This worksheet, adapted
from a printed version published by the Association of Home Appliance
Manufacturers for the continental United States, can help you estimate
how much cooling capacity you need.
a tape measure
a scratch paper
a pocket calculator
The worksheet guides you through the measurements needed to calculate
the size of the air conditioner, and then it automatically calculates
the final answer for you. We suggest that you print out the worksheet
first, fill it out, then enter the information online.
Make the measurements listed.
For each dimension or area, round it to the nearest whole number before
entering it in the appropriate box.
This worksheet is to be used only for the area to be cooled by a single
If the room is connected to another by a permanently open door or archway
more than 5 feet wide, consider the two rooms as one area and make all
the necessary measurements in both rooms.