Before installing an air conditioning system, ensure the correct calculations are used. Before installing an air conditioning system, the correct tonnage must be calculated to ensure proper ventilation and cooling for the area.

Take measurements of the area to be cooled. Multiply the length, width and height of the area in foot measurements to arrive at the total area.

Divide the total area by 1000. The resulting number is your ton capacity.

Multiply your final tonnage by 3517 watts to find the wattage for your air conditioner.