The Hitachi RAK-AJ series is a range of non-inverter air conditioners available in 1HP, 1.5HP, 2HP, and 2.5HP capacities. These air conditioners provide cooling using conventional technology, offering reliable performance for homes and small offices. The series provides cooling solutions for different room sizes, indicated by the various horsepower options. The model numbers RAK-AJ10PCASM, RAK-AJ13PCASM, RAK-AJ18PCASM and RAK-AJ24 refers to the different cooling capacities. They are designed to deliver consistent cooling power at a competitive price point.