Looking to get a windowed air conditioner to keep your house or apartment cool? There are a few things to consider when looking to get a window AC unit. You need to select one that is appropriately sized for the room you’re cooling. Window units are not designed to cool an entire house; rather they are only for cooling one room.
For a room up to 350 square feet, you need a unit with 5,000 to 8,000 BTUs of cooling. A room up to 550 sq ft needs up to 12,000 BTUs, up to 1050 sq ft needs up to 18,500 BTUs, and up to 1600 sq ft needs up to 25,000 BTUs. In addition, you need to take into account the normal conditions of the room being cooled. Is that part of the house shaded or is it generally much hotter? Do you have the capacity to install a large unit in the room in question?
You also want to look for a unit that is efficient. On the specifications for the AC unit, there should be a listing for EER, or Energy Efficiency Ratio. The higher this number is, the more efficient the air conditioner is. This means that you will cool more air for less electricity.
When installing the AC, make sure you have someone to help you. Window units are very heavy and can be unwieldy to hold and maneuver. If possible, install the unit on a north facing window; this side is most shaded during the course of the day and it will allow your AC to work more efficiently.