Our sound insulation fans

We want the user to feel comfortable within their own four walls. That's why the engineers at LUNOS have developed a range of sound insulation solutions. In the e²60 sound insulation brochure, you can find out how to put together your perfect e²60. In the LUNOS design tool you can now determine the values yourself depending on the combination and wall thickness.

Sound insulation fans

Studies repeatedly show that more than 50 % of the German population feel disturbed by road noise. The number of people who are exposed to excessive noise pollution on a daily basis and suffer from health problems as a result is no less high. To prevent this, high-quality sound insulation is required to counteract the sources of noise from outside. We at LUNOS have been committed to their development for many years. With us, everyone can find the right ventilation and soundproofing solution to make them feel comfortable again within their own four walls.

Sound insulation requirements for modern ventilation systems

Buildings in urban centres are becoming ever more cramped and noise pollution is increasing. At the same time, modern buildings are being built ever more densely. This creates a problem. On the one hand, the dense construction requires a special technical solution for adequate ventilation. On the other hand, this increases the noise input from outside. This results in the need for a ventilation solution that ensures a sufficient supply of fresh air on the one hand, but also minimises traffic noise from outside and generates as little noise as possible. The set volume output, the room dimensions and special façade components that can influence the sound behaviour of the ventilation must be taken into account.

Even if a system is labelled with a very high sound insulation value, e.g. 75 dB, this is often only achieved with a very low volume flow and an optimum installation position. It is therefore important to seek detailed advice from a specialist before deciding on a decentralised ventilation system. The focus should not only be on the sound-insulating ventilator itself, but also on factors such as the room parameters and the building fabric.

The relationship between ventilation performance and sound insulation

Ventilation units have the important task of supplying rooms with fresh air and thus ensuring a pleasant indoor climate. In order for them to fulfil this task effectively, it is important to create a suitable ventilation concept. If, for example, a larger volume of air is to be exchanged, it may be necessary to install several devices or to select versions with a larger volume flow or a higher air flow rate.

To ensure that this exchange is acoustically imperceptible, modern ventilation systems are equipped with sound-insulating components. However, there is a direct physical relationship between ventilation performance and sound insulation. If a higher volume flow is required, there must be a larger inflow area for the air. This makes the required device larger, which in turn leads to a higher sound input. On the other hand, a completely soundproofed system would significantly reduce or even completely eliminate the ventilation function. So if the user wants to realise the maximum values specified by the manufacturer - for example in terms of volume flow - this cannot be achieved at the same time as the highest possible sound insulation values. Similarly, maximum sound insulation values are only possible if the volume flow is low. However, this in turn leads to a reduction in ventilation performance.

Buyers are often unaware of this connection as it is not sufficiently communicated by many manufacturers. For reasons of better marketability, only the highest possible sound insulation value is stated. However, individually varying factors such as different wall thicknesses or the required volume flows usually do not allow for the theoretically possible maximum sound insulation. In practice, this often leads to problems - for example, when ventilation systems are to be replaced and retrofitted and the devices with their maximum value specifications do not match the wall thicknesses in the building.

In addition, the sound insulation in appliances is often located in places where condensation and dirt can lead to unhygienic contamination that is almost impossible to remove. It is therefore advisable to choose systems that are precisely tailored to the respective area of application and guarantee high functional stability in the long term.

How building physics influences the sound insulation of ventilation systems

In addition, there are other factors, such as building physics, which influence the actual sound insulation performance of the ventilation. For example, the room dimensions must be taken into account when determining the installation position and height. This avoids reverberation effects, which are particularly intense in larger rooms. If the ventilation unit is installed in a very unfavourable position, e.g. in a corner, this can result in the sound being reflected particularly strongly into the room, which significantly increases noise pollution.

Façade components can also have a negative effect on the background noise. If, for example, the windows only have very low sound insulation with sound insulation class 2 or worse, even ventilation components with high sound insulation can no longer do much. The noise then penetrates through the window and simply drowns out the noise from the ventilation. The actual acoustic disturbance level can then be incorrectly assigned.

Needs-based planning is the key

These examples already show that ventilation is only ever one part of a comprehensive sound insulation concept for residential buildings and should therefore never be considered in isolation. Rather, it is important to find the specific sound insulation values for the respective ventilation scenario. It is not so much about the maximum possible technical values of the individual components, as these can only be achieved under certain conditions. Rather, it is important to always consider the actual sound insulation performance in relation to the respective volume flows and taking into account the wall thickness and building fabric. The data collected is then discussed with an expert. It may turn out, for example, that several units need to be installed in order to achieve the desired performance with the highest possible sound insulation.

High-quality sound insulation products from LUNOS

LUNOS is the first choice when it comes to fresh air and peace and quiet. Here you will find a large selection of high-quality sound insulation products that ensure an even flow of air through your rooms. The e²60, for example, achieves a standard sound level difference of 67 dB, the LUNOtherm S+ even up to 74 dB. There is something for everyone here. We will be happy to advise you on all your questions.