Hisense Non-Inverter 18,000 Btu Duct Air Conditioner AUD-18HX4SSNL 1Key features of Hisense Non Inverter 18,000 BTU Duct Air Conditioner (Model: AUD 18HX4SSNL 1) : Cooling Capacity 18,000 BTU (1. 52 HP equivalent): Suitable for medium to large rooms, typically around 3040 square meters, depending on insulation and climate. Type Non Inverter Duct AC: Uses a fixed speed compressor, meaning it operates at full capacity when cooling. Pros: Simple, reliable, lower upfront cost. Cons: Less energy efficient than inverter