To save money on heating this winter and make your home heating more sustainable, your best best is a smart heating system. You'll be able to check the temperature at a glance, set schedules easily and features such as home-away and open window detection mean you won't waste heat.
What's more, you can always come home to a cosy house or wake up in a warm bedroom.
Still, not every smart heating system is the same - and in fact there's a huge amount of variation in tech and pricing, which can make it pretty confusing.
We've tested most of the smart systems in the UK market and we've done our best to break down how each works, what features they have, how they're installed and what might make them worth your money.
Read on after our chart for more in-depth buying advice.
Best smart heating system reviews
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1. Hive Active Heating 2 - Best design
The Hive Active Heating system is a great upgrade for anyone who wants or needs to be able to control their heating remotely. The addition of multi-zone support is also good, and the ability to boost heating and hot water is a brilliant feature.
This second iteration of Hive is a giant leap forward from the solid (but somewhat dull) first-generation product. The interfaces of both the app and thermostat are intuitive and quick to use. There are clearly energy savings which Hive can help you make and you can quickly recoup your expenditure if you're conservative with your temperatures and schedule. And it's easy to add the Hive Active Light, as well as smart plugs and switches.
Read our full Hive Active Heating 2 review
2. Honeywell Evohome - Most comprehensive system
Despite the cost, EvoHome is a fantastic system for those who want to control temperatures in different rooms, have control over their hot water and also those with underfloor heating. It's particularly good for larger homes with few occupants where you might want to heat only certain rooms at certain times.
It's very easy to use, even for technophobes and although it can take a while to set a schedule in the first place, making tweaks is quick and simple.
If money is no object, we can highly recommend Evohome. For virtually everyone else, a Hive or Nest with dumb TRVs is a more affordable option.
Read our full Honeywell Evohome review
3. Nest Learning Thermostat (3rd Generation) - Simplest to use
Being reliable, well-designed and easy to use, the Nest thermostat is a great choice. It doesn't have the array of accessories and compatibility of systems that some systems do, but you can buy separate smart TRVs to control radiators without changing your plumbing.
The Nest Protect smoke and carbon monoxide alarm also works with the thermostat, as does the Nest Cam camera. The 3rd generation can also control your hot water, making it even better, and the latest app update means your phone can tell it when you've gone out, so you don't waste money heating an empty home.
Read our full Nest Learning Thermostat (3rd Generation) review
4. Genius - Full smart home capability
Genius is easy to use and efficient, and over time it may even save you the cost of installation. And it's fairly priced, although far from cheap. How long Genius takes to pay for itself will depend on your circumstances, and it may be that dropping £800 to £1,200 or more is too much of a long-term investment.
But it is a great product, and if you are looking to install a zoned smart heating system, we are happy to recommend Genius - not least because of its potential as a true smart home network for your house.
Read our full Genius review
5. Tado Smart Thermostat Starter Kit V3+ - Best for use with location services
Determining a house’s temperature depending on who's at home makes a lot of sense. In this arena, Tado is the best smart thermostat as its presence detection simply follows you and your smartphone via GPS and other location factors. However, those features are now locked behind a paid subscription.
Being able to control the temperature (wherever you are) via an app on your phone is an ideal way to control your heating and energy costs. New inside and outside Air Comfort reports and Open Window Detection features, plus the ability to control multiple zones via smart radiator valves, improve on the central idea.
Tado isn’t cheap, but you should start saving on your heating bills within a few days, even with the subscription fee.
Read our full Tado Smart Thermostat Starter Kit V3+ review
6. Drayton Wiser Multizone - Best priced multi-zone system
Wiser is easy to install and easy to use. You could get it set up in half an hour and it won't require you to call out an engineer. It doesn’t have lots of advanced features but it is much cheaper than some of its rivals.
What it does do well is allow you to control the temperature separately in different rooms, via smart radiator valves, which are also easy to fit.
The app is great, too, and several features have been added since launch, showing that it's still being developed.
Read our full Drayton Wiser Multi-Zone review
7. Nest Thermostat E - Most stylish
The Nest E is a great smart thermostat that’s comfortably among the most stylish and easy to use on the market, but as it stands in the UK, there’s not much reason to opt for the E over the existing 3rd Generation Nest, which has some extra functionality for a similar price - excluding the potential cost of a professional installation.
