Emerson
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4,1 out of 5 ☆☆☆☆☆ ★★★★★
1677 reviews
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Sensi Lite Smart Thermostat, Data Privacy, Programmable, Wi-Fi, Easy DIY, Works With Alexa, Energy Star Certified, ST25, Most Systems C-Wire Not Required, Except On Heat/Cool Only and Heat Pump System Black

Smart Thermostats Have Never Been So Easy

Give your family’s comfort a smart upgrade. With the Sensi Lite smart thermostat, it’s never been easier. It all starts with a quick and simple installation—no common wire required with most systems*.

Our top-rated mobile app lets you manage your home’s HVAC from anywhere, anytime. Plus, your usage activity and personal data stays private. That’s the power of putting Sensi’s over 100 years of HVAC experience on your wall.

  • For full details, review the Sensi Privacy Policy under the “Products Documentation” section below.
  • Note: if you sign up for a program with a third party, such as a utility or controller, details and terms for that program are between you and the third party, not Emerson, and may include additional data collection.
  • Certain add-on services require additional data to operate as intended. These services are not required and are optional.
  • EASY DIY INSTALLATION: Do it yourself fast with a built-in level and simple step-by-step instructions. Works with the HVAC equipment found in most homes
  • COMMON WIRE REQUIREMENTS: Common wire(C-Wire) required for heat pump and heat/cool only systems. C-wire not required on most systems
  • SAVE ABOUT 23% ON HVAC ENERGY*: ENERGY STAR-certified and packed with features that help you save money, including flexible scheduling, geofencing, remote access and usage reports
  • PRIVACY PROTECTION*: Sensi won’t sell your personal information to third parties or leverage your thermostat activity data for targeting or advertising purposes
  • CONTROL FROM ANYWHERE: The top-rated mobile app for Android and iOS devices makes it easy to control your comfort from a smartphone or tablet
Brand ‎Emerson
Model Name ‎Sensi Lite
Product Dimensions ‎0.88"D x 5.07"W x 3.13"H
Controller Type ‎Amazon Alexa, Google Assistant, Hand Control, SmartThings
Special Feature ‎Auto Changeover, Daylight Savings Time Ready, Filter Indicator, Low Voltage, Programmable
Color ‎Black
Specific Uses For Product ‎Air Conditioner, Boiler, Furnace, Heat Pump
Temperature Control Type ‎Automatic or Programmable
Connectivity Technology ‎Wi-Fi
Included Components ‎(2) AAA Batteries, Installation Guide, Mounting Hardware, Sensi Lite Smart Thermostat, Wire Labels
Power Source ‎Battery or C-wire
Item Weight ‎0.3 Pounds
Voltage ‎24 Volts
Shape ‎Rectangular
Display Type ‎LCD
Finish Type ‎Simple
Control Type ‎App Control
Control Method ‎App
Connectivity Protocol ‎Wi-Fi
Mounting Type ‎Wall Mount
Style ‎Simple
Backlight ‎Yes
Specification Met ‎Energy Star
Number of Batteries ‎2 AAA batteries required. (included)
UPC ‎786710568732
Manufacturer ‎Emerson
Part Number ‎ST25
Item Weight ‎4.8 ounces
Item model number ‎ST25
Batteries ‎2 AAA batteries required. (included)
Size ‎0.88 x 5.07 x 3.13
Finish ‎Simple
Pattern ‎Thermostat
Item Package Quantity ‎1
Special Features ‎Auto Changeover, Daylight Savings Time Ready, Filter Indicator, Low Voltage, Programmable
Batteries Included? ‎Yes
Batteries Required? ‎Yes
Battery Cell Type ‎Alkaline
Warranty Description ‎3 years.
ASIN B0BXZ6KXGG
Customer Reviews 4.1 4.1 out of 5 stars 1,677 ratings 4.1 out of 5 stars
Best Sellers Rank #3,201 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #14 in Home Programmable Thermostats
Date First Available March 27, 2023
Brand Emerson
Model Name Sensi Lite
Product Dimensions 0.88"D x 5.07"W x 3.13"H
Controller Type Amazon Alexa, Google Assistant, Hand Control, SmartThings
Special Feature Auto Changeover, Daylight Savings Time Ready, Filter Indicator, Low Voltage, Programmable