Best Thermostat 2021 Reviews

best thermostat 2017

As the winter chill starts showing the early signs, the people rush to get the thermostats. There are several brands in the market, but the consumer is concerned about the top-rated thermostats available. Mostly the buyers prefer getting an affordable thermostat for home. To get the best wifi thermostat or the programmable thermostat programmable thermostat, it is essential to go through the comparison of the top 10 thermostats in 2015 and then in 2016 and now the best thermostat 2021. Now when every single gadget is using the smart technology, the situation is not much different in the case of thermostats. The consumers can enjoy a wide variety of smart thermostat 2021. To acquire the best digital thermostat, one must check the thermostat reviews available online.

The heating system has become an essential for all domestic premises. Most of our houses are now installed with the heating systems that regulate the interior temperature according to the external weather conditions. Apart from temperature regulation, it is important to keep an eye on the power consumption by the heating system. To avoid unnecessary power consumption, thermostats are installed along with the entire system that switches on and off the system when required. The thermostats are fitted with a device that senses the temperature alterations and then responds accordingly. Once the temperature comes to the necessary level, it turns off. The design of the heating system determines that how quickly the temperature can rise.  To save the energy, it is suggested that the thermostat must be adjusted at the lower temperature.

If you are planning to get a thermostat in the near future, the following list of thermostats can be helpful in deciding on the final choice. By comparing the following top ranking thermostats, you can buy the one according to your needs and budget.

Best Thermostat 2021 Comparison

ProductsWeightBattery (Included)Price
Ecobee3 Wi-Fi Thermostat1.35 pounds1 CR2 battery
Emerson Sensi Wi-Fi Thermostat 1F86U-42WF 0.5 pounds2 AA batteries
Honeywell RET97B5D1002/U Wi-Fi1.3 pounds1 Lithium Polymer battery
Honeywell RTH9580WF Smart Wi-Fi0.5 poundsNo Battery
Nest Learning Thermostat 3rd Generation1 pounds1 Lithium Polymer battery
Nest Learning Thermostat, 2nd Generation 1.62 pounds1 Lithium Metal battery

Featured Thermostat Reviews 2021

1)Ecobee3 Wi-Fi Thermostat with Remote Sensor
Ecobee3 Wi-Fi Thermostat with Remote Sensor

It becomes challenging for those having large homes to maintain temperature equilibrium in all the rooms.  It is often witnessed that the kitchens in such multi room homes are too warm while the bedroom at times becomes too cold to have a comfortable night.  Many conventional thermostats had these drawbacks.  Ecobee3 the smarter Wi-Fi thermostat with the remote sensor is easy to use a wireless thermostat that works with the help of a remote rendering the right temperature to every room in the home.  This internet thermostat is intelligent enough for the home automation of the heating system installed domestically. After learning about its key features and the working, one love to get it for the home. It is the qualities that made it stand out among similar products in 2016.

If being a consumer, you are looking for the answer to your question that what is the best thermostat. Then the first answer is that it must guarantee reliability in cheap rates. Ecobee 3 is not just cheap but is also a great saving machine. It offers a 23% saving on an average. Including those related to the energy.

It is a user-friendly device. It is easy to install. The automated setup process along with the 3.5-inch full-color LCD touch screen and the 320 x 480-pixel display make it a handy gadget. The manufacturers have ensured that even a beginner finds it easy to handle.  The Ecobee 3 is networked by the z-wave system that makes it a standout among the top ranking HVAC thermostat.


  • Can be attached to the Alexa device to maintain vocal controls.
  • Operates with the help of the remote sensor
  • Remote sensors ensure comfortable temperature in each room.
  • HVAC can be controlled from a distance with the help of the mobile apps available.
  • Weather display option is also there.

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  • Comes with the possibility of automated alerts and reminders
  • The related software can be easily upgraded
  • The consumer can get the regular home IQ energy report.
  • No need to pay monthly fees
  • Three years warranty.


  • A 2 to 3-degree rise is always seen on the central thermostat making it difficult to learn about the actual shift in temperature.
  • Not much ventilation space in case of the wall mounted thermostat.
  • Gets hot when the air conditioner is working.
  • The user manual is complicated to understand.
  • The installation requires professional help.


