Intelligent Purification Ventilation Soundproof Device Core Selling Points The structural design advantage solves the problem of inadequate sealing in sliding doors.Uses low-e coated insulated glass with warm-edge spacers to ensure thermal performance.Installed on the balcony, it is unaffected by the harsh outdoor environment while allowing maximum enjoyment of sunlight and views.Sealing strip: EPDM three-component foamed composite sealing strip.