After the duct system is completely thermal insulated, the probability of the formation on the walls of condensate is immediately discarded. In addition, during the Rokvul thermal insulation device, the duct acquires resistance to fires, and this can prevent the distribution of fire on the system. In most cases, the main problem, a characteristic air duct during operation, is the free spread of cold flows. Thus, condensate formed from the outside can lead to the beginning of corrosion processes, as well as the destruction. To prevent such a nuisance, it is important that the air duct temperature is at the level of the temperature of the room.
If we talk about the materials, then the isolation device should be taken into account that thermal conductivity is not high, as a result of which steam will not form. The next point is the choice of material should proceed based on the street temperature. As for moisture absorption, this, unfortunately, is inevitable, since this is a continuous process. The noise distributed by the system will help the noise.