Experts Analyzed 16 Smart Thermostats & Picked 5 Category Winners

Nowadays it is easier than ever to equip your home with a variety of smart devices that make your life easier and more comfortable. The possibilities range from voice-controlled personal assistants such as Alexa or Google Assistant to super smart home security systems. You can even connect your fridge to an app!

And when it comes to making your home as comfortable as possible, smart thermostats are the way to go. First, you can use it to automate the temperature levels in your home. It also saves you money by preventing your air conditioner from working when it is not needed.

A smart thermostat can tell if someone is home. It can also learn when to come home from work and when to go to sleep. With this information, a smart thermostat can control both your heating and cooling units to maintain your preferred home temperature.

More importantly, they do all of this exactly when you need it. This way you save a lot of energy that would otherwise be wasted. Convenience aside, this alone should be reason enough to buy a smart thermostat.

Comparison of the best smart thermostats

Best overall smart thermostat (price doesn't matter)

Best budget smart thermostat

Best looking smart thermostat

Best smart thermostat for energy efficiency

Best smart thermostat for multiple zones

Surname

Ecobee Smart Thermostat

Honeywell Lyric T5 Smart Thermostat

GLAS Smart Thermostat

Ecobee 3 Lite

Honeywell Home T9 Smart Thermostat

Short Summary

With loads of useful features, you can even use it as an Alexa speaker.

A very powerful device for its price, exceptional for geofencing.

With its clear glass display and well-designed user interface, it offers numerous functions and compatibility with other systems.

The full use of proximity sensors ensures that energy is never wasted.

With a free remote room sensor, this smart thermostat lets you control the temperature for each room separately.

price

$ 237.65 on Amazon

£ 178.43 on Amazon

$ 149.99 on Amazon

£ 112.61 on Amazon

$ 249.00 on Amazon

£ 187.36 on Amazon

$ 169.00 on Amazon

£ 127.28 on Amazon

$ 169.00 on Amazon

£ 127.28 on Amazon

SMARTHOME news

rating

4.7

4.1

4.0

4.0

4.2

Amazon rating

4.5

4.1

4.0

4.5

4.3

Average rating on Google

4.5

3.8

3.6

3.8

4.0

Intelligent learning thermostat

No

Yes

No

Semi-smart

Yes

Alexa voice

Yes

Yes

Yes

Yes

Yes

Google assistant

Yes

Yes

Yes

Yes

Yes

Geofencing

Yes

Yes

No

No

Yes

advantages

Improved support for multiple sensors

Acceptable speaker

Full Alexa support

Affordable

Geofencing

The display offers a whole range of information

The best looking smart thermostat

Big display

Compatible with Alexa and Google Assistant

Indoor air quality sensors

Compatible with remote room sensors

Acceptable price

Supports most smart home systems

Smooth design

Uses multiple remote sensors to create separate temperature zones.

Geofencing

User-friendly control panel

Comes with a free remote control sensor.

disadvantage

Quite large

There are no learning functions

No multi-zone support

No movement activation

Expensive

Cortana isn't the best for smart home management

Missing certain features at this price.

No geofencing

No real learning skills.

Cannot be integrated with other Honeywell smart devices.

Doesn't support Apple HomeKit

Best overall smart thermostat

WINNER: Ecobee Smart Thermostat

Ecobee Smart Thermostat

Out of all the competitors, Ecobee Smart Thermostat takes first place for Best Smart Thermostat You Can Buy Today. While it can be expensive, the list of features you get is impressive. You also get a remote room sensor and built-in speaker for full Amazon Alexa support.

