What to look for when choosing a ventilation system?

Ventilation systems improve the air quality in the entire house and contribute to energy saving at the same time. The automatic ventilation exchange allows the windows to remain closed, so that the heat generated via the heating remains in the room. You enjoy your comfortable temperature in the room and still have fresh air. To benefit from the advantages of a modern ventilation system, you should consider important aspects when choosing the right ventilation technology.


How to find the right ventilation concept for your living situation

Stale air, unpleasant odours and the formation of mould due to excessive humidity: there are enough reasons for regular ventilation. Especially in winter, however, constant ventilation has its proverbial price: the expensively generated heat gets back outside through the open windows.

In addition, buildings today are built as airtight as possible to prevent heat loss. Classic window ventilation is hardly sufficient to create the desired indoor air quality. An individual ventilation concept with a ventilation system adapted to the building situation and the usage habits of the rooms is needed.



Central vs. decentralised ventilation

When choosing a ventilation system, you can decide between centralised and decentralised ventilation. The biggest difference between the two systems is their function. While decentralised ventilation is installed in each room and works individually and across rooms, central ventilation is more suitable for large areas.

Advantages of decentralised ventilation:

  • High energy efficiency
  • Implementation of individual ventilation concepts
  • Simple installation without additional piping
  • Flexible installation location
  • Individual control options

When installing a decentralised ventilation system, it is also possible to install it in individual rooms only. This brings decisive price advantages compared to central ventilation systems.


With or without heat recovery

There are different types of systems, either with or without heat recovery. Pure exhaust air systems are ideal for functional rooms such as the WC or utility rooms. Exhaust air is transported outside via air ducts and fresh air is returned to the room through special external wall diffusers.

Ventilation systems with heat recovery are highly efficient. Rooms are equipped with fans that have a heat recovery function. Fresh air flows into the rooms through special fans without causing high energy losses.

Note on combined systems

Lunos also offers combined systems for demand-oriented living space ventilation. In this case, functional rooms are ventilated cost-efficiently via pure extract air systems, while living rooms and bedrooms are equipped with a ventilation system with integrated heat recovery.



If you decide to retrofit a ventilation system, make sure that the system is designed for retrofit installation. Particularly in old buildings and even in listed buildings, decentralised ventilation systems can even fulfil the requirements of listed building protection through clever installation.



The EnEV now places strict requirements on the energy efficiency of new buildings. Even in the context of refurbishment projects, building owners must ensure that the building is equipped with an appropriate energy level. If you decide to install a ventilation system, make sure that it is energy-efficient.


Government subsidies

If a ventilation system can significantly improve the energy-saving potential of a house, then the state rewards its installation with appropriate subsidies. To ensure that the investment in your ventilation system is also financially worthwhile, pay attention to the eligibility for subsidies when purchasing. So it's good to know that ventilation systems from LUNOS are eligible for subsidies due to their high efficiency.

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