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expiredpersian_mafia | Staff posted Jun 01, 2023 04:55 PM
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expiredpersian_mafia | Staff posted Jun 01, 2023 04:55 PM

Emerson Sensi Wi-Fi Smart Thermostat

+ Free Shipping

$60

$130

53% off
Amazon
87 Comments 20,634 Views
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Deal Details
Amazon has Emerson Sensi Wi-Fi Smart Thermostat (ST55) for $59.60. Shipping is free.

Thanks to Deal Editor persian_mafia for posting this deal.

Key Features:
  • ENERGY STAR-certified Sensi smart thermostat can help you save energy with features like flexible scheduling, remote access, and usage reports
  • Use the built-in level and step-by-step app instructions for a quick installation. Works with HVAC equipment found in most homes. Common wire (c-wire) is not required in most applications
  • 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
  • Looks and feels like a thermostat. Has buttons and fits the same space as a traditional thermostat so you don't have to patch and paint your walls

Editor's Notes

Written by StrawMan86 | Staff
  • About this product:
    • 4.5 out of 5 stars rating at Amazon based on over 19,100 customer reviews
  • About this store:
  • Please refer to the forum thread for additional details & discussion.

Original Post

Written by persian_mafia | Staff
Product Info
Community Notes
About the Poster
Deal Details
Product Info
Community Notes
About the Poster
Amazon has Emerson Sensi Wi-Fi Smart Thermostat (ST55) for $59.60. Shipping is free.

Thanks to Deal Editor persian_mafia for posting this deal.

Key Features:
  • ENERGY STAR-certified Sensi smart thermostat can help you save energy with features like flexible scheduling, remote access, and usage reports
  • Use the built-in level and step-by-step app instructions for a quick installation. Works with HVAC equipment found in most homes. Common wire (c-wire) is not required in most applications
  • 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
  • Looks and feels like a thermostat. Has buttons and fits the same space as a traditional thermostat so you don't have to patch and paint your walls

Editor's Notes

Written by StrawMan86 | Staff
  • About this product:
    • 4.5 out of 5 stars rating at Amazon based on over 19,100 customer reviews
  • About this store:
  • Please refer to the forum thread for additional details & discussion.

Original Post

Written by persian_mafia | Staff

Community Voting

Deal Score
+41
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Price Intelligence

Model: Emerson Thermostats White Wi-Fi Enabled

Deal History 

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Sort: Lowest to Highest | Last Updated 9/9/2025, 07:18 PM
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Ace Hardware$139.99

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Top Comments

DallasGG
1571 Posts
634 Reputation
I have this thermostat....works well with Alexa for me.
gtsh0pp3r
1318 Posts
185 Reputation
This is a very good, no nonsense thermostat, Very easy app function as well
TheStig540
496 Posts
42 Reputation
I enjoy mine. Check with your electric company, a lot of them have rebates. I got mine for a lot less.

86 Comments

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Pro
Jun 01, 2023 07:56 PM
1,571 Posts
Joined Feb 2010
DallasGG
Pro
Jun 01, 2023 07:56 PM
1,571 Posts

Our community has rated this post as helpful. If you agree, why not thank DallasGG

I have this thermostat....works well with Alexa for me. Smilie
1
Jun 01, 2023 10:22 PM
78 Posts
Joined May 2016

This comment has been rated as unhelpful by Slickdeals users.

Jun 01, 2023 10:38 PM
110 Posts
Joined Dec 2007
TorakJun 01, 2023 10:38 PM
110 Posts

Our community has rated this post as helpful. If you agree, why not thank Torak

I've been using one of these in my home for 7 years and installed one in my mother in law's shortly after getting mine. They are no frills and great to use and minimal battery replacement on my part. Also works well with Alexa.
1
Jun 01, 2023 10:53 PM
1,160 Posts
Joined Dec 2006
irod87Jun 01, 2023 10:53 PM
1,160 Posts
Had one of these. Works great for basic wifi connectivity.
Jun 01, 2023 10:58 PM
496 Posts
Joined Apr 2006
TheStig540Jun 01, 2023 10:58 PM
496 Posts
I enjoy mine. Check with your electric company, a lot of them have rebates. I got mine for a lot less.
Jun 01, 2023 11:22 PM
1,604 Posts
Joined Jan 2011
TollerJun 01, 2023 11:22 PM
1,604 Posts

Our community has rated this post as helpful. If you agree, why not thank Toller

Quote from BlueB9 :
Looks like this is operated by battery only.
I've had one for 1.5 years. I have a C wire, but wasn't sure how to hook it up, so I didn't bother. The battery says it still has a full charge. So no, it is not battery only, but it runs just fine on only the battery.
2
Jun 01, 2023 11:33 PM
699 Posts
Joined Jul 2007
onlycashJun 01, 2023 11:33 PM
699 Posts
Quote from Toller :
I've had one for 1.5 years. I have a C wire, but wasn't sure how to hook it up, so I didn't bother. The battery says it still has a full charge. So no, it is not battery only, but it runs just fine on only the battery.

Are you sure you didn't hook up the C wire?


I have several of these and if you're using the WIFI chip the battery probably won't last a year and a half. WIFI uses a lot of power because it's always running.


.
1

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Pro
Jun 01, 2023 11:36 PM
287 Posts
Joined Nov 2015
TomB4719
Pro
Jun 01, 2023 11:36 PM
287 Posts
Quote from onlycash :
Are you sure you didn't hook up the C wire?


I have several of these and if you're using the WIFI chip the battery probably won't last a year and a half. WIFI uses a lot of power because it's always running.


.
I replace the battery every 6 months with a lithium battery. I have the same themostat and it could be free with your electricity provider
Jun 02, 2023 12:04 AM
699 Posts
Joined Jul 2007
onlycashJun 02, 2023 12:04 AM
699 Posts
Quote from TomB4719 :
I replace the battery every 6 months with a lithium battery. I have the same themostat and it could be free with your electricity provider

That sounds reasonable.

I don't believe two AA alkaline batteries would last anywhere near that long.


.
Jun 02, 2023 12:19 AM
9,336 Posts
Joined Nov 2013
AdelleyJun 02, 2023 12:19 AM
9,336 Posts
Dang, St55u is the one my electric company offer rebates for. This is the non-U
Jun 02, 2023 12:23 AM
373 Posts
Joined Jul 2008
U2AVenturesJun 02, 2023 12:23 AM
373 Posts
good price but always check your local utility programs.. these are usually free or $5
Jun 02, 2023 12:24 AM
5,963 Posts
Joined Jan 2008

This comment has been rated as unhelpful by Slickdeals users.

Jun 02, 2023 12:24 AM
816 Posts
Joined Sep 2016
frozenthornJun 02, 2023 12:24 AM
816 Posts
Quote from BlueB9 :
Looks like this is operated by battery only.
Battery or C-wire but if you plan to use the wifi you'll want the C-wire hooked up.
Pro
Jun 02, 2023 12:36 AM
1,571 Posts
Joined Feb 2010
DallasGG
Pro
Jun 02, 2023 12:36 AM
1,571 Posts
Quote from BlueB9 :
Looks like this is operated by battery only.
On mine, the battery is for backup. My batteries are not rechargeable and I think I've replaced them and I've had this thermostat for several years already. I have it hooked up to the electricity for the thermostat.

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Jun 02, 2023 12:42 AM
1,318 Posts
Joined Mar 2008
gtsh0pp3rJun 02, 2023 12:42 AM
1,318 Posts
Quote from BlueB9 :
Looks like this is operated by battery only.
Incorrect, it comes with batteries as a back up, but is powered by HVAC

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