With minor operating errors and faults, it still cannot be sidelined because of the extraordinary working performance. It is because of this outclass performance that it is rated 4.3 out of 5 on Amazon. It is a real gift for those, who are tired of getting separate thermostats for each room. With the remote sensor, it becomes a child’s play to have an immediate control on the temperature of all rooms. Ecobee 3 is a real innovation in the recent times.

2)Emerson Sensi Wi-Fi Thermostat 1F86U-42WF for Smart Home
Emerson Sensi Wi-Fi Thermostat 1F86U-42WF

No matter whether you are at your home or away, the Emerson Sensi is a handy option with a good design and great features to control the temperature of your entire home. It also makes it possible to schedule the system as a whole. At the time of installation, it does not require extra wiring. It works great with the wiring already existing in your premises. It is supported by readily available mobile apps. These mobile apps also work as a guideline for installation and use, thus not putting you in any complicated manual readings. This Sensi thermostat can be scheduled for a limited usage of 15 minutes to an extended period of 7 days or more. This all can be handled with the help of any electronic gadget like a mobile phone, iPhone, tablet, or even your PC. Thus, in the shape of Emerson Sensi you can get a reliable wifi controlled, app controlled and phone controlled that can work well as the ac thermostat too.  If you are looking for an excellent touch screen thermostat for the Smart Home then, undoubtedly Emerson Sesi is one of the highest rated, remote control thermostats that work amazingly as an effective energy saver.

If similar products are compared, then this little temperature expert will prove its worth among the wifi enabled, automated thermostats.


  • Easy to schedule the temperature control system on a daily basis.
  • Temperature control by +/- 1 degree.
  • Clear and crisp display monitor for time, internal and external temperature and the status of the heating system.
  • Temperature degrees can be altered between Fahrenheit and Celsius scale.
  • WiFi control of all kinds of settings.
  • Permanent on-unit memory

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  • Reasonably less price as compared to its competitors.
  • Does not require additional C wire.
  • 3 years warranty
  • Possible to keep checking the temperature difference and the weather condition through the display.
  • Comes with a humidity sensor too.
  • Safe to use in homes with kids due to PIN lock out.


  • Lacks essential geo fencing features like geofencing and motor sensor technology.
  • Auto scheduling option is missing.
  • Display is not colored.


Excellent functionality, reasonable price, and user-friendly features are a plus point that supports the White-Rodgers 1F86U-42WF Emerson Sensi as a great Wi-Fi thermostat option that gives the user the best of everything. It has proved its worth for all those who have bought it. The reviews reveal an above average performance. It is highly satisfying when the design, installation, and usability are under consideration. The strongest standpoint in its favor is that it can be controlled even when the user is not close to the thermostat. It can be operated through the apps that can be installed easily on the phone, iPhone, or any other system. To sum up, there is no doubt about the worth of its outclass simplicity and ease.

3) Honeywell RET97B5D1002/U Wi-Fi Programmable
Honeywell RET97B5D1002 U Wi-Fi
Touchscreen Thermostat

A digital device to regulate the temperature of a particular area that is being run by a heating system is referred as the simple thermostat. With the changing times like other systems the thermostats are also becoming more intelligent and hi tech. This technology no more requires the physical closeness of the user. The user can now easily stay connected with the home temperature control through the WiFi or app operated thermostats. These thermostats available these days come with a sensor. These sensors not just monitor but also control the temperature according to the desired settings.

Like the traditional entry-level thermostats, Honeywell thermostat uses the simple LED panel. The black letters and numbers are easy to read against the green background.  It is a superb integration of the traditional and the modern style.  Programmable thermostats are becoming a recent phenomenon. They are installed with the Bluetooth and their working in many brands is internet based. These are the most common features in Honeywell RET97B5D1002/U Wi-Fi Programmable Touch screen Thermostat. The 7-day timer can control 4 timing cycles in 24 hours. The best option provided by Honeywell in this thermostat is that in case of any disconnection from the device the user gets alerts via his mobile number. The changing of air filter is also notified through the alerts.


  • Made out of high quality imported plastic.
  • Has a manageable size of 6 x 12 inches.
  • Helps in viewing and controlling the home temperature from remote places.
  • Display for real-time clock
  • Requires WiFi and the web browser for the initial set up.

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  • Goes well with all kinds of heating and cooling systems.
  • Comes with a Smart Response system to adjust to the preset temperature as soon as possible.
  • Touch screen display
  • Can be operated with all kinds of mobile gadgets.
  • The related software can be downloaded and updated easily.


