It saves money and energy.
Alternate air conditioning systems.
Some homes especially older homes built before the advent of air conditioning lack the ability to support the ducts that make central air conditioning possible.
Cold compresses and fans can cool your body but it s also possible to cool an entire room without air conditioning.
Unlike a central air conditioning unit a portable air conditioner allows you to cool a specific room rather than waste energy and money cooling your entire home including all the unused rooms.
The simplest way to do this is to use a fan to pull in cold air through the windows at night.
Replacing a furnace or air conditioning system not doing it for you.
Others can support central air but can t be cooled as effectively with it as they might with an alternative system.
In dry climates you can use a swamp cooler which cools your home with evaporating water.
Solar and geothermal heating seem too pricey.
Whether installed in a window or made to sit on the floor these compact air conditioners need to be able to release exhaust outside either by being propped in the window or with an exhaust hose positioned in an opening in the window.
Although a ductless mini split is still an air conditioner one can still include it as an alternative to traditional ducted air conditioners for 2 reasons.
According to energy gov ducts losses can account for more than 30 of energy consumption for space conditioning.
In fact there are a lot of alternatives.