The PANASONIC ECO Inverter Air Conditioner (CS-YU series) is a range of energy-efficient air conditioners available in 1.0HP (CS-YU9AKH-1), 1.5HP (CS-YU12AKH-1), and 2.0HP (CS-YU18AKH-1) models. These models utilize inverter technology to provide consistent cooling while minimizing energy consumption. They are designed for residential use and aim to deliver a comfortable and cost-effective cooling solution.