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COOLING LOAD GUIDE-SQUARE FEET METHOD
ROOM AIR CONDITIONERS
To make sure you choose the right size unit, use IhIs “COOLING LOAD GUIDE -
SQUARE FEET
METHOD It IS a quick, easy means of computing capacity
For exiremes III exposure. shadtng. lnsulallon and bwldtng consln~ct~on AHAM Cooling Load Esllmale Form RAC~I
must
be
used
, ,
,
/
I’ A,.
COOLING CAPACITY REQUIRED--BTU/HR
INSTRUCTIONS:
1. Determine the area to be cooled in sauare feel and locate thal
point on the left side of chart
2. Move honzonlally across lo the center line of Band A B or C
according to the condillon of the ceiling in the area to be cooled
Band A-Occupied Space Above Celling
Band B-lnsulaled Celling Under Alhc
Bmnd C-Non-Insulated Celling Unaer Attic
3. From center of band move wthln the band to left for more
northerly exposure or rlght for more westerly exposure
4. From lhls point, read down lo bottom of chart to determlne
required Btulhr output Wrlle Ihe Bluihr figure I” the space
Indicated below
5.- Btuihr (from number 4 above)
6. Locale your geographic area on unset map and multiply
factor shown by flqure in number 5
7.
6.
If room air condltloner IS lnlended prlmarlly for night-
time cool~no sublracl 30% (from flaure I” number 6)
Subtract 36 Btu/hr from figure In-number 7 (or 6) for
each linear fool of wall separallng the area lo be cooled
from another cooled room
9.--~ If more than two people occupy area. add 600 Btufhr per
person (to figure I” number 8). If orlly one person.
subtract 600 Btuihr
10. ~ Add 4000 Bluihr (lo figure in number 9) 11 area to be
cooled Includes kitchen
For best results, a room condltlonlng unit or units with a cooling
capacity rating close to that estimated above should be selected
A smaller capacity un11 operahng continuously ~111 contnbule
more to comfort than a larger capacity unit operating Intermit-
lently
AHAiL
Room Air Conditioner
MAP FACTORS
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