Depending on the power of the installed heaters and on the amount of air flowing through, the air temperature increses by 2 to 8oC. This small increase in the temperature results in a significant decrease in the air relative humidity. Air with low relative humidity can absorb water from wet grain stored in silos. The standard heater is configured only for work with the PPZt-7.5-WNT ventilator produced by BIN. Standard heaters can work in silos where air inlet has a diameter of f310mm. In other cases it is necessary to adjust the heater to a given air inlet installed in silo.