8 Best Smart Thermostats

gray Nest thermostat displaying at 63

OptimalPad is reader-supported. When you buy through links on our posts, we may earn an affiliate commission.

Smart thermostats are quite possibly the most important smart devices you can add to your smart home, regardless of whether you rent or own. Sure, smart light bulbs that you can command on and off by voice are convenient, and smart locks let you open or close that door anywhere. But the best smart thermostats aren’t just convenient, they can save you a large amount of money on your utility bill for as long as you live in your home.

We’re here to help you find the most efficient for you. We’ve rounded up the best smart thermostats there are on the market.

1. Best Smart Thermostat: Google – Nest Learning Thermostat

Top Features:

  • Easy installation
  • Auto-scheduler
  • Energy-saving

Technical Details:

  • Color option: 7 options
  • Control method: App, voice
  • Warranty: 2 years
  • Weight: 1 pound
  • Dimensions: 3.3 x 3.3 x 1.21 inches

The Google – Nest Learning Thermostat is a smart thermostat that learns your schedule and programs itself to help save energy. You can control it from anywhere with the Nest app, and it works with Alexa and Google Assistant so you can adjust the temperature with your voice. It is beautifully designed, with a big, bright display and metal finishes to suit any style.

Most of the reviewers say that it is a good thermostat with lots of neat features. It is a smart and innovative upgrade to your home.

A few reviewers complained that they won’t replace defective units. Some say it is not for cold climates.

The thermostat’s dimensions are ‎‎3.3 x 3.3 x 1.21 inches. It weighs ‎‎1 pound.

View Google – Nest Learning Thermostat on Amazon.

2. Best Value Smart Thermostat: Google – Nest Thermostat

Top Features:

  • Quick schedule
  • HVAC monitoring
  • Easy to use

Technical Details:

  • Color option: 8 options
  • Control method: App
  • Warranty: 1 year
  • Weight: 5 ounces
  • Dimensions: 3.31 x 3.31 x 1.07 inches

The Google – Nest Thermostat is designed to work without a C wire in most homes. It turns itself down when you leave, so you don’t waste energy heating or cooling an empty home. It lets you create an energy-efficient schedule in the Google Home App on your Android or iPhone.

Most of the reviewers say that it works really well and has a sleek design. The App is great for scheduling and monitoring usage.

A few reviewers complained that the product comes with no instructions. Some say that C wire is a must, to complete the setup.

The thermostat’s dimensions are ‎‎3.31 x 3.31 x 1.07 inches. It weighs ‎‎5 ounces.

View Google – Nest Thermostat on Amazon.

3. Best Budget Smart Thermostat: Sensi – Emerson Smart Thermostat

Top Features:

  • Remote access
  • Usage report
  • HVAC compatible

Technical Details:

  • Color option: None
  • Control method: App, voice
  • Warranty: 3 years
  • Weight: 13.6 ounces
  • Dimensions: 3.75 x 5.88 x 1.1 inches

The Sensi – Emerson Smart Thermostat makes it easy to remotely control and schedule your home comfort anytime, anywhere. The intuitive app walks you through each step of the installation with custom configured instructions, removing all the frustration and guesswork from the installation process, so you can be up and running in no time, no experience required.

Most of the reviewers say that it is worth the price and works with google assistant. The thermostat looks slick and the app looks nice too.

A few reviewers complained that it doesn’t work on 5G Wi-Fi. Some say it is not stable even if the Wi-Fi is near.

The thermostat’s dimensions are ‎‎‎3.75 x 5.88 x 1.1 inches. It weighs ‎‎13.6 ounces.

View Sensi – Emerson Smart Thermostat on Amazon.

4. Best Touch Screen Smart Thermostat: Sensi – Emerson Touch Smart Thermostat

Top Features:

  • Touchscreen
  • Remote access
  • Smart alerts

Technical Details:

  • Color option: 3 options
  • Control method: App, voice
  • Warranty: 3 years
  • Weight: 1.2 pounds
  • Dimensions: 3.4 x 5.63 x 1.17 inches

The Sensi – Emerson Touch Smart Thermostat puts comfort, control at your fingertips whether you are at home or on the go. Just a tap of the easy-to-use touchscreen display or free mobile app lets you remotely access, change or program your home temperatures.

Most of the reviewers say that the app is very intuitive and is really where you should do all your settings and adjustments. The customer support is also outstanding.

A few reviewers complained that the App has bugs. Some say updating the firmware gives problems too.

The thermostat’s dimensions are ‎‎3.4 x 5.63 x 1.17 inches. It weighs ‎‎1.2 pounds.

View Sensi – Emerson Touch Smart Thermostat on Amazon.

5. Best Multiple-Room Smart Thermostat: ecobee – 4 Smart Thermostat

ecobee4 Smart Thermostat with Built-in Alexa, Room Sensor Included
Easily adjust your thermostat from wherever you are.

Top Features:

  • Room sensor
  • Built-in Alexa
  • Voice assistant

Technical Details:

  • Color option: None
  • Control method: App, voice
  • Warranty: N/A
  • Weight: 1.87 pounds
  • Dimensions: 7.6 x 7.48 x 3.23 inches

The ecobee – 4 Smart Thermostat connects to your home’s wireless network and can be controlled remotely from other connected devices. This means that you can adjust the settings using your smartphone, an iPad, a voice assistant, or a computer. It has large digital displays that are designed to be seen from a distance, which is nice for anyone with low vision. 

Most of the reviewers say that it senses where you are and provides the temperature at that location. It works very well with an air conditioner.

