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Suction of building gases

SKVTechnik reports on the use of side-channel compressors. This article explains the principle of air extraction under buildings.


Within industrial buildings, processes are often carried out that produce gases. If these gases are heavier than air, you will sink to the ground. This is not dangerous at first, but if these gases slowly penetrate through the floor slab of the hall into the underlying foundation, the hall can become a powder barrel. The gases collected in this way in their individual mixture can give an explosive mixture. If the gases have reached a critical concentration because more and more gases have accumulated over time, explosions can occur.

A remedy for this situation is created by the fact that these gases are specifically collected and transported away from the substructure of the building or hall. A side channel compressor connected to the collection unit draws the air continuously or via a control system via a pipe system and ensures that critical concentrations of explosive gas mixtures are not reached with the simultaneous intake of fresh air.


The schematic diagram shows how the side channel compressor is connected to the gas collector via a pipe system. The side channel fan draws the air out of the foundation below the building above it and blows the air back to the outside of the building. If a correspondingly designed foundation ventilation is provided, it is also possible to select the opposite path and blow out the gases from the foundation by means of compressed air. The air output that the connected side channel compressor has to promote depends on the size of the hall, the gas volume and the concentration of the gas mixture under the hall. In the case of corresponding data, the design department of SKVTechnik can be allowed to carry out calculations for customers.


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