Even though basements tend to be cooler than the upper levels of a house, they also tend toward dampness and dead air because of a lack of windows and ventilation. One solution is to install a basement air conditioner. You can choose the best basement air conditioner by comparing different models of what are called ductless mini-split air conditioners and reading reviews of the different brands. The best choice will be the one receives high marks for performance, is the right size that you need, matches your personal preferences for look and style and fits within your budget for a basement air conditioner.

One factor that can affect your choice is whether your basement has windows and the size of those windows. A window air conditioner can be installed if there is a window large enough to accommodate it. In a windowless basement, a window unit is not an option.

The best choice for most basements is what is called a ductless mini-split air conditioner. Manufactured by several major appliance companies, these units provide advanced energy efficiency, require limited installation and are much quieter than conventional window units. These units do not require ductwork or special wiring, so they are ideal for basements. An added bonus is that these systems are 30 percent more energy-efficient than conventional units.

A mini-split system is made up two components: a slim-line indoor air handler that is wall-mounted or sits freely and a slim outdoor condenser. Coolant from the outdoor condenser is delivered to the indoor handler through small refrigerant lines running through openings in the wall or ceiling that require minimal cutting and drilling. Special models also have filters that provide for added humidity control. Some models might include a dehumidifier or an air filtration system.

Ductless mini-splits, compared to other systems, offer more flexibility than conventional units and are more aesthetically satisfying than old-style window units. They are also expandable, in case a single basement air conditioner does not provide sufficient cooling for your basement, and as many as four indoor handlers can be attached to one outside unit. The only cutting or drilling required is a small hole for both connections to the outside unit and water drainage.