– 17 –
8' 10 ' 1 4' 18 ' 22' 26' 30' 34' 38'
10 ' 80 100 140 180 220 260 300 340 380
12 ' 96 120 168 216 264 312 360 408 456
14 ' 112 140 196 252 308 364 420 476 532
16 ' 128 160 224 288 352 416 480 544 608
18 ' 144 180 252 324 396 468 540 612 684
20' 160 200 280 360 440 520 600 680 760
22' 176 220 308 396 484 572 660 748 836
24' 192 240 336 432 528 624 720 816 912
26' 208 260 364 468 572 676 780 884 988
28' 224 280 392 504 616 728 840 952 1064
30' 240 300 420 540 660 780 900 1020 1140
32' 256 320 448 576 704 832 960 1088 1216
34' 272 340 476 612 748 884 1020 1156 1292
36' 288 360 504 648 792 936 1080 1224 1368
38' 304 380 532 684 836 988 1140 1292 1444
40' 320 400 560 720 880 1040 1200 1360 1520
42' 336 420 588 756 924 1092 1260 1428 1596
44' 352 440 616 792 968 1144 1320 1496 1672
46' 368 460 644 828 1012 1196 1380 1564 1748
48' 384 480 672 864 1056 1248 1440 1632 1824
50' 400 500 700 900 1100 1300 1500 1700 1900
Floor Area Table
1900
1800
1700
1600
1500
1400
1300
1200
1100
1000
900
800
700
600
500
400
300
200
100
0
190
0
1800
1700
1600
1500
1400
1300
1200
1100
1000
900
800
700
600
500
400
300
200
100
0
Area To Be Cooled - Square Feet
A
B
C
Occupied Space Above
Ceiling
Insulated Ceiling Under Attic
Non-Insulated Ceiling Under Att
ic
5000
6000
4000
5000
6000
8500
8500
11000
11000
15000
15000
19000
19000
24000
Daytime Cooling
Capacity Required -
BTU/HR
• If the area to be cooled includes
a kitchen, ADD 4000 BTU/hr.
• If more than two people occupy
the area ADD 600 BTU/hr. per
person.
• If only one person occupies the
area, SUBTRACT 600 BTU/hr.
Cooling Capacity
Using the charts on this page, follow the
guidelines listed below:
1. Use the Floor Area Table to determine the
square footage of the area being cooled. If
the desired area to be cooled consists of two
adjacent areas, such as living room or hall,
determine each space separately and then
add the two totals.
2. Locate the square footage on the left side
of the Area To Be Cooled - Square Feet chart.
Using this number as a reference point, draw
a horizontal line across the chart. Select the
correct room air conditioner capacity from
one of the three diagonal bands in the chart.
Note: The bands help compensate for variations
in cooling applications. The bands indicate a
range of BTU/hr capacities normally required
to cool such an area. Also, note the possible
adders/subtractors, at the bottom of Area To Be
Cooled chart.