For this purpose you can order a door with a mechanical threshold which stops draughts and meets the highest aesthetic demands of the door.
For this door we recommend veneer or artificial materials such as CPL and HPL which are more resistant variants of laminate.
There is no simple formula for such calculation. It depends on many circumstance 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