COOLING LOAD GUIDE-SQUARE FEET METHOD
ROOM AIR CONDITIONERS
To make sure you choose the right size umt. use this COOLING LOAD GUIDE -
SQUARE FEET
METHOD It IS a quick. easy means of computing capacity
For
WIWIXS
In e~praure
shading lnsulallon and bulldlng construction AHAM Cooling Load Esllmate Form FtAC~l must be used
2000
I800
1600
I400
1200
1000
800
600
400
200
x 8 E 8
z z
is 8 8 8 s
c
a =
E
s
z g
; z R F,
z
RI
INSTRUCTIONS:
1. Determine lhe area to be cooled I” square feet and locate lhal
polnl on lhe left side of chart
2. Move horizontally across lo the center line of Band A, B or C
according to the condmon of the celling In the area lo be cooled
Band A-Occupied Space Above Celling
0end B-Insulated Celling Under Attic
Bmnd C-Non-Insulated Celling Under AttIc
3. From center of band move wthm the band to lett lor more
northerly exposure or rlght for more westerly exposure
4. From thls point. read down to bottom of chart to determine
required Bluihr output Write the Btuihr figure In the space
lndlcated below
5.- Btuihr (from number 4 above)
6.
Locale your qeographlc area on lnsel map and multiply
factor showhbytlgure In number 5
7. ~~
If room air condltloner IS Intended orlmarllv for moht-
time cooling. subtracl 30% (from hg;re In nimber 67
6,--
Subtract 30 Bluihr from figure in number 7 (or 6) for
each Itnear foot of wall separating the area lo be cooled
from anolher cooled room
9.--- If more lhan two people occupy area, add 600 Btuihr per
oerson (to Oaure In number 61 11 onlv one oerson
subtract’600 tituihr
, 1
10.. ~ Add 4000 Btuihr (lo figure In number 9) II area lo be
COOLING CAPACITY REQUIRED-BTU/HR
A-1
Room Air Conditioner
cooled Includes kitchen
For best resulls, a room condltlonmg unll or units with a cooling
capaclly rallng close to that estlmaled above should be selected
A smaller capacity umt operatmg continuously ~111 contrlbute
more to comfort than a larger capacity unit operating Intermit-
tently
14
