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How To Buy The Best Smart Thermostat

Best smart thermostat

Looking to buy the best smart thermostat? Check out our guide below and you’ll be well-placed to select the right one for you.

Home heating is a need — at least in the United Kingdom – but it may be inconvenient to maintain.
Systems heat up and cool down at unpredictable rates, and your home can quickly go from being too chilly to being too hot, and back again.
It’s also all too simple to squander money by heating areas you don’t use or keeping the living room warm after you’ve gone out for the day.

Invest in a smart thermostat to put an end to these issues.
Smart scheduling is used by today’s connected heating systems to ensure that your home is at the perfect temperature when you want it – and many of them can even control various rooms separately to ensure that heat is directed where it’s required.

They can also save you money by detecting when you’re gone and automatically turning off the heat, so a smart thermostat might quickly pay for itself in a few years.
The only question is, with so many options, which one should you choose?
Here are our top five picks, as well as a buyer’s guide to assist you in making the best decision.

How do you pick the best smart thermostat for your home?

Work out if you need a simple whole-home thermostat or a more complicated multi-room system before looking at the many smart heating systems on available.
The former turns on or off all of your radiators at the same time, making it very easy to control.
You can manually change the thermostatic radiator valves (TRVs) to alter how much hot water goes into each radiator if some portions of your home get hotter than others.

You may select a precise temperature target for each room and even create multiple heating schedules for different regions of your house with a multi-room system.
There’s still more to configure, and each radiator you want to regulate will require a smart TRV, which can potentially quadruple the cost of the system.

Is it necessary to hire a professional to install the smart thermostat?

If your home doesn’t already have a thermostat, you’ll almost certainly need to hire a technician to install your new smart device.
If you’re replacing an existing thermostat, though, you might be able to install it yourself.
If you choose a model like the Tado that is built for self-installation, you can save a lot of money.
But be realistic: you’ll need to know how to work with electrical wiring, and if you want to install smart TRVs, you’ll also need to know how to work with plumbing.

What method does it use to connect to the network?

A Wi-Fi module is included in certain smart thermostats, allowing them to connect directly to your home network.
Others include a separate bridge that uses an Ethernet connection to connect to your router.
If your router doesn’t have a spare socket, this could be an issue; verify before you buy, or you might end up having to install a complex network switch simply to power your thermostat.

Is it possible for the thermostat to detect when you’re not at home?

Because it is inefficient to keep your home heated while you are away, most smart thermostats attempt to work out when the house is vacant.
Many use geofencing, which involves using a companion app on your smartphone to report your whereabouts.
If you live with others, you’ll need a multi-user system that can track everyone, or they’ll be left out in the cold when you leave for the day.
Some systems (such as the Nest) have a motion sensor that can detect when someone is moving around inside and keep the heating on even if the primary user isn’t present.

Is the smart thermostat compatible with IFTTT and voice commands?

The majority of smart thermostat solutions integrate with a voice-control technology.
This means you may, for example, temporarily increase the temperature in a certain room without having to look for your phone or physically interact with the thermostat.
However, be sure that your preferred voice system is supported:
The majority of devices are compatible with Amazon Alexa, however not all are compatible with Google Home or Siri.

Integration with the IFTTT automation service is the last thing to search for.
While not a must-have function, this allows you to operate your heating from a distance or configure particular triggers to activate different heating settings.

