This series of Hisense air conditioners utilizes R32 refrigerant and offers both inverter and non-inverter models ranging from 1HP to 2.5HP. The models included are AI10KAGS, AI13KAGS, AI20KAGS, AI25KAGS, AN10DG, AN13DBG, AI10TUGS, and AI13TUGS. The inverter models offer energy-efficient cooling and heating with precise temperature control, while the non-inverter models provide a more cost-effective cooling solution. R32 refrigerant is known for its lower environmental impact compared to older refrigerants.