The main prefabricated components for louvre air intake and
exhaust units include: exhaust frame profile with marked
locations for WGO self-drilling screws, louvre blades which
shield the opening from rain and birds, and side angle corner
piece.
The fabrication of air intakes also requires using SIA
wire mesh, size 12.7x12.7 mm. The frame profile and the blades are
also available in aluminium sheet.