Best smart thermostat to buy

SaleBestseller No. 1
Google Nest Learning Thermostat 3rd Generation, Stainless Steel - Smart Thermostat - A Brighter Way To Save Energy
  • Saving energy starts with your thermostat. Your thermostat controls 60% of your energy bill. So shouldn’t it help you save energy? The Nest Learning Thermostat does. Since 2011, it’s saved over 4 billion kWh of energy in millions of homes worldwide*. Because it learns from you. It gets to know the temperature that you like while you’re at home. And turns itself down when you’re away. It even learns how your home warms up or how draughty it is, so it only uses the energy that it needs
  • Auto-Schedule. Just turn it up and down. It learns the temperatures that you like and creates a schedule for you
  • Home/Away Assist. It automatically adjusts the temperature after you’ve left. It can even turn off your hot water if you’re away for a few days
  • Hot water. Now you can control your hot water tank. And give your hot water a boost when you need it
  • OpenTherm technology. Nest now uses OpenTherm technology to modulate your high-efficiency condensing boiler
SaleBestseller No. 2
tado° wireless smart thermostat - Wifi Starter Kit V3+ incl. Stand - Wireless boiler control & hot water control via App - save energy - works with Alexa, Siri & Google Assistant
  • Full control over your heating with the tado° app from anywhere, reduce your energy consumption and save money with the the intelligent features tado° offers
  • Heating Boost: heat up all rooms for 30 minutes with one click in the app
  • Smart Schedules for the perfect temperature individually in each room, at any time; only active when someone’s home; can optionally be turned on and off with one click in the app
  • If no one is home or an open window has been detected, the tado° app reminds you to turn down the heating via push notification
  • Further advantages with Auto Assist (optional): If no one is home or open windows have been detected, tado° automatically turns down the heating; Care & Protect helps to solve heating problems (in-app purchase, cancel monthly; £2.99/month)
Bestseller No. 3
tado° wired smart thermostat - Wifi Starter Kit V3+ - digital thermostat for boiler control via App - easy installation - save heating costs - works with Alexa, Siri & Google Assistant
  • Full control over your heating with the tado° app from anywhere, reduce your energy consumption and save money with the intelligent features tado° offers
  • Heating Boost: heat up all rooms for 30 minutes with one click in the app
  • Smart Schedules for the perfect temperature individually in each room, at any time; only active when someone’s home; can optionally be turned on and off with one click in the app
  • If no one is home or an open window has been detected, the tado° app reminds you to turn down the heating via push notification
  • Further advantages with Auto Assist (optional): If no one is home or open windows have been detected, tado° automatically turns down the heating; Care & Protect helps to solve heating problems (in-app purchase, cancel monthly; £2.99/month)
Bestseller No. 4
Drayton Wiser Smart Thermostat Heating and Hot Water Control Kit - Works with Amazon Alexa, Google Home, IFTTT
  • Suitable for conventional boilers (2 channel - boiler with separate hot water tank). Very easy to install due to the kit fitting onto a standard UK back plate used on most traditional installations.
  • This kit allows you to take full control of your heating and hot water system via your phone.
  • You can add Wiser Smart Radiator Thermostats to your system to provide room-by-room control at any time in the future. Supports up to 16 rooms with up to 63 Wiser Radiator Thermostats and up to 10 smart plugs.
  • Kit includes HubR and smart Room Thermostat for smart home heating and hot water control.
  • Wiser is compatible with voice assistants including Amazon Alexa and Google Assistant.
SaleBestseller No. 5
tado° Wired Smart Thermostat Starter Kit V3+ – Intelligent Heating Control, Easy DIY Installation, Designed in Germany, Works with Alexa, Siri & Google Assistant
  • Full control over your heating with the tado° app from anywhere, reduce your energy consumption and save money with the intelligent features tado° offers
  • Heating Boost: heat up all rooms for 30 minutes with one click in the app
  • Smart Schedules for the perfect temperature individually in each room, at any time; only active when someone’s home; can optionally be turned on and off with one click in the app
  • If no one is home or an open window has been detected, the tado° app reminds you to turn down the heating via push notification
  • Further advantages with Auto Assist (optional): If no one is home or open windows have been detected, tado° automatically turns down the heating; Care & Protect helps to solve heating problems (in-app purchase, cancel monthly; £2.99/month)
Bestseller No. 6
Honeywell T6R Wireless Smart Thermostat - works with Amazon Alexa - Black
  • Simple touch-screen interface. The T6R touch-screen makes scheduling, changing and overriding temperatures easy with a large, clear display and intuitive on-screen text guidance.
  • The Honeywell Home app gives you complete control over your home heating wherever you are, including schedules and automated synchronisation with the thermostat.
  • Using the location features on your smartphone, the T6R communicates with the Honeywell Home app to determine when your home is vacant or when you are on your way home adjusting the temperature automatically.
  • Scheduling to suit you. The T6R features a choice of schedule settings to fit your lifestyle, including 7 day, 5/2 day and single day scheduling with up to 6 different time settings per day.
  • Apple Home kit ready. The T6R is Home kit enabled meaning it can be controlled using an Apple device (requires iOS 8.1 or later), as part of a suite of home kit compatible products.
Bestseller No. 7
tado° smart radiator thermostat - Wifi Starter Kit V3+ - incl. 2x smart radiator thermostat - digital heating control via App - easy installation - works with Alexa, Siri & Google Assistant
  • Full control over your heating with the tado° app from anywhere, reduce your energy consumption and save money with the intelligent features tado° offers
  • Heating Boost: heat up all rooms for 30 minutes with one click in the app
  • Smart Schedules for the perfect temperature individually in each room, at any time; only active when someone’s home; can optionally be turned on and off with one click in the app
  • If no one is home or an open window has been detected, the tado° app reminds you to turn down the heating via push notification
  • Further advantages with Auto Assist (optional): If no one is home or open windows have been detected, tado° automatically turns down the heating; Care & Protect helps to solve heating problems (in-app purchase, cancel monthly; £2.99/month)
SaleBestseller No. 8
tado° wired smart thermostat - Wifi Add-On thermostat for multi-room control - digital heating control - easy Installation - save heating costs
  • tado° Starter Kit Add-on: add additional Wired Smart Thermostats to your setup to control multiple rooms individually
  • Control all rooms within one app; maximise your comfort and energy savings
  • Only works with a tado° Starter Kit (V2, V3, V3+), available separately
  • Compatible with 95% of all heating systems including hydronic underfloor heating; you need the Wired Smart Thermostat if you have a conventional wired room thermostat to control the boiler
  • Box contains: 1x Smart Thermostat, 3x AAA batteries, sticky pads, mounting material
SaleBestseller No. 9
Netatmo Smart Thermostat for Individual Boiler, NTH01-EN-EC
  • EASY ENERGY SAVINGS: the heating schedule saves you money and heats your home to just the right temperature. Going on holiday? Set the Absent and Frost Protection modes.
  • VOICE AND DISTANCE CONTROLLED HEATING: control your Smart Thermostat from a distance via your smartphone, tablet or computer or with voice control thanks to Apple HomeKit, Alexa and Google Assistant compatibility. Temperature (measurements): Range: 0°C to 50°C (± 0.1°C)
  • QUICK AND EASY TO INSTALL: it takes less than an hour to install the Netatmo Smart Thermostat.
  • A SMART THERMOSTAT: the Auto-Adapt feature takes into account the outdoor temperature and your home’s insulation to make sure your home stays at the temperature you set.
  • COMPATIBILITY: the Netatmo Smart Thermostat is compatible with most types of boiler, whichever energy you use: electricity, gas, fuel oil, wood or heat pump.
Bestseller No. 10
MoesGo WiFi Smart Thermostat and Programmable 2.4GHz WiFi Temperature Controller Metal Brushed Panel for Electric Heating, Netural Wire Required, Voice Control, Compatible with Alexa and Google Home
  • 1.This device fits most of the electric heating system with 95-240V, 50/60Hz, 16A max. current; control your heating wherever you are and enjoy extra convenience and energy-saving; also compatible with Amazon Alexa and Google Home for hands-free control
  • 2.Brushed silver metal frame with colour digital display; simple, effective, easy-to-use design that suits any style of decoration
  • 3.Offers full-auto or manual set up; control your device manually or connect to WiFi and adjust heating schedules and temperature via smartphone app, easily adjusting or controlling the temperature of your house; remembers settings when powered off
  • 4.Features 5+1+1 six period programmable control allowing you to adjust your home's heating to suit your schedule; stay comfortable when you're at home and save energy when you're out
  • 5.Highly accurate within 0.5°C; adjustable range between 5-35°C; LCD screen with touch button is easy to read, even in the dark