Technical data overview

  • Quad core processor
  • Dual band Wi-Fi support for 2.4 GHz and 5 GHz networks
  • C-wire installation
  • Integrated speaker with full Alexa support
  • Display with a high quality glossy glass surface

properties

  • Multi-zone support with remote room sensors
  • Long-range microphone for better voice control
  • Works with Amazon Alexa, Apple's Siri, and Google Assistant
  • Smart home integration via Apple HomeKit and IFTTT
  • You can install it yourself

advantages

  • Full Amazon Alexa support via the integrated speaker
  • A good quality speaker
  • Comes with an improved room sensor
  • Compatible with most smart home systems
  • easy installation
  • Supports dual-band WiFi connections

disadvantage

  • More expensive than the competition
  • The ease of use of Amazon Alexa can suffer depending on the location of the thermostat

reviews

  • SMARTHOME News Rating: 4.7 / 5
  • Amazon rating: 4.5 / 5
  • Average rating from other websites: 4.5 / 5

Buy if you can

  • want the best smart thermostat regardless of the price
  • I want an Alexa smart speaker
  • have to control several rooms

Don't buy if you can

  • looking for a budget option
  • Already have an Alexa speaker and just need a smart thermostat

costs

Second place: Google Nest Learning Thermostat (3rd generation)

Google Nest Learning Thermostat (3rd Generation)

When it comes to the best overall smart thermostats, Google's Nest Learning Thermostat tops the bunch. Not only does it look good, it works great too. With the built-in advanced learning ability, your daily routine is quickly figured out. By reducing heating or cooling when you are away, Google's thermostat is also helping your budget.

Technical data overview

  • Supports both 2.4 GHz and 5 GHz WiFi connections
  • Bluetooth activated
  • 512 MB internal memory. 10 temperature sensors
  • Additional sensors for ambient light and humidity
  • Motion detection sensor
  • Energy saving display

properties

  • Learn your habits to plan the temperatures you commonly use in your home
  • Saves energy by minimizing heating or cooling when you are away from home
  • The home temperature can be controlled remotely from a mobile device or computer
  • The display will turn on when you enter the room

advantages

  • Learning skills
  • Integration with Google Nest and many other compatible devices
  • Stylistic look
  • easy installation

disadvantage

  • Remote room sensors are available separately
  • Almost as expensive as Ecobee Smart Thermostat

reviews

  • SMARTHOME News Rating: 4.5 / 5
  • Amazon rating: 4.4 / 5
  • Average rating from other websites: 4.3 / 5

Buy if you can

  • You want your smart thermostat to learn your heating and cooling preferences
  • Worth a good user interface

Don't buy if you can

  • The cost of an Ecobee Smart thermostat doesn't matter
  • Plan to use more than one remote room sensor

costs

Best budget smart thermostat

WINNER: Honeywell Lyric T5 Smart Thermostat

Honeywell Lyric T5 Smart Thermostat

With a base price of approximately $ 150, the Honeywell Lyric T5 is one of the most powerful and affordable smart thermostats. With geofencing, good integration options with other home systems and flexible 7-day planning, you get the best bang for your buck.

Technical data overview

  • 2×2 inch display
  • Works with C-wire
  • Connection only via a 2.4 GHz WiFi network
  • Can work as a basic thermostat without Wi-Fi

properties

  • Works with Amazon Alexa, but requires an Alexa device
  • Supports Apple HomeKit and works with Siri
  • Controls your home temperature based on your location using geofencing
  • Allows flexible planning for a period of 7 days
  • Automatic switching from heating to cooling mode based on the house temperature
  • Easy control via a mobile app (available for iOS and Android devices)

advantages

  • Much cheaper than the competition
  • Packed with features
  • Geofencing works like a charm
  • Works great with Alexa and Apple HomeKit
  • You can install it yourself

disadvantage

  • Interface is a bit out of date
  • Lack of support for Google Home, IFTTT and Samsung SmartThings
  • There is no motion sensor to illuminate the display when you enter the room
  • No weather information or humidity control

reviews

  • SMARTHOME News Rating: 4.1 / 5
  • Amazon rating: 4.1 / 5
  • Average websites on Google Rating: 3.8 / 5

Buy if you can

  • Do you already have Amazon Alexa or Apple HomeKit in your house?
  • You want your home to reach the temperature you want before you arrive
  • I don't mind the design.

Don't buy if you can

  • You want to update your existing Google Home or IFTTT system
  • Note that you will have to manually tap your thermostat to see the temperature

costs

Second place: Google Nest Thermostat E.

Google Nest Thermostat E.

While it is in the budget category, Google's Nest Thermostat E isn't exactly cheap. However, if you consider all the features, the price becomes quite reasonable. It is able to learn your habits of saving energy through geofencing and integrates seamlessly with almost any smart home system.

