RESEARCH BACKGROUND: This instalation used a series of technologies and techniques to generate a precetually rich imersive environment. The work connects to an important development in contemporary practice and theory investigating the aesthetics of perception as a critical aspect of experiencing the 'lived' space; linking to the work of practitioners such as James Turrell, Olafur Eliasson, Philippe Rahm, Fujiko Nakaya and Juhani Pallasmaa. RESEARCH CONTRIBUTION: Sited in an old homestead that has recently been renovated into a gallery, 'Night Window' prompts discussion about how a room's perceptual properties are affected by removing the ability to open and close its windows, provoking the question: By 'adding' a controlled atmosphere, what is it that has been removed? This installation also explored how perceptual qualities within a space can alter over time as the activities that occur within that space change. Using a number of perceptual 'tricks' to generate the impression of an open window on a summer's night, with a gentle rainstorm brewing outside - fragrant moist cool air, a sound-scape, and rhythmically billowing curtains activated by gentle aperiodic air currents. Although the intent was to provoke discussion rather than point towards a possible design intention, the overall perceptual effect was surprisingly persuasive, revealing how the combination of a number of atmospheric phenomena can generate rich immersive perceptual qualities and experiences. RESEARCH SIGNIFICANCE: 'Night Window' contributes to a larger body of research investigating the design of interior air and atmosphere. Here, exhibitions are treated as laboratories where research is made public and the engagement of visitors is used to inform the design investigation. With over 3500 visitors, numerous tour groups from educational institutions, well attended lectures and media coverage, this exhibition was highly successful in achieving this objective.