It's a different story in the US though - a bigger price gap makes the E an easy recommendation if you're in the States, it offers all of the most important features of the third-generation Nest, together with design improvements, for a significantly lower price.
Read our full Nest Thermostat E review
8. Netatmo Smart Thermostat - E-ink display
Netatmo's thermostat is relatively basic, lacking any kind of presence detection, but it works well and is one of the cheaper options. The display lets you adjust temperature and nothing else, so you'll need a compatible phone or tablet to get the most from the system.
Read our full Netatmo Smart Thermostat review
9. Devolo Home Control Radiator Thermostat - Best budget option
Even though it was designed with the whole home in mind, the heating accessories make Devolo a great smart heating system. Unlike Nest and Hive, you don’t need an engineer to install it – in fact, it only took us minutes to do it ourselves. However, to control the boiler you'll need the smart thermostat as well.
The app experience lets it down a bit, but the full website more than makes up for those frustrations. Devolo’s additional accessories can turn a dumb home smart, and it can be a gradual process as all accessories are sold separately.
Read our full Devolo Home Control Radiator Thermostat review
10. Momit Home Thermostat - Easy replacement for a wired thermostat
If you're replacing a wired thermostat and don't mind fixing the Momit in the same place, then installation is an absolute breeze, and a snip for the price. It's certainly not the most stylish and isn't really suitable if you need to control hot water too, but for many people it will give them the remote control they need, with good presence detection and geo-location as bonuses.
If you need a wireless smart thermostat you'll need to buy the optional extension box, which brings the price closer to its nearest competitors.
Read our full Momit Home Thermostat review
Guide to buying smart home heating
The best smart heating system for you depends on the type of home you have, how you use it and how much money you can outlay to make longer-term savings.
There's a way of making every house more efficient, comfortable and wasting less heat. But the best method for each house will differ.
The key question is the level to which you need - or want - to make your heating smart.
Most of these systems - Hive, Nest and Netatmo - simply put a smart thermostat into the most-used room in the house or the hallway, and moderate the temperature of the whole house to match that room. For smaller houses, in which most rooms are in regular use, this is probably a cost-effective way of attaining the results you want. You can always turn off the radiators you don't need to avoid heating rooms unnecessarily.
They also make it easier to set schedules and many have additional 'smart' features to make your heating more efficient and save you money. For example, some can detect when no one's home and automatically turn off the heating, or do the same if a window is left ajar.
Honeywell Evohome, Tado, and Genius offer something better. One of the ways they do this is by replacing the valves on your radiators with 'smart' valves, although depending on which package you get, you may have to buy these separately.
They allow you to divide up your home into various zones and then offer smart heating in each zone, so your guest bedroom is heated only when required, the master bedroom is warm in the morning and at bedtime, and the kitchen is hot at tea time.
In the UK at least, all modern houses with living space covering ground greater than 150m2 have to be built with at least two zones of heating, according to 2013 Building Regulations Part L.
Tado can be smart-radiator based or a combination of room thermostat and zonal control via its Smart Radiator Thermostats. These smart TRVs can often be used independently of the thermostat so you don't necessarily need to buy the same brand and you can still use them with Nest, which doesn't currently offer the valves. The only issue is that you'll need two separate apps to control your heating.
Smart TRVs are also a great option for people in rented accommodation, as they don't require permanent installation. Devolo's system allows you to build up smart devices as and when you need them.
Honeywell, Genius and certain others can control more sophisticated heating systems (including underfloor heating and hot water tanks) but with this additional control comes a higher price tag.
So again: a well-used, modern, small house (or flat) is unlikely to need this level of sophistication, and a well-used large home may have sufficient zones plumbed in to make Nest or Hive a good solution. Just remember that you'll need one thermostat per zone, so while it's cheaper than fitting each radiator with a £50/$50 smart TRV, it's still relatively expensive.
If you have a boiler and central heating you will likely be able to fit any of the systems here. Storage heaters are another matter, as we discuss in this article: can I use a smart thermostat if I have a storage heater?
The next questions to ask are about which additional features are important. There's no point opting for a system that centres on location services, such as Tado, if there's usually someone at home.
Remember that you might also want to supplement your central heating system with a separate portable system, which can give you some more manual control over where you heat. We've also reviewed portable heaters, so take a look for our recommendations.