  • Weak WiFi connectivity.
  • App is not supported by handsets.


The Honeywell Touch screen Thermostat is a budget friendly digital device to keep an eye on the temperature of your home. It not just saves your purchase money but also contributes in saving the extra money you spend by paying the energy costs.  After little hassle while installation, nothing seems difficult. This white temperature control box is stylish and simple that asks for less energy but renders the best results. It is a superb combination of the basic features and the modernism.

4) Honeywell RTH9580WF Smart Wi-Fi 7 Day Programmable
Honeywell RTH9580WF Smart Wi-Fi 7 Day
Color Touch

Computerized thermostat is becoming popular day by day. With every passing day, the users prefer getting the systems that are remotely accessible to operate the systems installed in the homes.  All such versions of the thermostats are fitted with the remote sensors.  If you are looking for a reliable thermostat for your domestic temperature settings, then it is important to go through the thermostat ratings of the top ten thermostat options available in the market. Among these high rankers, the brand name Honeywell is a renowned one. Kudos to the Honeywell that has provided with the most accurate web controlled thermostats.

This smart learning thermostat known with the product name Honeywell Wi-Fi Smart Thermostat, can look after the temperature system with the help of any kind of electronic device by sitting away from your home. These controlling devices include iPhone, iPad, Android and even a computer. The programming options are flexible enough to meet the choice of the users. It is because of this unique feature that the Honeywell RTH9580WF Review suits both domestic and business setting. In a business interiors the temperature control program can be chosen, when the business is not operating properly.  This Honeywell magic is great in all kinds of extreme weather conditions ranging from intense summers to chilly winters. The thermostat works amazingly even in the different parts of the day.  This all is carried out with the help of the Smart Response Technology that guarantees 24-7 Comfort. This battery powered features the alert system too, which transmits the alteration alerts when required.


  • Comes with the humidity control
  • Voice controlling is also possible after getting attached to the Alexa device.
  • Remote accessibility is possible with the help of iOS and Android devices.
  • Programs of personal choice can be selected for energy saving option for the whole year.
  • The lock touch screen system guarantees security and convenience.

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  • Customized programming option.
  • Can operate in all kinds of interiors and according to the individual routine patterns.
  • Screen colors can be changed according to the surrounding décor and the light levels.
  • Does not occupy too much space, instead protrudes less than 1” from the wall.
  • Comes with multiple language options.


  • Display screen is too congested with the letters, and numbers.
  • External body id covered with the plastic.
  • Overly busy-looking display
  • Body is completely covered with plastic.


The Honeywell RTH9580WF is in the market for last 2 years and is being acclaimed for the ease of all kinds ranging from the set up to the regular operation. With minor technical faults, there is nothing problematic.  It is a stylish way of keeping the temperature according to the needs and the choices of the user. The energy saving option has hardly any match. It is very comfortable to operate the onscreen interface.

5) Nest Learning Thermostat 3rd Generation
Nest Learning Thermostat 3rd Generation

Nest is the name of reliability and trust. It is an excellent choice for the home lovers who want to stay at ease in the home with comfortable temperature settings. Nest Learning Thermostat is great controlling device that maintains the high and low temperatures. No matter where you live, it easily adjusts to the surrounding climatic conditions. Many users ask the question that can nest control humidity. The answer to the question is a yes. It has proved its worth as a great Wi-Fi thermostat and the Bluetooth thermostat that resolves all temperature related concerns. This outstanding creation by Nest can work effectively when combined with various heating units like forced-air furnaces, heat pumps, dual-fuel systems and radiant heaters.  Thus, it is neither the surrounding nor the kind of equipment being used; the Nest creation itself is powerful enough to deal with the temperature changes.  Unlike traditional one-stage heating systems, Nest Learning Thermostat, 3rd generation copper review 2021conserves and saves energy in a much more efficient way. It successfully learns the program schedule and then alters the temperature accordingly. The unique auto change over function switches from the heating and the cooling system. It is one of those thermostats that do not require c wire. There is no need to worry about the bill if the kids accidentally switch on the Air Conditioner. It is an excellent option for a mobile home that shows a strong bond between the cost and price. Those who are looking for a carrier thermostat for sale cannot ignore this  Nest creation.

