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The Best Smart Thermostat | Complete Buying Guide

Ever got home and find your heating has been running throughout the day, or find your home is freezing? If that is the situation, it is time to invest in smart thermostat. These IoT devices link to the internet and allow you to control the temperature from your smartphone or laptop, no matter where you are. Even goes further, the very best smart thermostat can learn your schedule and adjusts the temperatures accordingly.

Why buy a smart thermostat?

According to the U.S. Department of Energy, smart thermostats are going to have an outsize impact not only on how comfortable you are in your home but also on your overall spending budget. Heating and cooling your home accounts for almost 50% of most home’s utility bills.

You can save as much as $180 in energy bills per year when you program the thermostat with a heating and cooling schedule, according to Energy Star.

The U.S. Energy Information Administration found that less than 20 percent of Americans with heating and/or central air conditioning actually program their thermostats— which implies the vast majority of us are missing out on potential savings.

Our research found that most smart thermostats are able to keep rooms around the set temperature, therefore we now concentrate on 4 key aspects: setup, ease of reading the screen, programming, and operation.

Below are the 7 best smart thermostats that will automatically heat and cool your home and save you money.

1. The best smart thermostat overall: Nest Learning Thermostat

The Nest most-advanced smart thermostat gets smarter with added new features such as a larger display, better resolution, geofencing support, energy reporting, a furnace monitor, and a built-in motion sensor that can detect if anyone is home or not. This feature helps lower your bill by never heating an empty house.

It works with Google Assistant, third-party support, and voice commands via Apple Home kit and Amazon Alexa. It installs easily (if your system is compatible). Even though it lacks remote room sensors, it does works with different smart home devices and the IFTTT Internet service

Bottom line Google Nest is an elegant smart thermostat, and it offers more smart home integrations. All this earns it our Editors’ best smart thermostats 2021.

2. Best high-end smart thermostats: Ecobee Thermostat

If you are tired of standing up to change the heat all the time, we suggest the Ecobee smart thermostat. Because it makes use of voice control technology, you do not need to use an app on the phone. It has an outstanding app and intuitive programming, built-in Alexa, and a speaker with good sound quality. It also works with almost any smart home devices.  

When installed, this costly, smooth-looking smart thermostat looks over temperature, humidity, and energy consumption with much less headache. The Ecobee Smart Thermostat with Voice Control is full of features like Alexa assistance, a touch screen, a remote space sensor, and compatible with lots of other smart home devices.

It has an outstanding app and intuitive programming, built-in Alexa, and a speaker with good sound quality. In case you need the upgraded version, however, you can save money by going with the Ecobee3 Lite.

Read our full ECO BEE 4 Review

3. Best affordable thermostat for smart control: Honeywell Home T5+ Smart Thermostat

Among the most affordable smart thermostats out that is quite functional. App control from a cell phone, compatible with Alexa, and has geofence. The geofence automated your home and away settings every time with less hassle, and it sent prompt notifications alerting you of the changes.

Wi-Fi thermostats, like the Honeywell Smart Thermostat, were originally used by those that wanted to be updated if their heater stopped working when they are out of the house. However, they’ve now become a standard for people with busy schedules. They connect to your home’s Wi-Fi service and allow you to adjust the temperature from the mobile app.

If you need a basic smart thermostat, the Honeywell T5+ might be all you need. It’s good design, easy to use, and can be controlled with an app.

4. Best baseboard Thermostat: Mysa Smart Thermostat

The Mysa Smart Thermostat is a solid and stylishly designed thermostat with high voltage heaters. It’s the one smart thermostats available for electric baseboard heaters. It is controlled via the Mysa App, and also it efficiently monitors your humidity and heat. We still think it’s the perfect line voltage smart thermostat of 2021

It is also compatible with a fan-forced convector, self-contained hydronic baseboard, and radiant ceiling types. Mysa’s device is particularly in comparison to Sinopé Smart Wi-Fi Thermostat but Mysa Thermostat is far more solid than Sinopé’s products, and no additional-cost bridge is required to connect to your Wi-Fi network.

All that said, it is an excellent high-tech thermostat without being overly distracting. Expect a reliable WiFi connection along with a simple, smooth experience.

Note: Confirm if you’ve got a line-voltage heating system.


  • Easy to schedule
  • Easy-to-use mobile app
  • No Extra hubs required
  • Elegant industrial design
  • Compatible with Amazon Alexa, Google Assistant, and Apple HomeKit


  • No native geofencing
  • For electric heating only

5. Best non-programmable thermostat: Emerson 1F83C-11NP Non-programmable Thermostat

The Emerson electronic non-programmable thermostat with a bigger easy to read digital display for simple control of your heating and cooling system. It has an accurate temperature control of 45-95 degrees. and features a streamlined configuration menu, a built-in indicator, and pluggable terminals for easy installation

It’s compatible with a heat pump system along with a standard furnace/air conditioner split system and is made to work with existing wires. With flexible programming and dependable performance, Emerson 1F83C-11NP Conventional (1H/1C) Non-Programmable Thermostat is the perfect fit for every home device.


