NATURAL VENTILATION APPARATUS WHICH IS INSTALLED AT WALL FOR MAXIMIZING VENTILATION AMOUNT

摘要

PURPOSE: A natural ventilation apparatus which is installed at wall and is easily and elastically connected to insert outside cylindrical cap without separation.;CONSTITUTION: A natural ventilation apparatus which is installed at wall comprises a louver assembly (100) in indoor. The louver assembly comprises a cylindrical cap (110) in indoor side. The cylindrical cap comprises: a cylinder part (111) which is inserted to the indoor side end of sleeve (S); a control valve installation groove which contacts with the indoor side end of the sleeve and indoor side of wall; an insect net installation groove, flange unit (112) having extension part, blocking piece (113) which is installed between the cylinder part and flange, and vent (114).;COPYRIGHT KIPO 2010