Smart Thermostat FAQs

What are smart thermostats? 

Smart thermostats are a new way to save money on your heating bills. They can use an internet connection to turn on or off your heating remotely. So, when you’re close to home, you can use your smartphone or tablet to switch on your heating.

Not only can you control the temperature from afar, but many of these digital heating systems can also display you how much heat you’re consuming, allowing you to track your consumption and learn your habits.

It’s critical to keep in mind that these are not smart meters. Most energy companies will install them for free. Smart thermostats, unlike smart metres, can be installed or arranged by the user. This means that it makes no difference who provides your energy. Furthermore, switching suppliers is unaffected by smart thermostats.

How are smart thermostats different?

They’re smarter thermostats than your old manual type, as the name implies. On the most fundamental level, they’re the same. You can create a schedule to suit your needs, increase the heat if you’re cold, and turn it off whenever you want, just like any other thermostat.

Smart thermostats, on the other hand, differ from regular thermostats in that they have added technology. They can learn how your home heats up, what temperatures you want, and detect open windows or draughts, among other things.

Some smart thermostats can even track when you leave the house and when you return. While you’re on vacation or out and about on a cold day, it’ll adjust the heating for you or make sure your pipes don’t freeze.

How do smart thermostats work?

Smart thermostats are clever devices that connect to both your boiler and your home Wi-Fi network using an existing thermostat wiring connection. As a result, your old boiler can become a smart home component. Naturally, your boiler must be suitable. When choosing a smart thermostat, verify with the manufacturer to see if this is the case.

You can now change your thermostat settings at the touch of a screen from wherever you are thanks to the simple download of an app.

To adjust the temperature while you’re away, you’d do the following with most smart thermostats:

Set the temperature using the smartphone app.
The new setting will be sent to your home.
The new command is sent to your thermostat by your Wi-Fi router.
Your smart thermostat changes the temperature and tells your boiler whether or not to turn on or off.

Will a smart thermostat still work if my internet goes down?

Don’t panic if your internet is down. Your heating will remain on, and your smart thermostat should continue to run according to the schedule you’ve set. Although you won’t be able to manage the thermostat using your smartphone or online, you can still use the manual controls on the thermostat if necessary.

Hot water control 

Some smart thermostats can also regulate your hot water and central heating. If you have a combi boiler that offers quick hot water, you won’t need a smart thermostat for this.

Note that not all smart thermostats with hot water control come with this feature as standard.

Using an app to turn on the hot water, as well as your heating, is far more convenient. If you’ve been away for a few days and forgot to turn it back on, simply use your smartphone to do it before you return home.

You may programme a schedule just like a typical thermostat. This prevents you from getting a cold shower in the morning because you forgot to turn on the hot water, and instead allows you to use your phone, tablet, or computer.

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