Technical data overview

  • Intelligent self-learning thermostat
  • No C-cable is required for installation
  • Includes a moisture sensor
  • Dual-band WiFi connection for 2.4 GHz and 5 GHz networks
  • Also works with Low Energy Bluetooth

properties

  • Learns your daily habits and automatically adjusts the temperature at home
  • The eco temperature function reduces heating and cooling when you are not at home
  • Geofencing controls when the eco temperature function is activated or deactivated
  • Remote control via a mobile and computer app
  • With the energy history you can learn how much energy you have saved and how you can save even more in the future
  • Works with Google Assistant, Amazon Alexa, and other smart home systems

advantages

  • Budget-friendly because it is made of plastic
  • Self-learning thermostat that adapts to your routine
  • Reliable with many functions
  • Works with additional remote room sensors

disadvantage

  • Could provide more information on the display
  • Doesn't work with Apple HomeKit
  • Doesn't support some more advanced HVAC systems

reviews

  • SMARTHOME News Rating: 4.2 / 5
  • Amazon rating: 4.5 / 5
  • Average rating from other websites: 3.9 / 5

Buy if you can

  • You want to save some money, but not forego the features
  • want the benefit of a self-learning thermostat
  • want to increase the energy savings in your home

Don't buy if you can

  • Use Apple's HomeKit
  • … Find out that your HVAC system is not supported

costs

Best looking smart thermostat

WINNER: GLAS Smart Thermostat

GLAS Smart Thermostat

The GLAS Smart Thermostat is by far the best looking device of its kind. With a large transparent display and a great user interface, this device could become a talking point among your guests. When you conduct indoor air quality monitoring and report on outdoor air pollution, you get a handy smart thermostat.

Technical data overview

  • Beautiful 6-inch transparent OLED with a 16: 9 ratio
  • Built-in speaker and microphone for Microsoft's Cortana assistant
  • Only works on 2.4 GHz WiFi networks
  • Integrated Bluetooth 4.1
  • Integrated indoor air quality sensor

properties

  • Seven-day planning
  • Three event modes: home, away and sleep
  • The pre-start function heats or cools your home based on the upcoming event mode
  • Measures the level of carbon dioxide (CO2) and volatile organic compounds (VOC) in the air
  • Real-time outdoor air quality reporting for allergens, UV index, and air pollution index (API)

advantages

  • By far the best looking smart thermostat
  • Wipe-free, transparent glass display
  • Works with Amazon Alexa and Google Assistant
  • Indoor air quality sensors and outdoor air quality reports

disadvantage

  • One of the more expensive smart thermostats
  • It lacks certain features that the competition offers, especially at this price point
  • Microsoft Cortana still can't compete with Alexa or Google Assistant
  • Does not (yet) work with remote room sensors

reviews

  • SMARTHOME News Rating: 4.0 / 5
  • Amazon rating: 4.0 / 5
  • Average rating from other websites: 3.6 / 5

Buy if you can

  • You want a cool looking thermostat for your living room
  • Pay attention to the air quality in your home and outside

Don't buy if you can

  • I don't want to take out the extra dollars for his good looks

costs

Second place: Ecobee 4

Ecobee 4

With its minimalist design and great user interface, this is one of the most stylish smart thermostats you can find. While it doesn't seem too important what these devices look like, keep in mind that they will likely end up on your living room wall.

Technical data overview

  • 3.5 inch full color LCD with touch screen
  • Quad-core processor, 512 MB DDR4 RAM
  • Contains sensors for temperature, humidity, occupancy and proximity
  • Integrated speakers and microphones
  • Wi-Fi for 2.4 GHz and 5 GHz networks
  • Includes Bluetooth 5.0

properties

  • Built-in Amazon Alexa voice service
  • Works with Amazon Alexa, Apple HomeKit, IFTTT, Samsung SmartThings, etc.
  • The "Follow Me" function uses presence sensors to adjust the temperature in the rooms you use
  • With the Eco + function, you can optimize power consumption and save money in the process

advantages

  • Well thought-out design
  • Includes integrated voice control from Amazon Alexa
  • Comes with a remote room sensor
  • Supports geofencing to determine when you are leaving and returning home
  • Easy DIY installation
  • Compatible with many other smart devices you may have in your home

disadvantage

  • In the upper price range compared to the competition
  • Integrated loudspeaker is not among the best

reviews

  • SMARTHOME News Rating: 4.5 / 5
  • Amazon rating: 4.4 / 5
  • Average websites on Google Rating: 4.5 / 5

