Osbournes Ltd (formerly Osborne-Hume Grilles & Louvres Ltd) commenced manufacturing in 1979 and offered an increasing range of louvres and grilles for commercial applications; designed to our client's specific requirements. Osbournes continue to supply the quality louvres and grilles that we've become know for—manufacturing and installation where practical. Osbournes Ltd is a New Zealand owned company which designs, manufactures, powder coats and installs aluminium commercial ventilation diffusers, grilles, louvres and sun louvres.