Caeli Energie is a DeepTech startup designing and manufacturing new generation residential air conditioners: high energy efficiency and low carbon footprint. We offer a performing, sustainable and local alternative to conventional air conditioners mostly manufactured in Asia. We address professionals in the building industry (builders, operators, installers). Our solution is different from conventional air conditioners because: 1. Electricity consumption divided by 3 (compared to a conventional air conditioner); 2. Does not require an external unit; 3. Works without polluting refrigerant; 4. Does not accentuate the heat island phenomenon.