Buy if you can

  • must also control the temperature in other rooms
  • … want to use Alexa but not buy Amazon hardware
  • want to have a stylish thermostat in your living room

Don't buy if you …

  • … only need an intelligent thermostat. There are cheaper options than this

costs

Best smart thermostat for energy efficiency

WINNER: Ecobee3 Lite

Ecobee3 Lite

Thanks to its proximity sensors, Ecobee3 Lite optimizes your indoor temperature when you are not at home. Although it has modest study skills, it ensures that no energy is wasted while keeping your home at a comfortable temperature each time you enter.

Technical data overview

  • 3.5 inch LCD
  • Comes with integrated temperature and humidity sensors
  • You can add additional stand-alone proximity sensors for room temperature control
  • Uses a C cable to power the functions. However, if you don't have a cable, you can use an external power supply

properties

  • The "Follow Me" function automatically switches off heating or cooling in empty rooms
  • The "Smart Home & Away" function improves energy efficiency when you are not at home
  • Works with almost any home system
  • Easy to use mobile app

advantages

  • Reasonable price compared to the competition
  • Works with remote room sensors
  • Supports Microsoft Cortana, Amazon Alexa, Apple HomeKit, Samsung SmartThings, IFTTT and Wink Smart Home systems
  • Super chic design

disadvantage

  • Does not support geofencing
  • No real study skills for your daily routines

reviews

  • SMARTHOME News Rating: 4.0 / 5
  • Amazon rating: 4.5 / 5
  • Average websites on Google Rating: 3.8 / 5

Buy if you can

  • want great energy efficiency at a reasonable price
  • need to control each room in your home separately

Don't buy if you can

  • Don't plan on buying separate room sensors
  • really need geofencing
  • … would like your intelligent thermostat to learn all of your daily routines by itself

costs

Second place: Mysa Smart Thermostat

    Mysa Smart Thermostat

While the Mysa Smart Thermostat is only intended to control your electric baseboard heater, it works pretty well. Thanks to the energy optimization that you get with this thermostat, you can cut your monthly electricity bill by over 25%.

Technical data overview

  • Works with high voltage electrical heaters
  • Supports heating with up to 3800 watts
  • Incompatible with low voltage systems
  • Onboard temperature and humidity sensors
  • Only works with 2.4 GHz Wi-Fi networks

properties

  • Supports geofencing via a mobile app
  • Seamless integration with most smart home systems
  • Includes a vacation mode to save even more electricity
  • Tracks your energy consumption to further optimize electricity costs

advantages

  • Uses geofencing to improve energy efficiency
  • Multi-zone support to customize your heating at home
  • Compatible with Google Assistant, Amazon Alexa and Apple's HomeKit
  • Cool industrial look of the main unit

disadvantage

  • The minimalist design of the display limits the information you can get from the smart thermostat
  • Installation and installation instructions can be confusing
  • To have complete control over the temperature of your home, you will need additional Mysa thermostats for underfloor heating and air conditioning

reviews

  • SMARTHOME News Rating: 4.3 / 5
  • Amazon rating: 4.5 / 5
  • Average rating from other websites: 4.2 / 5

Buy if you can

  • You want to add energy efficiency to your high voltage electrical heating system
  • want a variety of functions

Don't buy if you can

  • need a smart thermostat that controls the heating and cooling of your entire home
  • Don't plan on adding more Mysa thermostats to your setup

costs

Best smart thermostat for multiple zones

WINNER: Honeywell Home T9 Smart Thermostat

Honeywell Home T9 Smart Thermostat

When it comes to multi-zone temperature control, Honeywell's Home T9 Smart Thermostat does the job better than anything. With a sensor included in the scope of delivery and other sensors available for purchase, you receive room-by-room adaptation at the highest level.

