Maintenance of these split systems is minimal. The filters are washable and require cleaning once or twice a year. These are accessible within the outdoor unit.
Split air conditioners are very quiet. In fact, these versions are so quiet, they are used in libraries, boardrooms and bedrooms. Even the outdoor component is quiet, so it can be installed near a patio without disturbing anyone.
There is no duct work that needs to be installed with split air conditioning systems. Only a small amount of wiring and copper tubing is needed to connect the two units. This minimizes wall cuts. Depending on where the indoor unit is located the outdoor unit can be on the ground or on a flat piece of roof or balcony.
The aesthetics of the split air conditioners are much nicer as they can easily blend in with your decor. This is a problem with bulky window conditioners. They also do not block the window so you can enjoy the view and let sunshine in.
Split air conditioners work very well when one or two rooms need to be cooled at certain times. These units deliver precise temperature control much more efficiently than other units. So you can cool your living room during the day and then bedroom during the night without having to cool down the entire house. This results in energy savings.
Besides cooling abilities many split air conditioners also function as heating units. This way you can be comfortable all year round without needing an additional home appliance.