Size Matters. Especially when choosing the correct BTU size for an air conditioner. Choose too small a unit, you could end up with a room that's not cool enough, or with an air conditioning unit that overheats. On the other hand, too large a unit for the space, will not remove the necessary moisture from the room, making it feel clammy and uncomfortable.
The chart below is a great starting point. These BTU calculations are based on a standard room with 8 foot ceilings, 2 windows and one door. If the room has more windows, doors or higher ceilings, adjust the BTU's upward. Other factors in determining the BTU size would be the rooms usage. Kitchens, normally have more heat, and rooms with heat emitting devices, like computers and other electronics give off extra heat and would require a larger unit.
Have a more complicated room? Use our BTU calculator to get a more accurate result.
After looking at the chart, if you are still unsure of the correct BTU size for your home, call our customer service department at 877-847-0050, and one of our representatives will help you.