Recent developments in technology and increased choices for consumers have lead to the window AC unit becoming a must-have purchase for apartment dwellers and those without central air conditioning systems in their homes.

Several decades ago, air conditioning was a luxury enjoyed only by the very wealthy.  That, however, has changed considerably. With prices beginning at just $100, window air conditioners are more accessible than ever.

Though many players have entered the air conditioning market, Fedders, GE, Kenmore, LG, Maytag and Whirlpool are all popular brands in the marketplace.

General window unit air conditioners have cooling capacities that range from 5,000BTU/hr all the way up to 30,000BTUS/hr. A typical small or mid-sized air conditioner will have a BTU ranging from 5,000 to 9,000.

All window AC units contain a compressor, condenser, two fans, and an evaporator. Most standard units are intended to be used in double hung windows, but some specialty models are designed for use with casement or slider windows.

Some of the newer units have great features, such as electronic touchpad controls, energy saver settings, and digital temperature readouts. A timer is another great thing to have on an air conditioning unit as it allows you to set the AC to cycle on and off at certain times of the day (i.e. the air conditioner might stay off all day and turn on an hour before you are scheduled to come home from work).

In addition to the technological advances, air conditioners now have some great upgraded safety features. Most AC units now come with larger plugs that are able to shut down power when the unit detects damage in the electrical cord. This new "smart plug" (sometimes called an LCDI, leakage current detection interrupter) goes a long way in preventing fires.

Affordability, ease of use, and updated technology make window air conditioning units a great choice for many people today.