In the frame of a LIFE19 project named “VISIONS”, an innovative photocatalytic paint was produced for healthy environment and energy saving purposes. To that end a photocatalytic powder was optimized in order to be mixed in paints without downgrading paint physical properties and to reduce production cost. The photocatalytic efficiency of the powder as well as the VISIONS photo-paints was evaluated in both lab and real scale applications. Lab-scale tests were performed in a continuous tank reactor in order to quantify the capacity of VISIONS photo-paints to degrade photocatalytically inorganic (nitrogen oxides NOx) and volatile organic (VOCs e.g toluene) air pollutants under both Visible and UV irradiation. Real-scale tests took place in Demo-houses (picture 1) and currently in the Hellenic Naval Academy building where VISIONS photo-paints are monitored with regards to Indoor Air Quality (IAQ) improvement and reduction of energy consumption.