As the outer unit is continuously in contact with the environment & the weather changing he aluminum fins get deteriorated with time. Also, the water sprayed on the fins add to the ageing of the airconditioners Since refrigerant does not Liquefy fast enough, the compressor keeps on running. It cuts off very late Which in turn consumes unnecessary electricity & gives higher electric bills 【Ideal for Energy Conservation Enhancement of Type 2 Specified Plant with the Revised New Energy Conservation Law】 Countermeasure against global warming (CO 2 reduction) · Add supercomputer to improve efficiency and love to the earth