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Nest learning thermostat Review 2021

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  • With auto scheduling feature it is possible to create a schedule for one complete week.
  • In space, it turns down automatically to save the energy.
  • Can be reached from remote places through WiFi, androids, and laptops.
  • Eye catching display to exhibit the weather, temperature and time.
  • Saves energy half time more than the other temperature devices.
  • The Nest Leaf option helps in choosing the right temperature

Energy History: Check your Energy History in the Nest app to see how much energy you use and why.


  • Keeps record of the energy history.
  • Sleek and stylish thermostat to meet all décor.
  • Can be set up and installed conveniently.
  • Supported by easy to use apps.


  • Comparatively expensive than other thermostats
  • Auto away feature starts operating even when the residents around.


The Nest Learning Thermostat is a brilliant way to deal with the temperatures. It has the answers to the needs and requirements of those who love to have a high tech home or business attire. Whether you are using the heaters or the air conditioners, Nest has ensured the maximum energy saving through the magical operations of its Learning Thermostats. The users can conveniently cut down their energy bills with the assistance of the interactive programming and online management.

6) Nest Learning Thermostat, 2nd Generation
Nest Learning Thermostat, 2nd Generation

Nest is the name of trust and reliability. It is the name behind successful energy saving. With the increasing prices of energy sources all over the world, the vigilant house owners and the business runners look for the most reliable ways to keep control over the energy according to their choice. With all these concerns along with the query that how to operate the thermostat with five ten connection encouraged the technicians and experts of Nest to introduce the world to the Nest Learning Thermostat. It is not less than an intelligent student who is programmed to learn from the teacher and then act accordingly when the situation calls for a swift action. Nest has added remote range accessibility through the electronic devices like phone, tablet, or laptop. Those who have used the Nest thermostat have claimed that they have saved  10-12% on heating and 15% on cooling.

Encased in the durable steel casing this carrier infinity wifi thermostat price does not seem much higher as compared to its features and the saving characteristics. There is no need to worry about the voltage too as it works efficiently with 95% low voltage. Besides giving him the directions, it also works well itself. Remote access further ensures extra energy saving. This battery operated wifi thermostat is a great competitor of Emerson. It is no more difficult to understand where to buy it. It is readily available in the market as well as from the online sources. Read here Nest learning thermostat, 2nd generation Review 2021


  • Can save energy automatically as well as with auto-scheduling by the user.
  • Takes not more than half an hour for installation.
  • 20 percent is thinner than the first generation of the Nest thermostat.
  • Saves energy by automatically turning off in the absence of the user.
  • Makes it possible to control the system from the distant places due to the WiFi connectivity option.


  • Elegant looks to match your interiors and your style.
  • Can sense the wires and configures automatically with the system.
  • Can control an extensive range of HVAC systems, like 4 stages of heating, 2 stages of cooling, dual fuel systems, and humidification/dehumidification.
  • Efficient customer service system.
  • Equipped with energy reporting system.


  • Fitted with less reliable controlling device called FETs (Field Effect Transistors).
  • Users consider it as a power stealer.
  • Ineffective functioning of -“Heat Pump “
  • Not effective with the multi-stage
  • Does not come with a hold mode.


Nest is a name of trust and reliability. The second-generation thermostats are better than the previous one but as compared to the third one, it has certain loopholes and inadequacies, but despite this it works well in all kinds of heating systems giving you the temperature adjustment options according to your need and choice. The easy to handle features make it a household name.

7) Lux Products GEO-BL 7-Day Programmable Wi-Fi Thermostat, Works with Alexa, Geofencing Capable, White – Built-in Geofencing to Automatically Save Energy

Lux Products GEO-BL 7-Day Programmable Wi-Fi Thermostat can be installed vertically or horizontally; the display adjusts accordingly to make bi-directional mounting hassle free. This feature of GEO-BL 7-Day Programmable Wi-Fi Geofencing Capable Thermostat is a big plus as far as appeal is concerned this gives you more control as to how you want your LUX/GEO to look on the wall.

Lux Products GEO-BL Wi-Fi Thermostat automatically sets time and date when it connects to the internet. Lux Products GEO-BL 7-Day Programmable Wi-Fi Thermostat also features an air filter monitor. It is also compatible with Alexa so that you don’t even have to press a button on your smart phone to operate your thermostat. Alexa device is sold separately and connects with the LUX/GEO thermostat, this will give you the power to talk to your thermostat and give commands verbally. Lux Products GEO-BL 7-Day Programmable Wi-Fi Thermostat, Works with Alexa, Geofencing Capable, White comes with 3 year warranty so you can invest it in without worrying about getting your money wasted on something that doesn’t work for you. 

