The Panasonic CS-PN series is a range of standard, non-inverter air conditioners available in various cooling capacities (1.0HP, 1.5HP, 2.0HP, and 2.5HP). These models (CS-PN9WKH, CS-PN12WKH, CS-PN18WKH, and CS-PN24WKH) utilize R32 refrigerant, which is more environmentally friendly than older refrigerants. They are designed to provide basic cooling functionality for residential or small commercial spaces. Being non-inverter models, they operate at a fixed speed, offering a cost-effective cooling solution.