Technical data overview

  • Connects to the Internet using 2.4 GHz and 5 GHz Wi-Fi networks
  • Integrated sensors for temperature, humidity and proximity
  • Can work without a C-cable by connecting to an external charger

properties

  • Remote room sensors detect whether the room is not occupied and adjust the temperature accordingly
  • With geofencing, you can heat or cool your home before you get home from work
  • The integrated dehumidifier ensures that you feel comfortable and at the same time save electricity

advantages

  • Supports multiple remote room sensors that are very precise
  • You can create custom zones around your home to keep them at different temperature levels
  • Minimizes energy consumption when you are not at home with the help of geofencing technology
  • Study skills always keep your home at the right temperature when you need it
  • Excellent user-friendly interface design
  • Works with Amazon Alexa, Google Assistant, Cortana from Microsoft and IFTTT

disadvantage

  • Lack of direct integration with other Honeywell smart home devices
  • Doesn't support Apple HomeKit

reviews

  • SMARTHOME News Rating: 4.2 / 5
  • Amazon rating: 4.3 / 5
  • Average rating on Google websites: 4.0 / 5

Buy if you can

  • need an inexpensive multi-zone smart thermostat
  • I want to install top quality remote room sensors
  • … Have a random daily schedule that only geofencing can address

Don't buy if you can

  • prefer a smart thermostat with all the bells and whistles that more expensive products offer
  • Run your home WiFi at 5 GHz

costs

Second place: Tado Smart Thermostat

Tado Smart thermostat

With the Tado Smart Thermostat, zoning your home is easier than ever. Although you will have to buy additional smart radiator valves, it gives you one of the most precise ways to adjust the temperature of any room. When you add geofencing and multilingual support, it's clear why this thermostat almost won.

Technical data overview

  • Sensors for measuring temperature and humidity
  • Change the power supply with AAA batteries if you don't have a C-cable
  • Free app for iOS and Android mobile devices as well as for desktop and laptop computers
  • Contains a separate "Internet Bridge" device that you can use to connect to your home wireless network

properties

  • Controls each room in your house separately via interconnected radiator valves that communicate with the main unit over the internet
  • Uses geofencing to track the location of your cell phone and determine when you are away from home so that the temperature can be optimized accordingly
  • The user interface supports multiple languages: English, German, French, Italian, Spanish and Dutch
  • Support for popular smart home systems

advantages

  • Multi-zone support that works per room
  • Geofencing for optimized heating and cooling when you are not at home
  • Easy integration into Amazon Alexa, Apple HomeKit and IFTTT

disadvantage

  • No presence sensors
  • You must purchase additional radiator valves to use the multi-zone functions
  • Not being able to self-learn to automatically adjust to your daily routine
  • User interface could be better
  • Requires its "Internet Bridge" to connect to Wi-Fi

reviews

  • SMARTHOME News Rating: 4.5 / 5
  • Amazon rating: 4.4 / 5
  • Average rating from other websites: 4.4 / 5

Buy if you can

  • want to heat or cool each room individually
  • Plan to set up multiple heating and cooling zones around your home

Don't buy if you can

  • You don't want to have to buy smart radiator valves
  • You don't want an additional device to be able to use your smart thermostat with WiFi

costs

FAQ:

Are you saving money with smart thermostats?

Yes, smart thermostats can definitely save you money. And if you live in areas with extremely hot and cold weather, the savings are more significant. This is how they work.

The basic function of a thermostat is to keep the temperature in your house at the level you set. With manual thermostats, you not only have to set them, but also toggle them on and off. This means that in cold winters you can expect to return to an uncomfortably cold house if you have turned the thermostat down to save on heating bills. The only way to prevent this from happening is to set the thermostat to a comfortable temperature while you are away.

Needless to say, this means a lot of waste of energy as you heat your home when no one is around. It would be magical if you could tell your heater to turn on an hour or two before your return. That's exactly what smart thermostats do.

When looking at top of the line smart thermostats, there are many ways to do it. First of all, you can create your own 7-day schedule for heating and cooling, taking into account both working days and weekends. At the next level, some smart thermostats can learn your daily habits on their own. That way, you don't even have to do anything with your thermostat. It will know when to provide the optimal temperature for your entire home base in your routine.

