At certain temperature outside and certain temperature inside, humidity condensation on the inner surface of a metal door in the autumn-winter period is inevitable. This physical phenomenon can not be undone. But with understanding of the the essence of the processes, this problem can be greatly reduced.
In order to reduce condensation on the door, it is necessary to increase the surface at which condensation occurs. This is achieved by wrapping the door with panels of low thermal conductivity. The Steel Line company strongly recommends to install only those doors intended for outdoor usage, namely doors for the house in the series Sever, 80U and 100U.
Another way to reduce condensation is to decrease the temperature and humidity in the zone around the metal doors indoors. This can be achieved by ventilated vestibule, closing of the second door with a good sealing of the porch door's peremeter.
Consequently, the right choice of front door (for apartment or house), the execution of all construction standards and requirements, as well as the rules of operation can reduce condensation on the inner surface of the front door in the autumn-winter period.