Bringing together the scientific and the practical knowledge, VISIONS set realistic targets for the resolution of the IAQ and energy consumption issues. Delivering the baseline of the promising photocatalytic methodology, VISIONS project aims at improving the quality of the indoor environment while it will enable significant energy savings in buildings. Therefore, VISIONS offers a potentially fertile ground for encouraging local authorities to adopt a more integrated approach to urban management by informing stakeholders to use those techniques and methods which have been positively assessed and have successfully been tested for their performance in terms of improving IAQ and energy saving.