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Emerson Sensi Wi-Fi Smart Thermostat, ST55 Review

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By Best Choice team
Checked icon Last updated - May 10, 2025
9.3

Verdict overview

  • Smart Features 8.9
  • Easy installation 9.8
  • Temperature Control 9.6
  • Tech Support 9.1
  • integrate with Alexa 9.3
Pros
  • Easy DIY installation without a C-wire.
  • Energy savings with flexible scheduling.
  • Comprehensive smart maintenance alerts.
Cons
  • Possibility of frequent resets.

Tech specs

screen size5 Inches
colorWhite
importMade in the USA
backlightYes
assembly requiredNo
controller typeVera, Apple HomeKit, Google Assistant, SmartThings, Amazon Alexa
special featureFilter Indicator, Clock Display, Fan Control, Auto Changeover, Daylight Savings Time Ready
warranty description3 years.
control typeButton Control
display typeLED
customer reviews4.5 4.5 out of 5 stars 20,297 ratings 4.5 out of 5 stars
connectivity technologyWi-Fi
connectivity protocolWi-Fi
departmentUnisex-Adult
model nameWi-Fi Thermostat for Smart Home, DIY Version
product dimensions1D x 5.88W x 3.75H
shapeRectangular
batteries1 AAA batteries required. included
item weight13.6 ounces
specific uses for productBoiler, Heat Pump, Air Conditioner, Furnace
voltage24 Volts AC
control methodVoice
materialPlastic
power sourceCorded Electric
styleDIY
batteries requiredYes
mounting typeWall Mount
number of batteries1 AAA batteries required. included
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Product Overview

I recently purchased the Emerson Thermostats Sensi Wi Fi Smart Thermostat ST55 for my home. It was a great decision that I have not regretted since then. It has been easy to install and I have had no problems using it whatsoever.

The thermostat is ENERGY STAR certified, which means it can help you save energy with features like flexible scheduling, remote access, and usage reports. It also comes with a built in level and step by step app instructions for a quick installation. Whats more, it works with HVAC equipment found in most homes and common wire c wire is not required in most applications.

The Emerson Thermostats Sensi Wi Fi Smart Thermostat ST55 also provides privacy protection as it wont sell your personal information to third parties. It looks and feels like a traditional thermostat so you dont have to patch and paint your walls when installing it. And its temperature control is pretty accurate too!

Furthermore, this thermostat 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. You can also configure it with Alexa integration, Google Assistant, SmartThings, Homekit and even Vera for more convenience.

Overall, this product is perfect for those who are looking for an easy to install DIY thermostat that provides great energy savings without compromising on privacy or performance. Its features are top notch and it works well with many HVAC systems found in homes today. I would highly recommend this product to anyone who wants an efficient way to control their homes temperature without any hassle or difficulty.

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The secret behind our reviews

By Best Choice team

Best Choice Team is your go-to source for curated product recommendations across various categories. Leveraging years of industry experience and advanced AI technology, we analyze data from multiple sources to bring you the most relevant and up-to-date product lists.

Our AI-driven approach allows us to streamline the selection process, ensuring that the products we feature align with current market trends and consumer preferences. We aim to provide content that helps you navigate your purchasing decisions with greater ease Like.

Users reviews

93% of reviewers would recommend to a friend, Based on 40,594 Reviews

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