Ventilation system: Helpers in the background for fresh air


It's hard to imagine modern buildings without a ventilation system. It keeps the indoor air clean and fresh without you having to do it yourself. Manual ventilation through open windows or even doors is almost a thing of the past with a ventilation system.


What can a ventilation system do?

The ventilation system usually consists of one or more ventilation units that ensure the exchange of air in rooms and entire buildings. The various devices in a ventilation system work as a team. For example, it is possible to take into account the different usage frequencies of the various rooms and automatically ventilate the frequently used study much more intensively than the rarely used guest room.

A ventilation system is available in various designs. It can be controlled centrally or decentrally, equipped with heat recovery or sometimes even replace the heating system. But no matter which version you choose: thanks to the ventilation system, you not only always breathe in fresh, but also filtered outside air. This is because before the ventilation units release the air from outside into the interior, it is passed through various filters. Pollen and pollutants must therefore remain outside.


Where is a ventilation system particularly useful?

A ventilation system ensures an all-round healthy indoor climate through regular and needs-based ventilation. This is not only extremely good for us humans, but also for the walls, as mold is a thing of the past with a well-coordinated ventilation system.

In new buildings and particularly energy-efficient houses, the ventilation system is not just an option, but a must! This is because new buildings lack cracks and leaks in the masonry, which means that "automatic" ventilation is not possible. The ventilation system takes over this task. With its constant work, it keeps the air fresh at all times and prevents the formation of moisture in room corners and behind cupboards.


Advantages and disadvantages of the ventilation system


  • Acquisition costs usually mean additional expenditure, which is particularly noticeable when you already have a lot of expenses, e.g. when building or moving house

However, these costs are offset by a number of advantages.


  • The ventilation system with heat recovery saves a lot of heating energy and therefore also costs
  • Over the service life of the ventilation system, you often save more money than was spent on the purchase
  • With a ventilation system, you always enter a home with a fresh indoor climate, no matter how long you have not been at home or ventilated it
  • The temperature and ventilation intensity can be controlled per room
  • With a ventilation system, it is no longer necessary to leave the windows "tilted open" when you are not at home. This also provides greater protection against burglary
  • Thanks to closed windows, it is much quieter within your own four walls, even if you live on busy roads or near train stations, airports or industrial areas
  • Thanks to the needs-based, automatic ventilation, mold and moisture no longer stand a chance - even allergy sufferers will quickly notice this
  • Accumulated pollutants are quickly removed from the inside to the outside and new pollutants are not even let in. The air is not only fresh, but also healthy


Central ventilation system vs. decentralized ventilation system

When it comes to the controlled ventilation of living, working and utility rooms, there are two main types - centralized and decentralized room ventilation. The function of both types of ventilation is to remove low-oxygen air with a high carbon dioxide and water vapor content and to draw oxygen-rich fresh air into the rooms. The main difference lies in the way they work.


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Central ventilation system:

In centralized systems, a single unit supplies fresh air to all rooms. The central unit, consisting of a ventilation unit and fans, is installed in the wall or ceiling and connected to the various rooms via a connected air distribution system.

The integrated ventilation unit draws in the fresh outside air and feeds it into the living room, children's room and bedroom via a heat exchanger. At the same time, the warm exhaust air from the kitchen, bathroom and WC is drawn into the unit and also fed through the heat exchanger. In this way, the heat from the exhaust air is transferred to the supply air, resulting in effective recovery. The cold exhaust air is led outside via exhaust air ducts.

The main advantages of central ventilation are its high air volume flow, low noise level and easy maintenance. As the planning effort is somewhat higher, they are mainly used in new buildings. However, they can also be integrated into old buildings in the course of modernization.


Decentralized ventilation system:

Decentralized ventilation systems are installed specifically in individual rooms. They are not normally connected to an air duct system and are installed directly in the outer wall. There are three basic types - ventilation units with heat recovery, exhaust fans and hybrid systems.

A ventilation system with heat recovery has a heat exchanger. This transfers the heat from the exhaust air to the incoming outside air. Its efficient operation allows up to 90 percent of the heat to be recovered.

Exhaust air systems are mainly used in bathrooms, kitchens, utility rooms and other functional rooms. Here, a fan transports the used air either directly to the outside or via exhaust air ducts, with fresh air being fed in.  At LUNOS, they are also available as hybrid systems with heat recovery.

Decentralized ventilation systems offer the advantage that they can be retrofitted with comparatively little effort. This makes them particularly suitable for older buildings - both apartments and detached houses.


Discover the ventilation systems from LUNOS now

At LUNOS, we offer a large selection of high-quality ventilation systems for every need. Our product range includes decentralized ventilation systems with and without heat recovery, exhaust air fans, façade elements and much more. If you have any questions, we will be happy to assist you with our expertise and experience.