Return grilles G1S have 1 row of fixed blades, 45⁰ inclined, parallel to the 1st dimension. They are suitable for use in air-conditioning and ventilation systems and wall, roof or air-duct placement, for indoor air exhaust.

Return grilles G1S can be manufactured from anodized aluminium, aluminium painted in RAL color, from galvanized or stainless steel and copper :

• G1S... : Blades & frame from anodized aluminium or aluminium painted in RAL color.
• G1S... | C : Blades & frame from copper.
• G1S... | GL : Blades & frame from galvanized steel.
• G1S... | I : Blades & frame from stainless steel.

It is possible to manufacture G1S grilles from PVC plastic, under request.