The Panasonic KU-Series X-Deluxe Inverter air conditioner utilizes R32 refrigerant and comes in various horsepower options (1.0HP, 1.5HP, 2.0HP, 2.5HP, and 3.0HP) to suit different room sizes. Being an inverter model, it offers energy-efficient cooling by adjusting compressor speed based on the room's cooling needs. The use of R32 refrigerant makes it more environmentally friendly compared to older refrigerants. The 'X-Deluxe' likely indicates premium features and performance within the KU-Series, providing efficient and comfortable cooling.