Mohamed Haarish 4 My kid who is 4 years old always suffered from bronchitis for the past 1 year continuously. He was in medication for a very long time. I could not figure out whats was wrong with his health. We thought as he is going to school his immunity was not perfect as told by the doctor in Japan. Then I realized my house is filled with micro dust particles and high humidity. Finally, I made up my mind to buy this beautiful machine.It did magic from the very first day. My kid no longer has a stuffy nose and coughing in the night. My sleepless nights are now past.Thank you!Regards,Haarish