Wi-Fi Thermostat with Touchscreen Color Display
Brand Emerson Honeywell Honeywell Emerson
Ratings (502) (570) (1661) (36)
Features Automatic Heating/Cooling Changeover,Backlit Display,Battery Back-Up,Battery Operated,Built-in Wi-Fi,Daylight Savings Time Ready,Lockable,Low Battery Indicator Automatic Heating/Cooling Changeover,Backlit Display,Built-in Wi-Fi Automatic Heating/Cooling Changeover,Backlit Display,Built-in Wi-Fi,Daylight Savings Time Ready,Filter Monitor,Removable Interface,Touch Screen,Vacation Mode Automatic Heating/Cooling Changeover,Backlit Display,Built-in Wi-Fi,Daylight Savings Time Ready,Lockable,No Additional Features,Touch Screen
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Specifications

Dimensions

Display height (in.)
9
Display width (in.)
8.375
Product Depth (in.)
.938 in
Product Height (in.)
3.75 in

Details

Battery Power Type
Alkaline
Battery Size
AA
Color Family
Whites
Features
Automatic Heating/Cooling Changeover,Backlit Display,Battery Back-Up,Battery Operated,Built-in Wi-Fi,Daylight Savings Time Ready,Lockable,Low Battery Indicator
Hub Required
No hub connection available
Included
Batteries,Display Base,Mounting Hardware,No Additional Items Included,Thermostat
Periods per Programmable Day
4
Power Options
Battery,C-wire,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
Intuitive Scheduling,Smart Home Hub Compatible,Smart Phone/Android App Compatible
Thermostat Product Type
Smart/Wi-Fi
Thermostat Type
Heating and Cooling
Voice Control Hub Required
No Hub Required for Voice Control
Voltage (volts)
24
Works With
Universal
Works With
Alexa, Apple HomeKit, Siri, Wink

Warranty / Certifications

Certifications and Listings
No Certifications or Listings
Manufacturer Warranty
3 Years

Specifications

Dimensions

Display height (in.)
9
Display width (in.)
8.375
Product Depth (in.)
.938 in
Product Height (in.)
3.75 in

Details

Battery Power Type
Alkaline
Battery Size
AA
Color Family
Whites
Features
Automatic Heating/Cooling Changeover,Backlit Display,Battery Back-Up,Battery Operated,Built-in Wi-Fi,Daylight Savings Time Ready,Lockable,Low Battery Indicator
Hub Required
No hub connection available
Included
Batteries,Display Base,Mounting Hardware,No Additional Items Included,Thermostat
Periods per Programmable Day
4
Power Options
Battery,C-wire,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
Intuitive Scheduling,Smart Home Hub Compatible,Smart Phone/Android App Compatible
Thermostat Product Type
Smart/Wi-Fi
Thermostat Type
Heating and Cooling
Voice Control Hub Required
No Hub Required for Voice Control
Voltage (volts)
24
Works With
Universal
Works With
Alexa, Apple HomeKit, Siri, Wink

Warranty / Certifications

Certifications and Listings
No Certifications or Listings
Manufacturer Warranty
3 Years

Questions & Answers

Does it have an internal battery

Asked by: Paul
Yes
Answered by: Jacy
Date published: 2018-02-24

Does the wifi connection drop a lot?

Asked by: N8
Mav, Try moving your wifi router further away from you thermostat. I had to do this with my Wink hub. It was always dropping, but when I moved it, it quit. I found this out by reading on answered questions about the hub. Hope this helps.
Answered by: canbelmil
Date published: 2018-05-02

Does the display on the thermostat stay lit all the time as pictured in the add?

Does the display on the thermostat stay lit all the time as pictured in the add?
Asked by: ELB
My bad. Askj is correct. You have to have c wire attached but turn it on and have it stay lit, it is in the app under settings/advanced settings. I just stalled it and it works like a charm.
Answered by: MadmanMike
Date published: 2017-11-11

Lost internet connection

Before I buy, I have to ask, Is there some kind of backup if you lose internet connection ?
Asked by: OverKill
It's supposed to maintain the schedule that's active if the wi-fi connection is lost, and believe me, the wi-fi connection on mine drops out a lot. But my schedule still functions without the wi-fi. The schedule can't be revised without the wi-fi connection. The wi-fi connection on mine drops out every few monts and I have to delete the thermostat in the app and reinstall it. A real pain.
Answered by: rmb3005
Date published: 2018-02-28
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Customer Reviews

Sensi Wi-Fi Thermostat for Smart Home is rated 4.4 out of 5 by 502.
Rated 5 out of 5 by from Works perfectly. I can control thermostats from anywhere, they tell me the temperature in the ho... Works perfectly. I can control thermostats from anywhere, they tell me the temperature in the house and the temperature and weather outside. I live an hour away from my grandmother with dementia, so the lockout feature works great for keeping her or her caregivers from constantly adjusting them. All they have to do is call or text me and I can set it for them. Only drawback is there's no emergency way to unlock them if the internet is down. There should be an access code for the screen.
Date published: 2017-12-27
Rated 4 out of 5 by from Had problems with app when installing and setting up. After many unsuccessful attempts, I remembe... Had problems with app when installing and setting up. After many unsuccessful attempts, I remembered that some apps are incompatible with certain Android phones. Used an inactive phone I had that was more expensive than the previous phone, and the app behaved differently and successfully activated the thermostat and completed the app and it worked wonderful the first try. Love this product, since old thermostat was defective and erratic. Would recommend to anyone I Know.
Date published: 2018-01-02
Rated 4 out of 5 by from i had a hard time installing thermostat because my heating system does not have a c wire and i ke... i had a hard time installing thermostat because my heating system does not have a c wire and i kept losing the wi-fi with the help of the sensi support i added a c wire .now it works great and if i lose wi-fi it connects with no problem once the wi-fi comes back the only thing i did not like was where you connect the wires they are so tiny you need tiny tools
Date published: 2018-01-14
Rated 4 out of 5 by from Very happy with the product. It was straight forward and easy to install. I am currently running ... Very happy with the product. It was straight forward and easy to install. I am currently running it on batteries, which means it disconnects from the WiFi from time to time to save battery life but I am ok with that. It has been up for over a month now and the batteries are still showing a full charge. I will run new thermostat wire so that it is connected all the time but I was happy to have the ability to temporarily utilize the thermostat with the old wiring. The only bad thing I can say, and it's not even that big of a deal, is when utilizing the installation guide with their app it has you mark what wires exist from the previous thermostat and if you only select red and white it tells you this is an invalid configuration. This is wrong because you can operate this thermostat without a common wire, which was a big selling factor for me. You just need to fully rely on the batteries
Date published: 2018-01-02
Rated 4 out of 5 by from It works very well most of the time. It... It works very well most of the time. It doesn’t have all the features of some of the other smart thermostats but it can set the temperature when you’re away from the home using the app. The main problem is that sometimes it just loses the connection to the WiFi which gets pretty annoying.
Date published: 2017-12-13
Rated 5 out of 5 by from The C-wire pain in the neck won’t on your way... The C-wire pain in the neck won’t on your way anymore. This is good for people who live an apartment complex without running any extra wires.
Date published: 2017-12-26
Rated 5 out of 5 by from It was a little confusing setting it up, but now... It was a little confusing setting it up, but now it is awesome. I can reset the thermostat easily from my phone, laptop or Ipad.
Date published: 2017-12-27
Rated 4 out of 5 by from Easy to install. Occasionally the connection to Sensi’s cloud... Easy to install. Occasionally the connection to Sensi’s cloud is lost. Works great with Alexa. Overall, great value.
Date published: 2017-12-19
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