To ensure that your split air conditioner is working well, you must keep its air filter clean. Air filter accumulates a lot of dust and airborne particles over the time. This factor then intrudes with the quality of air that you receive in your interiors. Thus, make it a point to clean the air filters regularly so that the air you breathe is not only cool but healthy as well. Many experts suggest cleaning the air filter once or twice a month if you use the air conditioner regularly.