An Inverter is used to control and vary the speed of the compressor motor, similar to a car. It simply slows down and speeds up as needed to hold a selected comfort setting.
Inverter technology provides a more precise room temperature by continuously regulating the temperature, without the temperature fluctuations of fixed speed air conditioning systems. The increased efficiency in contraction to traditional air conditioners makes the inverter systems quieter, with lower operating cost. Moreover, by regulating the temperature continuously and eliminating the sharp fluctuations in the load, it extends the life of parts making the inverter system more durable and reliable. Inverter systems are approximately 30% more efficient than fixed speed units and can reach the desired room temperature quicker. The speed control of the outdoor unit also means quieter operation, and this is important especially at night in residential areas. Whilst the inverter systems may be more expensive than the constant speed air conditioners, this is balanced by lower energy bills overall. The payback time is approximately two years depending on the usage.