Is that when

The idea of ​​strengthening eternal permafrost is that when building a building is laid in the soil slightly higher than the sole of the foundations, special ventilation pipes after 3-4 m, according to which cold frosty air is driven through the centrifugal pump, which causes artificial freezing around the soil around the laid pipes. The use of artificial cooling should be widely used in factory construction and in the construction of furnaces or hot workshops.