This paper discusses the Glasgow School of Art in the context of the wider history of the Victorian art school as a distinctive building type. It explores the precedents for the school in Manchester, Birmingham, and London, and reveals that its design was informed by predominantly environmental considerations. The internal spaces of Victorian art schools display an unprecedented qualitative concern for the provision of light in the context of the soot-laden skies of the industrial city. The Glasgow School of Art was also equipped with a mechanical plenum system that provided clean and tempered air in variable quantities to the different spaces of the building. The innovativeness of this system has been widely disputed - this paper aims to c...