On the part or all part of outside wall curtain wall structure which set glass can be installed for air circulation and can keep seal condition by using locking device including handle. 
 It can be combined and assembled in various way and it can be made to exposed and hidden curtain wall. Besides it has combinable and constructible structure selectively. Its size can be changed easily by using frame in common. In addition, by using dual insulation structure (polyamide+polyurethan), make it possible to improve insulation,  airtightness performance and effects of soundproof. Furthermore, it can be used various glass size(24mm~42mm).