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Air recuperation



Air quality impacts significantly on the well-being and health of people. The majority of people spend in the interior around 70 – 80 per cent of their entire time. Here the air quality is impacted on by harmful evaporation of chemical substances from the furniture, construction materials, primers, coats, tobacco smoke, micro-organisms, humidity and odours. One of the possibilities is the application of the principle of controlled ventilation utilizing the air recuperation for securing the well-being in the residential buildings. Recuperation units look after the healthy environment without dust, pollen, humidity and noise, whereas respecting the ideal humidity of the interior premises. The controlled ventilation has a controlled input and output of air, and hence further elements of optimization may be used for reducing the energy burden of the house, as for instance mechanical ventilation heat recovery, circulatory operation, thanks to which the building enters the category of low-energy and passive constructions. Recuperation units see to the healthy environment around us without the presence of dust, pollen, humidity and noise, while maintaining the ideal humidity of the interior conditions, ambient environment.

Polluted air is sucked back from the kitchen, bathrooms, toilets and corridors via the recuperative heat exchanger, where it transfers the heat to the outer filtered fresh air, which on the other hand, is tunneled into the residential premises with a very high efficiency. The efficiency of the counter-current heat exchanger is at around 90 per cent.


Pursuant to the standards of STN and EU for maintaining hygienically recommended values of the fresh air distribution, with regard to the controlled ventilation the airing intensity of 0.3 to 0.5 hod-1 is recommended. The mass of fresh air per one person is set to be 25 – 30 m3/h.


Advantages of air recuperation:


  • elimination of external noises from the outer environment, closed windows
  • filtration of fresh air: pollen, dust, chemical vapours to remain outside
  • suction of humid air from the residential premises, elimination of mites and mildews spread
  • suction of polluted air from the residential premises
  • reduction in the energy losses which leads to the reduction of costs for heating



The recuperation unit consists of:

recuperative heat exchanger with a by-pass, filters, fans, system of regulation, controls, sensors, insulated housing



More information on the topic of air recuperation to be found in the Enclosure: Recuperation – Brochure.