Last updated: August 10, 2021

Welcome to our big heating control test 2021. Here we present all the controllers we have tested in detail. We have compiled detailed background information for you and also added a summary of the customer reviews on the web. We would like to make your purchase decision easier and help you find the best heating control for you.

You will also find answers to frequently asked questions in our guide. Furthermore, you will also find some important information on this page that you should definitely pay attention to if you want to buy a heating control.


  • A heating control system serves to ensure optimum heat balance in living spaces. There are increasingly convenient solutions for consumers on the market.
  • With a well-designed heating control system, you can save a lot of money per year. It also saves a lot of energy, which in turn benefits the environment.
  • With an intelligent heating control, you can even control your living space when you are away from home. The newer heating controls can be conveniently managed via a mobile phone app.

The Best Heating Control: Our Choices

Guide: Questions you should ask yourself before buying a heating control system

What is a heating control?

Basically, it means that the use of a heating system is controlled. Without a heating control you would otherwise have to switch the entire heating system on or off manually and in the meantime the heating would run at full speed.

Since we don't always need a completely heated room, intelligent heating controls have been developed. The smallest form of a heating control is, for example, lowering the temperature at night.

The aim of a heating control is always to save energy, which is also good for your wallet.

Nobody needs a 25° living room while sleeping in the bedroom next door. Such a small heating control can be realised with a simple timer.

What are the most important components of a heating control system?

First and foremost, thermostats are used. These thermostats can simply be mounted on the radiators in the living rooms. With intelligent thermostats, you can simply set the desired room temperature in Celsius. A temperature sensor ensures that the set temperature is constantly maintained.

There are also thermostats that are based on the outdoor temperature. In this case, a sensor is installed outside the living room that regularly records the outside temperature. (Image source: / geralt)

The heating is controlled on the basis of these temperatures. For example, if it is very cold outside, the heating runs at maximum power and in the summer months the heating automatically switches off.

What are smart heating controls?

Smart heating controls are heating elements that can be controlled via computers or smartphones. However, this requires that the control elements are at least equipped with Bluetooth or similar components. This makes it possible for the elements to be connected to the home network or to the smartphone.

The advantage is obvious: you can then set the temperature of your living space using your smartphone and do not have to be at home.

Some developments can go so far that the intelligent heating control independently searches for weather data on the internet and adjusts the heating output of your heating system accordingly. The heating control system thus ensures completely independently that the optimum temperature always prevails in your living space.

What types of thermostats are there?

We have compiled the following table to give you a good overview of the different types of thermostats.
Type of thermostat heating control
Mechanical thermostats only on the radiator in the living room
Radio thermostats on a control centre in the living room
Intelligent thermostats via smartphone from anywhere

Decision: What types of heating controls are there and which is the right one for you?

Basically, you can distinguish between 3 different types / types of heating controls:

  • Mechanical thermostats on radiators
  • Radio thermostats on the wall
  • Intelligent thermostats on radiators

What are the mechanical thermostats and what are the advantages and disadvantages?

The mechanical thermostats mainly consist of two parts: a heat sensor and a valve that regulates the hot water in the heaters. The thermostat can be turned and thus set to a certain temperature on a scale. This set temperature is maintained until the scale is changed.

  • Set temperature is maintained according to the scale
  • Room temperature can be easily changed by turning
  • Quick installation and quick replacement
  • Saves approx. 6 % of the heating energy
  • Exact temperature cannot be set
  • A defect is often discovered late
  • Must always be operated mechanically

What are radio wall thermostats and what are their advantages and disadvantages?

Whereas with mechanical thermostats each radiator has to be operated manually, the handling of electric radio thermostats is much easier. The individual thermostats on the radiators are connected to a main thermostat via radio. This main thermostat is located as a so-called control centre anywhere in the house and can be programmed there.

  • Adjustment of all radiators at a central point
  • Exact temperatures can be preset
  • Temporal presets can be programmed (night setback)
  • Can be taken along when moving house
  • Saves approx. 10% of heating energy
  • Radio connection may cause problems in some locations
  • Can only be programmed in the house

This means you no longer have to go into each individual room to regulate the heating power there. You can conveniently set the different temperatures for each room on the wall thermostat.

What are intelligent thermostats and what are the advantages and disadvantages?

Intelligent thermostats are heating controls via the internet or smartphone. The individual thermostats contain mini-computers, so to speak, which must be either Bluetooth-enabled or WLAN-enabled. Furthermore, the manufacturers of these thermostats must provide an app that can be installed on the PC or smartphone.

