Aircosaver is an electronic control unit that intelligently manages air conditioning systems to improve their energy efficiency. It achieves energy savings of 20-30% resulting in a payback period of about 8 months for units used 6-8 hours per day. As a retrofit product, it upgrades existing air conditioning units. When activated, Aircosaver uses sensor-driven algorithms to detect when the evaporator coil is fully charged and turns the compressor off to avoid inefficient operation, switching it back on once stored energy is used. This optimization can reduce energy consumption by up to 30% according to tests. Aircosaver is developed and manufactured in Germany to high quality standards.