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    Emerson Sensi Wi-Fi Thermostat

    Model # ST55C|Store SKU # 1000830270

    Overview
    Specifications
    Reviews

    Overview

    Model # ST55C Store SKU # 1000830270

    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. 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. & 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 sensi.emerson.com/compatibility. Put your comfort on your terms with geofencing or 7-day scheduling option with the ENERGY STAR certified Sensi thermostat. Both energy saving features you save about 23% on your HVAC energy usage* so you can save money without compromising your comfort. *Energy savings calculated by comparing operation time for a nationwide sample of Sensi users with temperature adjustments averaging 4 degree F vs users with no adjustments. Savings vary based on equipment type/condition, insulation, climate & temperature adjustment size/frequency. **Based on survey results of 2120 respondents that purchased and installed a Sensi thermostat in 2018, approximately 70% reported installing in 30 minutes or less. Adding a common wire may impact installation time. ***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)

    1. Named the 'Best Value' smart thermostat of 2018 by USA Today's Reviewed.com
    1. SAVE ABOUT 23% ON HVAC ENERGY *: The ENERGY STAR certified Sensi thermostat helps you save on your HVAC energy costs, with features like geofencing, 7-day flexible scheduling, remote access and energy usage reports
    1. GET REBATES: Find utility rebates in your area through the rebate finder at emersoncanada.ca/rebates
    1. MOST INSTALL IN 30 MINUTES OR LESS**: With step-by-step instructions and video tutorials right in the mobile app, most people install Sensi in 30 minutes or less
    1. EXTENSIVE COMPATIBILITY***: Works with the HVAC equipment found in most homes  a c-wire is required for heat-only, cool-only and heat pump systems without aux
    1. SMART HOME COMPATIBLE: Works with Amazon Alexa, Google Assistant, Apple HomeKit (c-wire required) and Wink smart home platforms

    Specifications

    Dimensions

    Assembled Depth (in inches)
    3
    Assembled Height (in inches)
    9
    Assembled Weight (in lbs)
    1.53
    Assembled Width (in inches)
    8.5
    Item Depth
    1.53
    Item Height
    9
    Item Weight
    85
    Item Width
    3

    Details

    Automatic Heating/Cooling Changeover
    Yes
    Battery Back-Up
    Yes
    Battery Operated
    Yes, Yes
    Built-in Wifi
    Yes, Yes
    Certified
    Yes
    Colour Family
    White, White
    Country of Origin
    CN-China
    ENERGY STAR®
    Yes
    Program Type
    7-Day
    Programmable
    Yes, Yes
    Smart Technology
    Yes
    Smart Technology
    Yes
    Vacation Mode
    Yes

    Warranty / Certifications

    3-year warranty
    Sensi Wi-Fi ThermostatPhoto of productFrom 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. 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. & 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 sensi.emerson.com/compatibility. Put your comfort on your terms with geofencing or 7-day scheduling option with the ENERGY STAR certified Sensi thermostat. Both energy saving features you save about 23% on your HVAC energy usage* so you can save money without compromising your comfort. *Energy savings calculated by comparing operation time for a nationwide sample of Sensi users with temperature adjustments averaging 4 degree F vs users with no adjustments. Savings vary based on equipment type/condition, insulation, climate & temperature adjustment size/frequency. **Based on survey results of 2120 respondents that purchased and installed a Sensi thermostat in 2018, approximately 70% reported installing in 30 minutes or less. Adding a common wire may impact installation time. ***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)
    Emerson
    1000830270
    CAD110
    The Home Depot Canada
    Sensi Wi-Fi Thermostat is rated 4.0 out of 5 by 44.
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    Rated 5 out of 5 by from My Dad Loves It I recently got this for my dad as a gift and he loves using it.
    Date published: 2019-04-05
    Rated 5 out of 5 by from Simple Easy To Use After rebate the stat is very cheap, works very well, easily connected to phone application.
    Date published: 2019-03-22
    Rated 4 out of 5 by from good stuff Had it for a month, bought it becasue the engergy saving rebate program, this is the cheapest smart contral you can buy from that rebate eligible list. and it works pretty.
    Date published: 2019-01-21
    Rated 5 out of 5 by from Great value compared to other wifi thermostats Very simple to set up! We are very happy with this product!
    Date published: 2018-12-31
    Rated 4 out of 5 by from Great Value works as expected, install was easy and well documented
    Date published: 2018-12-08
    Rated 1 out of 5 by from Wont stay connected This thermostat is for 750 millivolts eg gas fireplace ,spaceheaters, not your furnace . It has a major flaw, if it loses wifi signal from your router it will make no attemt to reconnect,the only way is to pull the batteries,once the batteries are back in it instantly reconnects, after doing this 6 times since new in 48 hours and with strong wifi signals I will be returning this, I belive this is old old wifi tech ,will wait for next generation 750 millivolt tstat with a auto reconnect feature
    Date published: 2018-11-27
    Rated 1 out of 5 by from Lousy web connectivity I hate this thing. Installed at my cabin. I can get it to connect online only occasionally so I cannot pre heat my cabin. So very frustrating
    Date published: 2018-11-19
    Rated 5 out of 5 by from Great Value Works awsome Installed this in my home, Garage and apartment Can view and control all 3 if need be By my Phone Anywhere in the world... Great buy extremely easy to install and use on My I phone love it!
    Date published: 2018-11-14
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    can you manually raise or lower the temperature from the thermostat or do you have to always do it from your smart phone?

