Basics and importance of ventilation
Ventilation systems have been around for thousands of years. As early as 2650 BC It is proven that the Egyptians built the first ventilation system to supply the pyramid of Cheops with air. Even then, people recognized the benefits of healthy indoor air: less tiredness, better concentration and generally greater wellbeing. The British natural scientist Stephen Hales set another milestone in ventilation technology: in 1740 the concept for a ventilation system was created, which is still used today in almost all ventilation areas in a further developed form.
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With increasing technological advances in the construction industry, residential buildings have become better sealed to prevent energy loss in the form of heat. This also reduced the air exchange within the building, which was otherwise secured by joints and cracks. In order to ensure a sufficient supply of fresh air, the first controlled mechanical room air devices for private use were developed in 1969.
82 percent of the energy consumption in private households is used for heating and the production of hot water. This creates an enormous potential for saving energy. In order to use this potential, various regulations such as the Energy Saving Ordinance (EnEV) require a more compact construction. In concrete terms, this means better insulation of the masonry, windows, roofs, floor slabs and joints. Such an “airtight construction” prevents energy and heat losses. The energy-saving construction results in a clear cost advantage by lowering the annual operating costs, since the consumption of heating energy and hot water is reduced. The following article explains exactly what “energy-saving construction” means, how great are the benefits and potential, and what specific measures apply to individual components.
The energy requirement of a building is planned using the components heating, hot water and ventilation. When ventilating, window ventilation is usually assumed. The Central European thus pays the costs for an energy requirement of 32 kWh per square meter and year (kWh / m²a) with the assumed window ventilation to maintain the room temperature. This value was determined statistically taking into account the duration of the heating period, the recorded outside temperatures and our geographical location. In a house with an annual primary energy requirement of 60 kWh / m², 50 percent of the energy losses are caused by window ventilation alone. In the following article, energy-saving measures through thermal insulation, modern windows and decentralized ventilation systems for heat retention as well as heating with renewable energies are explained and you are presented with further funding options for energy-efficient renovation.
Ventilation systems in comparison – the inVENTer-Check
The ventilation market is changing. Central ventilation systems ensure a constant exchange of air, but are often built with complex pipelines, which can be a major challenge for owners when renovating. The fact that the installation of central ventilation systems is no longer absolutely necessary is thanks to the development of decentralized ventilation systems. Due to the stricter legal requirements and the constant further development of the ventilation systems, decentralized ventilation devices with heat exchangers were created. With today’s common ceramic heat accumulators, these solutions are particularly efficient and environmentally friendly. The following article gives you an overview of the possibilities of ventilation and their individual advantages and disadvantages.
Ventilation system in the house
On average, we spend around 90% of the time indoors – the air we breathe in is often polluted with pollutants that escape from plastic, home textiles, wood stains or cleaning agents. Moisture also collects in inadequately ventilated living spaces and can lead to the formation of mold. As recently as 20 years ago, houses were built in such a way that air could naturally circulate in the house through more permeable building envelopes. In combination with regular intermittent ventilation, unpleasant side effects of stale and humid air can be avoided.
Noise development and noise during ventilation
What is meant by sound? How can you reduce the noise in ventilation? We have dealt with this term and pass on our knowledge to you. The human ear, as a sensory organ for picking up sounds, not only perceives them as quiet or loud, but also as pleasant or unpleasant. In addition to the physical laws, the physiological relationships due to the subjective hearing sensation are therefore also important when evaluating noise. The sound pressure level is perceived by the human ear, which changes depending on the room and the distance from the sound source. You can find more on the subject of sound, standard sound level difference, sound pressure and the possibilities for sound reduction in this advisory text.
Heat recovery in ventilation
Fresh air in the living room without the apartment cooling down? Ventilation systems with heat recovery are now the status quo on the ventilation market. They are energy efficient, reduce heating costs and protect the environment. There are various technical ways to achieve heat recovery. The basic principle, however, is the same: thermal energy from the exhaust air is used to warm up the colder supply air. In the following guide you can find out which methods are used and how they are implemented in controlled residential ventilation.