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Emerson Sensi Smart Thermostat ST55 Energy Star & Smart Alerts Sealed NEW

robynresells11
(443)
Registered as a private seller
Consumer protection regulations resulting from EU consumer law are therefore not applicable. eBay buyer protection still applies to most purchases.
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US $74.00
Approximately£55.07
or Best Offer
Condition:
New
Pay less? Turn old devices into money with Trade In
Postage:
US $10.05 (approx £7.48) USPS Ground Advantage®.
Located in: Modesto, California, United States
Delivery:
Estimated between Wed, 30 Jul and Fri, 1 Aug to 94104
Delivery time is estimated using our proprietary method which is based on the buyer's proximity to the item location, the delivery service selected, the seller's delivery history and other factors. Delivery times may vary, especially during peak periods.
Returns:
No returns accepted.
Payments:
    Diners Club

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eBay item number:388732097620
Last updated on 22 Jul, 2025 04:27:12 BSTView all revisionsView all revisions

Item specifics

Condition
New: A brand-new, unused, unopened and undamaged item in original retail packaging (where packaging ...
UPC
0786710554827

About this product

Product Identifiers

Brand
Emerson
MPN
ST55
UPC
0786710554827
Model
Emerson Sensi
eBay Product ID (ePID)
17033941015

Product Key Features

Power Source
Corded Electric, Battery
Year Manufactured
2019
Battery Size
AA
Compatible Product
Universal
Control Style
Remote Control, Push Button, App Control, Digital, Touch, Voice
Compatible Brand
Oil, electric dual fuel, Geothermal, Gas, Emerson
Color
White
Thermostat Shape
Rectangular
Mounting
Wall-Mounted
Number of Periods per Programmable Day
4
Cool Stages
1
Programmability
Programmable
Wire Configuration
4-Wire
Smart Home Compatibility
Apple HomeKit, Wink, Google Home/Assistant, Amazon Alexa, Samsung SmartThings
Display Size
5 in (12.7 cm)
Voltage
24 V
Heat Stages
1
Features
Built-In WiFi, Bluetooth, Wi-Fi, Remote Control, Low Battery Indicator, Smart Connectivity, App Control, Filter Replacement Indicator, Touch Screen, Adjustable Thermostat, Night Light, Automatic Changeover, Digital Display, Battery Backup, Daylight Savings Time Ready
Thermostat Programmable Days
7- Day
Compatible Model
ST55
Material
Plastic
Sensor Technology
Temperature
Voltage Type
Low Voltage
System Switching
Auto

Dimensions

Item Height
3.75 in
Item Weight
0.55 lb

Item description from the seller

About this seller

robynresells11

100% positive Feedback•1.1K items sold

Joined Jan 2021
Usually responds within 24 hours
Registered as a private sellerThereby, consumer rights stemming from EU consumer protection law do not apply. eBay buyer protection still applies to most purchases.
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Detailed seller ratings

Average for the last 12 months
Accurate description
4.9
Reasonable postage cost
4.7
Delivery time
5.0
Communication
5.0

Seller Feedback (367)

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  • r***r (96)- Feedback left by buyer.
    Past 6 months
    Verified purchase
    Great deal here, shirt seemed to be in original packaging and shipping was fast. Good price and arrived as described. Great seller!
    Taylor Stitch The California In White Jacquard Dot button down shirt L 42 (#388223670474)
  • 1***m (6)- Feedback left by buyer.
    Past 6 months
    Verified purchase
    robynresells11 was very responsive to my questions regarding One Touch Ultra 2 Glucose Meter case. When I requested if the case had a slot for holding the insulin pen, I quickly received a picture showing the spot. I received the case on time and in the excellent condition shown in pictures. Thank you robynresells11 for a friendly and convenient purchase experience!
    One Touch Ultra 2 Blood Glucose Meter Monitor Glucometer With Case/ Accessories (#388275714352)
  • i***s (283)- Feedback left by buyer.
    Past 6 months
    Verified purchase
    Great buyer experience. A+ seller - great communication, fast shipping, & great packaging
    Taylor Stitch The Task Jacket everwaxed navy chore jacket 40/M (#386652365005)
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Product ratings and reviews

Learn more
4.4
21 product ratings
  • 15 users rated this 5 out of 5 stars
  • 3 users rated this 4 out of 5 stars
  • 1 users rated this 3 out of 5 stars
  • 0 users rated this 2 out of 5 stars
  • 2 users rated this 1 out of 5 stars

Would recommend

Good value

Good quality

Most relevant reviews

See all 21 reviews
  • by jfsheu_bay
    17 Jul, 2023Most favourable review

    good thermostat but some improvements needed.

    easy to set up and install. user friendly app is provided for the unit. However, some improvements can be made for trend data. My previous wifi thermostats do provide temperature change historical chart. This help me to judge performance of my heating system while I was traveling overseas during winter season. Sensi thermostat only provides temperature reading at the time when I open the app. I have no way to know the readings one hour ago unless I keep watching it.

    Verified purchase: YesCondition: Pre-ownedSold by: relax_and_take_five

  • by jowig67
    18 Mar, 2024

    3rd Sensi, and would buy again.

    Very good product, without problem. Setup was a little challenging, but their techs helped us get it working on our system. We own 3, at different locations. Would buy a gain.

    Verified purchase: YesCondition: Pre-ownedSold by: goods-f-less

  • by johaddi-0
    13 Jan, 2025

    I have been using Sensi ST-55s in three ...

    I have been using Sensi ST-55s in three residential places, two states, and with two internet providers. I have had no problems with this item or its installation. It is a quality product, and I am now using it with two wire condensation boilers without a C-wire.

    Verified purchase: YesCondition: NewSold by: house-of-gold

  • by saleps
    24 Jan, 2024

    Great and smart thermostat will save its users money..

    The Emerson Seni Smart thermostat works well and is easy to program from my smartphone.

    Verified purchase: YesCondition: NewSold by: benjwashi_3729

  • by wadegblakey
    05 Jul, 2025

    Best Smart Thermostat

    The Sensi Smart Thermostat is the best all-around smart thermostat available. Easy to install and setup. Easy to program schedules. Great intuitive App. Easy to override manually for non- techies.

    Verified purchase: YesCondition: Pre-ownedSold by: alexnew-23

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