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This Environmental Product Declaration (EPD) is for business to business communication. This EPD refers to the Concept System® 77 door. This system includes a high-quality flush door system, which meets the elevated requirements regarding thermal insulation, stability and security. CS 77 doors are offered with different threshold solutions to perfectly match all comfort and aesthetic requirements. To ensure the tightness of the door, specially designed insulation strips are used to avoid possible bending of the element, caused by temperature difference between the in- and outside of the building.