Lux Products GEO-BL 7-Day Programmable Wi-Fi Thermostat Features

  • Easy installation and Wi-Fi connection
  • Comes with Alexa for voice control
  • Geofencing option with settings
  • Free iOS or Android App
  • Selectable Fahrenheit/Celsius setting
  • Low battery detection
  • Air filter monitor
  • Can work on 24V C-Wire, 2 AA Lithium batteries or micro-USB


  • No assistance is required to program it.
  • Lux GEO-BL Wi-Fi Thermostat saves over-consumption of energy
  • Its smart wheel helps you adjust the temperature as per your need
  • You can program the thermostat for 7 days
  • Can be operated with or without Wi-Fi
  • A large display on the unit to monitor temperature
  • Lux GEO-BL Wi-Fi Thermostat indicates too low or too high temperature
  • Lux GEO-BL Wi-Fi Thermostat pack includes 2-AA lithium batteries


  • You have to note by yourself when the batteries will expire. There’s no instruction from the manufacturer about it.


Opting for Lux GEO-BL Wi-Fi Thermostat is enormously advantageous for any homeowner for easing the task of adjusting temperature and save energy from being over-consumed. Lux Products GEO-BL Wi-Fi Thermostat is easier to install and operate. You can adjust temperature for the upcoming seven days and regulate the temperature or close the device just by clicking your cell phone keypad. You need only to install iOS or Android App that is free of charge. Lux Products GEO-BL Wi-Fi Thermostat is a fantastic device in every respect.

8) Bosch Connected Control BCC100 Thermostat – Save Energy

Bosch BCC100 Connected Control Smart Phone Wi-Fi Thermostat – Compatible with Alexa is out of the box touchscreen based device to save money by maintaining temperature as per the program set by you. It works the best with a number of HVAC systems such as gas and electric furnaces, heat pumps and the like.

Bosch BCC100 Wi-Fi Thermostat has a user-friendly interface that makes navigation easy and trouble-free. Its 5-inch full color touch screen is very responsive and clear. Many thermostats out there don’t have a touch screen which makes operation difficult. Bosch Connected Control BCC100 Thermostat’s touchscreen makes it very inviting and easy to use. Bosch BCC100 Wi-Fi Thermostat also gives extreme temperature alerts. It alerts the user when the temperature climbs too high or falls too low.

Installing Bosch BCC100 Connected Control Smart Phone Wi-Fi Thermostat by yourself is a pocket friendly idea and Bosch makes sure that you can do that perfectly. Bosch thermostat comes with clear instructions and videos to help you through the process. The installation steps are simple and clear, this comes as a very big plus because not being able to install the thermostat yourself creates a lot of trouble.  Bosch Touch Screen BCC100 Connected Control Smart Phone Wi-Fi Thermostat is compatible with Alexa device. You can buy the Alexa device from Amazon and follow simple steps on your Alexa app to connect it to your thermostat. This way you won’t even have to use your phone to change temperature or modes.

Bosch BCC100 Thermostat Features

  • User-friendly Interface
  • Can be installed without assistance
  • Amazon Alexa-enabled
  • Wider Color Touchscreen
  • Programmable Thermostat
  • Can be operated from smartphone or tablet through Wi-Fi
  • Can control any humidifier or dehumidifier effectively
  • Temperature Alerts
  • 5-year warranty


  • Best option to save both energy and money
  • Capable of maintain temperature automatically, once programmed by you
  • Sends temperature alerts when it is too high or too low
  • Comes with a large touchscreen with an extensive menu
  • It can successfully control humidifiers and dehumidifiers
  • Easily affordable thermostat


  • App does not support Geofencing and smart home devices


Bosch BCC100 Wi-Fi Thermostat is a features-packed device, known also as the “budget” smart thermostat that is capable of controlling the consumption of energy and saving your precious money. The thermostat can be programmed as per your requirements. Bosch Connected Control BCC100 Thermostat can also be operated from your smart phone and tab. You receive temperature alerts at your handy devices and can regulate temperature accordingly.