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They stop humidity penetration to the doors
They have three categories determined according to the different climate in front of and behind the doors
They are an ideal solution for the transfer from non-heated rooms
Select the doors with regard to the environment - climate, the place of fitting. This is the way to prevent door bending or twisting. Due to the special structure of the door the humidity does not get to wood. Part of the internal structure of a door wing is the aluminium layer, which protects the door from deformation. The modification "climatic" is applicable to the production of full models (non-glazed) only.
The new standard defines the "climatic" resistance of A, B, C. Each door is resistant at A level. Increased resistance B and C must be given on the door plate which you can usually find on the vertical side (at hinges).
Refer to the designer of your construction with your request. It is necessary to measure different humidity during the winter period by hygrometers over a longer period to get objective data.
There is no simple formula for such calculation. It depends on many circumstances which define saving. For example the difference in temperatures between two rooms.
taught us to make really good doors
know SAPELI, but our home is in the Czech Republic
All of them custom made
tested lifetime of our doors and components