At the time of choosing an iron entrance door, especially one that opens directly onto fresh air, it is obvious to react to one of its first characteristics, which is thermal conductivity. This is most relevant in favor of suburban country houses, houses and cottages. It will only be possible to assess the quality of this characteristic as soon as a steel door is installed and a restrained atmospheric period begins. How to avoid mistakes in preference when buying iron doors? No matter how trite it will be to rumble, but first, ask the seller or manufacturer for certificates of the trait.
In real time, certification of iron doors is carried out in accordance with GOST 31173. This important document designates entrance iron doors according to 3 standard classes: M-1, M-2 and M-3. The highest quality doors will be available in class M-1. Of course, when choosing high-quality iron doors, it is much better to turn your attention to famous manufacturers who have shown themselves, such as the MeKon trademark, which has been operating in this market for another 10 years.
During certification, iron doors undergo a round complex set of technological decompositions, which make it possible to evaluate their similar features, such as thermal insulation, thermal conductivity, sound insulation, air permeability, strength, corrosion resistance, etc. Only carry out about 8 types of decomposition of the iron door.
If you choose iron doors in favor of replacing them in a multi-storey apartment at home, then the thermal conductivity of a door like a door will not be of particular importance, compared to a private building, where the door is exposed to the whole complex of influences of the rear environment. Thermal conductivity tests of iron doors are aimed at evaluating how many periods the front door will not be able to leak cold into the building at a temperature difference of 40 ?C (-20 outside and +20 inside).