Samsung square cassette air conditioners (four-way) are available with energy-saving inverter technologies and capacities ranging from 24,000 to 48,000 BTU. They feature even air distribution and a compact design that fits suspended ceilings, with R410 freon. Available options and features of Samsung cassette air conditioners include: Square Cassette Design (4-Way): Perfect air distribution in 4 different directions to cover all corners of the room, while providing an elegant and hidden design within the ceiling. Inverter Technology: Efficient savings in electricity consumption with quiet and stable operation. Filter Types: Equipped with an antibacterial and dust filter, and some advanced models are available with an air purification filter.