LG maximized the efficiency and economics of duct-free technology used in mini split heat pump systems. Now you can bring more attractive, cost effective solutions to your commercial and residential applications, providing one zone of both air conditioning and heating needs. This complete system creates the perfect climate control for your space and makes any application fresh and comfortable. LG Inverter Technology. LG LC426HV Ceiling Cassette Mini Split Heat Pump System uses an inverter, which uses a variable speed compressor that is quieter to operate and uses less energy than conventional air conditioners. When the selected temperature is reached, the inverter compressor operates at low speed to maintain that comfort level