Profile: GDL Air Systems Ltd. specializes in air distribution products and servicing the construction industry. We provide architectural louver solutions, solar shading & penthouse louvers, air terminal grilles, diffusers & louvers, duct dampers, fire dampers & smoke control products. Our range of fire dampers are designed to stop the spread of fire through ductwork, walls, floors, and ceilings. The Slimline range is especially suitable for narrow partitions or in-duct mounting.