GapS 4.0 is the 4th generation of the GapS system, featuring a patent pending, eco-friendly and self-cleaning design. It will be integrated into HVAC/Air Handling Units in buildings to provide cleaner and colder air, resulting in about 50% reduction in energy consumption and a yearly reduction of 289 tonnes of CO₂ emissions. GapS 4.0 is mainly designed for roof-based installations and powered by photovoltaic solar panels, fully offsetting its operational energy needs.