  • Control the heating power conveniently via smartphone or computer
  • Control the heating power from any internet-enabled location in the world
  • Often intelligent window-open detection
  • Often person detection in the room
  • Complete control even during longer absences (holidays)
  • Complete shutdown of the heating possible
  • Dependent on the manufacturer's app
  • Data protection - heating profile could be read out

With the help of this app, you can now control your individual radiators or even the entire heating system via PC or smartphone.

Purchase criteria: You can compare and evaluate heating controls based on these factors

In the following, we would like to show you which factors you can use to compare and evaluate heating controls. In summary, these are:

  • Temperature control
  • Regulation of the time
  • Heating control inside or outside the house
  • Window detection
  • Connection to a weather app

Temperature control

If you buy a thermostat that is only divided into heating levels, you will not be able to enter exact temperatures.

After some time of heating, however, you will find out through experience exactly which heating level you feel comfortable with.

Most of these simple thermostats also have a frost protection level. You can set this especially in winter when you are away for a longer period of time and assume that no pipes will freeze. With higher-quality models, you can set the exact temperature in the thermostats. For example, if you set the temperature in the bathroom to 24 °C, the room temperature will reach the actual value.

Time control

If you are often out of the house on a regular basis, it is worth buying thermostats that allow you to set heating times. This does not only mean the night setback, but also other times when the house or flat is unoccupied. It makes sense for the heating to turn down automatically.

This function is also only available with the newer electric or intelligent thermostats. With the help of the central control of all thermostats, you can enter times when the heating is to be turned down a little or a lot.

Heating control inside or outside the house

For intelligent heating control, you definitely need a WLAN-capable or Internet-capable system. The biggest advantage here is that the heating can be controlled from outside the house. So if you often come home unpredictably later than you intended, you can easily control the room temperature in your home while you are away.

Of course, this also works the other way round, for example if you suddenly come home earlier in winter. Then you can switch on your heating just as you are on your way home.

No matter what you do: whether you come home earlier or later - you will always find your comfortable temperature when you enter your home.

Of course, you can use your smartphone not only to switch your heating on or off, but also to completely monitor the entire heating system.

Window detection

The "window detection" accessory is now standard with many thermostats. The small additional part is attached to the window and is connected to the thermostat.

This additional part only makes sense if the window has to be opened often. This can be the case, for example, if there are always a lot of people in the room and it therefore has to be ventilated often. (Image source: / SKitterphoto)

If the window is now opened, the thermostat receives a signal and switches down. This prevents the thermostat from switching up due to the colder air from outside and consuming useless energy.

Connection to a weather app

True techies will love this feature: the connection to the weather forecast. With some intelligent heating controls, you can specify the connection to a weather app.

Based on the forecast data, your heating system will automatically set itself to the right temperature.

With this method, you can also do without the sensor to the outside temperature - provided that the weather forecast delivers reliable results.

Facts worth knowing about heating control

What is the optimum room temperature?

Of course, everyone has their own comfort temperature. You will also have your own preference as to how high a room temperature should be. Basically, you should distinguish whether the rooms are used for living - i.e. moving around - or for resting. In summary, here is a small overview of the recommended room temperature for different rooms:

type of room temperature in Celsius
bedroom 18
living room 20 - 22
bathroom 23
kitchen 19
children's room 22
pantry 18
swimming pool 28

Ventilate properly when heating

To save energy, you should not only heat optimally, but also ventilate properly. Especially if several people are in one room, it is important to completely exchange the stale air. But regular ventilation is very important, because otherwise mould will form in the rooms.

Cooking, showering, washing clothes or sweating in general creates moisture in the air. If this moisture is not regularly removed by opening the window, mould will form on the walls. Mould growth is not to be trifled with and can be very dangerous to health.

Under no circumstances should you leave the window permanently tilted.

In living rooms, you should therefore open the window completely 2-4 times a day and air the room completely for a few minutes. In the kitchen, you should repeat this procedure more often, especially after cooking.

If in doubt, measure the humidity

If you notice condensation on your windows, the rooms are either not heated properly or not ventilated properly. Window panes are the coldest objects in the room. If there is too much moisture in the room air, it will first settle on the window panes. If you are not sure how high the humidity in your rooms is, you should buy a hygrometer.

These devices are not that expensive to buy, but they can give you valuable information about your indoor air. In winter, the humidity should not exceed 50 %. Any values above this can lead to mould growth.

Image source: / Olivier L.

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