FIELD: building units, particularly doors. SUBSTANCE: sealing system has doorstep and case with door leaf. Doorstep consists of two profile members. One profile member is installed indoors, another profile member is located outdoors. Connection profile and sealing profile extending along doorstep, around door leaf and door case are arranged between said profile members. Sealing strip is installed above doorstep. Sealing strip has narrow sealing facet. Sealing slat having sealing facet is located opposite sealing strip on lower side of door leaf. Sealing system has additional sealing angle bar with sealing facet located at lower ends of door leaf. Angle bar is secured to door leaf and interacts with sealing pad arranged into case for sealing thereof. EFFECT: increased door tightness to moisture during showery rain, improved thermal insulation. 5 cl, 2 dwg
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