LELANTUS is a start-up company based in Cyprus, that was founded in 2020 by a team with strong scientific and technological background. LELANTUS goal is to bring to the market cutting-edge research outputs including innovative solutions for estimation, monitoring and control of the Indoor Environment Quality in Intelligent Buildings. Indoor Environment Quality significantly affects our lives since we spend most of our time indoors. In LELANTUS we are in the forefront of research and innovation regarding solutions for ensuring a healthy, safe, and productive Indoor Working Environment. LELANTUS aim at empowering businesses to both improve the quality of occupants lives and at the same time lower their costs.