A few reviewers complained that there is no backup or manual control to override when it goes offline. Some say the customer service and technical support were horrible.

The thermostat’s dimensions are ‎‎7.6 x 7.48 x 3.23 inches. It weighs ‎‎1.87 pounds.

View ecobee – 4 Smart Thermostat on Amazon.

6. Best Smart Thermostat For Air Conditioner: Sensibo – Sky Smart Thermostat

Top Features:

  • AC control
  • Saves energy
  • Easy installation

Technical Details:

  • Color option: 2 options
  • Control method: App, remote, voice
  • Warranty: N/A
  • Weight: 2.4 ounces
  • Dimensions: 3.23 x 2.17 x 0.67 inches

The Sensibo – Sky Smart Thermostat is compatible with all major voice assistants such as Amazon Alexa, Google Home, and even Apple Siri. It uses 7-day scheduling, geofencing, and filter cleaning alerts, Sensibo saves energy and reduces electric bills. It is quick and easy to install.

Most of the reviewers say that the App makes it super easy to manage both devices. Both have worked flawlessly and they highly recommend these little devices.

A few reviewers complained that it requires a subscription. Some say the setup doesn’t work smoothly.

The thermostat’s dimensions are ‎‎3.23 x 2.17 x 0.67 inches. It weighs ‎‎‎2.4 ounces.

View Sensibo – Sky Smart Thermostat on Amazon.

7. Best Remote Sensored Smart Thermostat: Honeywell Home – T9 Thermostat

Top Features:

  • Smart alerts
  • Wide coverage
  • Touchscreen

Technical Details:

  • Color option: None
  • Control method: App, remote
  • Warranty: 2 years
  • Weight: 1.43 pounds
  • Dimensions: 3.7 x 4.92 x 0.94 inches

The Honeywell Home – T9 Thermostat detects which rooms people are in and focuses comfort where it matters automatically. It utilizes a unique technology to deliver an efficient signal up to 200 feet range. Adjusts your thermostat from anywhere with your mobile device or set it using auto home and away scheduling.

Most of the reviewers say that it has scheduling, occupancy sensors, remote sensor, and geofencing. You’re bound to find a mode or combination of modes that will work for you. The overall quality is outstanding.

A few reviewers complained you cannot change the brightness of the display. Some say it is having trouble regarding connectivity.

The thermostat’s dimensions are ‎‎3.7 x 4.92 x 0.94 inches. It weighs ‎‎1.43 pounds.

View Honeywell Home – T9 Thermostat on Amazon.

8. Best Voice Sensored Smart Thermostat: ecobee – Smart Thermostat

ecobee SmartThermostat with Voice Control , Black
Live comfortably and save automatically.

Top Features:

  • Smart sensor
  • Alexa built-in
  • HVAC integrated

Technical Details:

  • Color option: None
  • Control method: App, remote, voice
  • Warranty: 3 years
  • Weight: 1.85 pounds
  • Dimensions: 4.29 x 4.29 x 1.1 inches

The ecobee – Smart Thermostat has an included smart sensor that keeps you comfortable where you are with occupancy detection. Place in your most important room to keep the temperature perfect. Uses voice commands to adjust the temperature, play music, ask for the weather, or make a call. Automatically pauses your HVAC system anytime a door or window is left open.

Most of the reviewers say that it has a very good audio quality. It looks similar to previous models but adds a lot of great new features. Automates your HVAC and saves a lot of energy costs.

A few reviewers complained that regarding connectivity issues. Some say that it is not versatile in terms of compatibility.

The thermostat’s dimensions are ‎‎4.29 x 4.29 x 1.1 inches. It weighs ‎‎1.85 pounds.

View ecobee – Smart Thermostat on Amazon.

Best Smart Thermostats Comparison Table

Product nameColor optionControl methodWarrantyWeightDimensions
Google – Nest Learning Thermostat7 optionsApp, voice2 years1 pound3.3 x 3.3 x 1.21 inches
Google – Nest Thermostat8 optionsApp, voice1 year5 ounces3.31 x 3.31 x 1.07 inches
Sensi – Emerson Smart ThermostatNoneApp, voice3 years13.6 ounces3.75 x 5.88 x 1.1 inches
Sensi – Emerson Touch Smart Thermostat3 optionsApp, voice3 years1.2 pounds3.4 x 5.63 x 1.17 inches
ecobee4 – Smart ThermostatNoneApp, voiceN/A1.87 pounds7.6 x 7.48 x 3.23 inches
Sensibo – Sky Smart Thermostat2 optionsApp, remote, voiceN/A2.4 ounces3.23 x 2.17 x 0.67 inches
Honeywell Home – T9 ThermostatNoneApp, remote2 years1.43 pounds3.7 x 4.92 x 0.94 inches
ecobee – Smart ThermostatNoneApp, remote, voice3 years1.85 pounds4.29 x 4.29 x 1.1 inches

Best Smart Thermostats FAQs

What are the advantages of a smart thermostat?

The advantage of a smart thermostat is its ability to learn a household’s patterns and adjust heating and cooling according to when a home is occupied or is about to be occupied. This reduces the use of heating and cooling systems when nobody is home for significant periods of time.

Is it worth it to buy a smart thermostat?

Smart thermostats can be more than worth it, for the right tenant or homeowner. They can help save money and energy, they can be completely customized to the user’s needs, and they can be controlled remotely. Yet, smart thermostats may not be right for everyone.

Do smart thermostats work without wifi?

A smart thermostat will work with no internet. Basic heating and cooling control will be the only features available.

Last update on 2020-09-29 / Affiliate links / Images from Amazon Product Advertising API