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COOLING
LOAD GUIDE-SQUARE
FEET METHOD
ROOM AIR CONDITIONERS
To make
sure
you
choose
the
right
size
unit,
use thts
"COOLING
LOAD
GUIDE
-
SQUARE
FEET
METHOD."
It is a qurck,
easy means
of computing
capacity.
for eItremR
III exposure. shadmg. rnsulat~on and bulldmg conslruchon.
AHAM Coolrng Load Eslrmale Form RAG1 musl be used
COOLING CAPACITY REQUIRED--BTU/HR
INSTRUCTIONS:
1.
Determine
Ihe area to be cooled
In square feel and locate that
pomt on the lefl side of chart
2. Move horizonlally
across
to the center
line 01 Band A, E or C
according
lo the condition
of the ceiling
in Ihe area to be cooled.
&ml
A-Occupied
Space Above Ceiling
band B-Insulated
Ceiling
Under Attic
Band C-Non-Insulated
Ceiling
Under Attic
3. From center
of band move within
the band to leh for more
northerly
exposure
or right for more westerly
exposure.
4. From this point,
read down
to bottom
of charl
to determlne
required
Btulhr
oulpul.
Write
the Btulhr
figure
in the space
indicated
below.
5.-
Btu/hr (from number
4 above).
6.-
Locate
your geographic
area on Inset map and mulhply
faclor shown
by hqure m number
5.
7..---If
room
air conditioner
IS Intended
prrmarlly
for nlghl-
time coohna.
subtract
30% lfrom
fiaure In number
6)
6.__-
Subtract
3d Btuihr
from
figure
ln<number
7 (or 6) for
each hear
foot of wall separatmg
the area lo be cooled
from another
cooled
room
6.__
If more lhan Iwo people occupy area, add 600 t3tuihr per
person
(to II
i
ure VI number
8); if only
one person.
subtracl
600
tu/hr.
lo.-
Add 4000 Btulhr
(to figure
m number
9) If area lo be
cooled
Includes
kitchen.
For best results. a room conditionmg
unll or units wllh a cooling
capacity
rafmg close ?o that estimated
above should
be selected.
A smaller
capacity
unit operating
continuously
~111 contrrbute
more
to comfort
than a larger
capacity
unit operatmg
Intermit-
tently.
14
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