Wall heating - the disadvantages


Wall heating today is what a few decades ago was underfloor heating - one of the most popular heating techniques. After all, it brings numerous benefits. However, there are also disadvantages with the wall heating. Find out more about the disadvantages, but also about the advantages of wall heating here.

Wall heating - modern but not really new

Although the wall heating may seem like a completely new heating system, it is rather antique. Because even the ancient Romans used this kind of heating. But even the large tiled stove takes up this technique of warming up. Which technique is it? In principle, two techniques are distinguished:

  • convection heaters
  • Heat radiating heaters

Convection heat versus radiant heat

The usual hot water central heating is a convection heating. The air in the room is heated. In the case of radiant heating, on the other hand, the room air is hardly heated. Rather, illuminated bodies and objects are heated. Therefore, a campfire warms in cold temperatures.

Significant advantages of wall heating over convection heat

Thus, the room air does not have to be heated so much. This is a significant advantage of wall heating. From an indoor air temperature of 18 degrees Celsius, there is an additional energy requirement of six to seven percent to raise the temperature by one degree. With wall heating, people in the room feel that the temperature would be 21 degrees, when in fact only 18 degrees. So there is a lot of energy saving potential in the room.

Also, the risk of mold can be lowered

Since the room air is heated less, it also carries less moisture. Therefore, such a wall heater can cause true miracles even against mold. Not to forget that it also warms the outer wall, so the mold endangered wall. Because the wall heating should always be installed in the outer wall.

Operating principle - the thermal properties of the wall heating

But we already come to the disadvantages. Why in the outer wall? Let's first discuss. The outer wall is usually the coolest wall in a room. Some convection heat is also produced by a wall heating. The heat rises, on the cool wall creates a "suction effect". Here the warm air falls off, as it cools more and more. This cool air on the ground is now "sucked" again by the wall heating.

Disadvantage of wall heating: Installation preferably on the outer wall

Now, if the wall heating on an inner wall and the outer wall may be poor or not insulated, the cooling is noticeable. It creates a continuous feeling of cold feet. Therefore, the wall heater is conventionally mounted on the outer wall. Interior walls are less cold, which is why the air now cools much less.

This additionally increases the requirements

However, so that the heating costs do not rise, the outer wall must be insulated accordingly to the outside. Otherwise, much of the heat would be emitted to the outside. That would increase the necessary flow temperature and thus the energy requirement. Therefore, wall heaters in old buildings without insulation rather unsuitable, as long as no insulation was made.

A wall heating needs a lot of space

In addition, the strength of a wall heating lies in the radiant heat. Therefore, the heat radiating surface must be as large as possible. However, this is further restricted by window areas. Therefore, the wall heating is often extended in such cases to other walls.

A good balance of pros and cons

But here are also practical disadvantages. Since the heat is radiated, the wall surfaces with the heater must not be supplied with furniture over a large area. Otherwise, only this furniture will be heated. The pros and cons must therefore always be weighed well. But it still goes on. Like underfloor heating, these are pipes laid in the wall.

Practical disadvantages of a wall heating

Punching a nail into a wall or drilling a hole for a dowel could damage the wall heater so much that the whole wall has to be opened. Here is another disadvantage of wall heaters revealed. If there is damage in the pipe system, the plaster must be knocked off the wall over a large area. With a professional installation of high-quality components, however, this is extremely rare.

Tips & Tricks

It is therefore important to weigh the disadvantages and the advantages always good. It is important to contrast pros and cons in detail. However, in certain rooms, such as the bathroom, the wall heating actually offers almost unbeatable advantages.

Product Image: nikkytok / Shutterstock


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