Finally, there is the geofencing function. With the help of a mobile app, you can set a detection scope around your house. Every time you go to work, the thermostat receives the information that your mobile phone has left the area. Based on this information, the thermostat will automatically reduce heating or cooling as nobody is home.

If, on the other hand, your mobile phone enters this area, it signals the Smart Thermostat to adjust the temperature. The circumference can be adjusted from a few feet around your house to ten or even a hundred miles away.

Thanks to all of these smart features, modern thermostats save money by not wasting energy. Some go so far as to know when electricity tariffs are low and take this opportunity to preheat or precool your home. Keeping your home at an optimal temperature at all times can reduce your heating and cooling costs.

Are intelligent thermostats easy to install yourself?

Most thermostats are pretty easy to install. Depending on the model and where you plan to install it, it will take anywhere from 15 minutes to an hour and a half to set up in most cases. The best way to install a new thermostat is to turn off the device, remove the cover from the old thermostat, and take a picture of its wiring.

After that, completely remove the old thermostat from the wall and install the new one. Of course, when doing this, follow the wiring pattern of the old one to connect the smart thermostat.

If you don't feel comfortable doing the wiring on your own, it is best to consult a professional to set it up for you. That way, you can be sure that everything is working properly.

Are Smart Thermostats More Accurate?

Smart thermostats are digital. They are based on a temperature sensor and software algorithms for recording the room temperature. On the other hand, analog thermostats usually use metal parts to sense the current ambient temperature. If you compare the two, this is where digital thermostats win because they can detect temperature changes much faster.

When it comes to accuracy, all thermostats have some variation between the room temperature and the moment the system turns on. For example, if you set the temperature to 75 degrees, the system will actually start at 72 or 78 degrees (depending on whether it is heating or cooling).

When comparing digital and analog thermostats, analog thermostats suffer from much more variation than digital ones. This makes intelligent thermostats more accurate and convenient than their analog counterparts.

Can smart thermostats be used with any boiler?

Unfortunately, not all thermostats are compatible with every existing boiler type. If you have a boiler in your house, you almost certainly already have an analog or digital thermostat. Whenever you buy your new smart thermostat, consider wiring it in place of your old one. And in most cases it is true.

But sometimes that just isn't possible with your existing setup. There can be several reasons for this. First, your boiler may be too old to provide a safe source of hot water for your system. If so, you should replace it, ideally with a more modern version. Once you do this it is almost certain that your thermostat is compatible with it.

Another case could be that the wiring of your boiler is not compatible with a smart thermostat. This is mainly due to the lack of wiring points in your old system so it cannot support a smart thermostat. Regardless of which of the two situations you run into, you will most likely need to upgrade your boiler before you can use a smart thermostat in your home.

Which smart thermostats use a C-wire?

Every smart thermostat you've read about in this article works with a C-wire. If you're not sure what a C-wire is, here's a quick explanation.

C-wire stands for "Common Wire". A C-cable means that it is not the actual source of power for the basic functions of your thermostat. What drives this part are the R-wires commonly known as the "hot wires".

The C-Cable provides the continuous flow of 24 VAC (volts AC) for the additional functions of your thermostat that need to be powered around the clock. This includes the display, Wi-Fi connection, sensors, microphone, speaker and other hardware functions.

With R-wires, one or two such wires can lead to your thermostat. If there are two, they have different names. Rh is power for heating, while Rc is power for cooling. If there is only one R-wire, it can have the additional label Rh / c, no label at all, or just R.

Do all intelligent thermostats recognize the room occupancy?

Not every thermostat can recognize the room occupancy. It all depends on whether it has a built-in room occupancy sensor. In most cases, smart thermostats work with remote room sensors. You can place these sensors around your house to monitor if a room is occupied.

As soon as a sensor detects an empty room, it immediately forwards this information to the main thermostat unit. Based on this, the thermostat will reduce the heating or cooling for that room until someone re-enters it.

Auf diese Weise kann ein intelligenter Thermostat dazu beitragen, Ihre monatliche Stromrechnung erheblich zu senken, insbesondere bei extremer Sommerhitze oder beißender Winterkälte.





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