    Asked by: BJ207
    Hello BJ207, Thank you very much for your question. The answer is yes, you may operate the thermostat like a typical manual thermostat from the wall as long as you do not have the Keypad on Lockout. We hope that this answer helps, and please do not hesitate to reach out to us with any other question or comments. Best regards.
    Answered by: Product Expert
    Date published: 2019-04-17

    I have the sensi thermostat and it is going through the batteries within 2 months. noticing in the thread the stat should work off the power from the furnace. What needs to be done in the stat for this to happen?

    Asked by: jaward
    You will need to have the wiring checked between your furnace and the thermostat. We had that same issue and found out the guy who installed our furnace had not wired the thermostat to the furnace correctly.
    Answered by: Kend
    Date published: 2019-04-10

    How often do you have to replace the batteries.

    Asked by: Dw0124
    Hi Dw0124. Depending on their usage, your batteries should last between 6 months to a year.
    Answered by: Product Expert
    Date published: 2019-03-20

    Do the batteries supply power for internet if there is no c-wire?

    Asked by: Dw0124
    Hi Dw0124! With a conventional HVAC system, your thermostat will utilize your system to power the Wi-Fi radio and should only use the batteries as back up. If you have a heat only or cool only system, your thermostat would require a 20-30VAC common wire to help power the Wi-Fi radio.
    Answered by: Product Expert
    Date published: 2019-03-20

    Hi there, Can i switch between AUX and EM. heat manually? Does it need a outdoor indicator to do that? Thanks.

    Asked by: JJCheng
    Hi JJCheng. Sensi uses a system performance based algorithm to sage between your heat pump and your Auxiliary heating and does not require an outdoor sensor.
    Answered by: Product Expert
    Date published: 2019-03-20

    Hi - I'm wondering 1 - how to set it for a vacation then awaken it to my regular program a day before I return and 2 - the Celsius scale does not seem to show half degrees (eg 22.5). Do I need to use the Farenheight scale for increased sensitivity?

    Asked by: Terry T
    Hi Terry T! To have your thermostat hold a specific temperature, you will simply need to set the Schedule to Off, and when you are ready to run the schedule again you will just need to switch the Schedule mode back to On. You can use Farenheit for a more accurate temperature reading. Hope this helps with your questions!
    Answered by: Product Expert
    Date published: 2019-03-20

    Will this work with a 240 Vac Dimplex fan wall heater?

    Asked by: KEBKR
    Hi KEBKR! Sensi is only compatible with 20-30VAC, as it is a low voltage thermostat. Hope this helps!
    Answered by: Product Expert
    Date published: 2019-03-20

    I've 8 wires that're connected to the following on my old unit lables: white to the W1, yellow to the Y1, red to the R, black to the 24(c), Orange to the O, blue to RS2, brown to RS1, and Green to RS+V. Do I have to connect all of them?

    Asked by: Bobby
    No
    Answered by: Gary Cropper
    Date published: 2019-03-16
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