"The advantages of ductless air conditioners are the following: It is less complicated and easy-to-intsall system. The components creating noise are situated outside the home thus freeing the home from unwanted noise. The effectiveness of ductless systems are same as central air conditioners are same but the expenses are lower. Only a small hole is required to connect the outdoor and the indoor unit and not a bulky exhaust hose. The disadvantages of ductless air conditioners are: A more advanced installation is required compared to the window or the portable units. The installation requires the intervention of an expert HVAC technician. The units are costlier than the window or the portable units. Ductless air conditioners require permanent installation and cannot be removed on requirement."