  • Compatibility-baseboard heater
  • Simple setup menu
  • Easy to read digital display
  • Built-in level indicator
  • Accurate
  • Affordable


  • Blade type terminal connection is apt to damage
  • No automatic changeover from Heat to AC

6. Best smart controller for those with window units: Sensibo Sky alternative Smart Air Conditioner Controller

If you like all of the comforts of a smart air conditioner without needing to change your old air conditioner, the Sensibo Sky Controller is the one solution. It turns your old AC into a smart air conditioner provided you’ve got a compatible air conditioner, the Sensibo adds a great deal of functionality for half the cost of a straight-up upgrade

A low cost, simple controls, and a wide range of smart-home integration make the Sensibo Sky Smart Air Conditioner Controller practical addition to your air conditioner. Plus, Sensibo’s app is pretty clean, friendly, and robust on its own. We think it is the best smart thermostats for those with in-wall or window units that have IR remotes.


  • Easy to set up
  • Works with various types of AC.
  • Alexa, Google Assistant, and IFTTT compatibility
  • Supports geofencing and has robust scheduling.


  • No controls or display on the device
  • Only works with window air conditioners that have IR remotes

7. Best smart multi-zone heating system: Drayton Wiser Smart Heating Room Thermostat

We looked at the Drayton’s Wiser one-channel kit, which includes a boiler switch, two radiators, and a wireless thermostat. Impressively, this costs £179, which is less expensive compared to some thermostats-only kits. It’s the very best you can buy; however, it wasn’t quite as fast as our overall best smart thermostats at switching the heating on or off, but it is self-learning and adjusts the schedule to reduce energy waste.

It features an open-window detection that switches the heating off if a draught is detected and there is a geofence that turns the heating on or off based on your phone’s location.

All things considered, anyone that wants a little more control may find the Wiser a solid heating system that gives good detail. but for those that just want high-end heating at a great price, there’s little need to look at our other picks


  • Great value
  • Simple controls
  • Clean and friendly app
  • Compatible with Google Assistant and Amazon Alexa


  • No geofencing support
  • Basic app control

How to Choose a Smart Heating Thermostats – A Complete Buying Guide

Smart thermostats are made different and with different functionalities. That said, not all of them will allow you to control both your central heating and your hot water. Here are some features to look for when buying your smart thermostat for your home according to the Which

Smart thermostats feature to look out for

Geofencing: Since you are most going to manage your thermostat from your phone or laptop. The app lets you create a geofence, that can monitor when you are inside the house or have left for work and switch the temperature to an energy-saving setting.

Remote Access: With a smart thermostat, it’s possible to adjust settings with the use of a thermostat app on your phone or computer from anywhere, depending on your changing schedule.

Motion and Proximity Sensors: A smart thermostats with a proximity sensor will turn the heating on in a room immediately you enter. It’ll also dim when you walk away from the dashboard and light up again when you are within range.

Learning: Being smart, your thermostat learns your schedule and adjusts automatically to your needs and temperature requirements, so you do not have to program it yourself

Simple Installation: Many of the smart thermostats on the market offer a simple installation you can do yourself. All the smart thermostats we reviewed also include detailed installation instructions or video walkthroughs to make the process easier. Check if your thermostat requires a common wire or a C-wire and if in doubt, call professional heating specialists to help you with the fitting.

If You Know You Don’t Have a C-wire, You Have a Few Options:

  • Choose a model with a power adapter or power extender that allows you to add a C-wire to your system, like Nest or Ecobee Thermostat.
  • Buy and install a third-party add-a-wire adapter.

Multi-room control or zonal heating: If you have extra rooms you don’t usually frequent or warmer in the bedroom and cooler in the living room, zonal heating will allow you to do this.

Weather-responsive and Traffic Update: This feature will check and displays weather conditions and traffic updates and also adjust the temperatures accordingly

A Word About Installation

Most nonconnected thermostats can be wired very easily into your cooling and heating system. Just take a picture of the wired link on your present thermostat so that you know that wires go where and link those wires on the corresponding ports on your brand-new thermostat. Many smart thermostats will additionally include comprehensive installation instructions or maybe video walkthroughs to help make the process simpler, according to Consumerreports

TIP: Install a thermostat on an interior structure that is centrally located, and away from other sources of vents, direct sunlight, or drafts, that may give false readings.

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