Features: 1) Clean breath efficient biological antibacterial filter gauze 2) Made from green plant elite refined by using international leading technology 3) With the function of filtering and suppressing bacteria 4) Able to absorb and kill various pathogens and harmful gases efficiently for a long period 5) Prevent secondary pollution caused due to microorganism spreading, and ensure the health of your family 6) Double muting technology 7) Internal and external muting design avoids causing disturbance to others, and ensure quiet operation 8) Sheet part of the complete unit can absorbs noises, with optimized vibration- reducing design 9) The efficient resonant-type silencer can prevent noises to the greatest extent 10) Patented technology is diameter and unequal distance and motor bearing and fan bearing made by SHI in Japan and imported lubricant 11) So that you can feel the wind but hear no wind sound ,and muting of indoor and out door units is really realized 12) Toshiba, Hitachi and Matsushita compressors are applied