PACMAN in situ in Auckland. Left top: 7 PACMAN units (white and transparent casings shown) measuring in a test home. Air quality sensors are on the top row and motion/distance sensors in the front. Bottom left: A suite of high quality research instruments for measuring particles and carbon monoxide/dioxide used for calibrating the PACMAN. Right: An ordinary Auckland home, used by the NIWA team for testing the PACMAN technology. Credit: Ian Longley