within the 48 Contiguous United States
This chart may help you determine what size portable air conditioner shop for. A word of caution: don’t buy an air conditioner that’s too large. An oversized air conditioner is actually less effective – and can waste valuable energy at the same time. Because portable air conditioners remove both heat and humidity from the air, an oversized unit will cool the room quickly, but only remove some of the humidity. This will leave your room with a damp, clammy feeling. A properly sized unit will effectively remove humidity as it cools.
1. Determine the square footage of the area to be cooled using the following formulas:
2. Using the square footage and the chart below, determine the correct cooling capacity. Cooling capacity is measured in British thermal units (BTUs) per hour.
|Area To Be Cooled (square feet)||Capacity Needed (BTU’s per Hour)|
|100 to 150||5,000|
|150 to 250||6,000|
|250 to 300||7,000|
|300 to 350||8,000|
|350 to 400||9,000|
|400 to 450||10,000|
|450 to 550||12,000|
|500 to 700||14,000|
|700 to 1,000||18,000|
3. Make any adjustments for the following circumstances: