A window air conditioner can generally serve three different purposes.
Firstly, and most often, it can act as the sole source of air conditioning in a room or property.
Secondly, it can be used to boost air conditioning in a property which already has a central air conditioning system, but perhaps not great coverage.
Thirdly, it can act as a backup for a property where the central air conditioning system is unreliable.
Typical things that you might want to take into account when comparing and choosing an air conditioner are factors such as the capacity (measured in BTU), the temperature range, whether there is a remote, versatility of the settings such as the fan speeds, and extra features.
I hope that you enjoy reading my top 5 list for the best window air conditioners 2015 and find it useful.