1. From 3RT to 1500RT, complete models are suitable for all different requirements. 2. Having F.R.P and heating zincification iron as mayor structure materials, they are characterized by lightness, stability and anticorrosion. 3. It is easy to install and suitable for all spots. 4. Round-shape design and air resistance to keep out strong wind, which is most suitable for frequent typhoon areas. 5. Larger fan and mouth to reduce speed of fan to lower noise. 6. Water tray is equipped with Japan anechoic carpet to remove noise of water drops. 7. Wind mouth of above KLN-150 is equipped with wind releaser to reduce noise in upright directions. 8. Above KLN-60 is equipped with strap decelerating machine to avoid noise of gear decelerating machine.