ASHRAE PSYCHROMETRIC CHART NO.

1
110 120
NORMAL TEMPERATURE
30
R
BAROMETRIC PRESSURE: 101.325 kPa R
OA
Copyright 1992
10 0
AMERICAN SOCIETY OF HEATING, REFRIGERATING AND AIR-CONDITIONING ENGINEERS, INC.
28

SEA LEVEL 30

0 .9
 1.0 1.0 -

4
12 0
10.0 0.8 1.5 26
0.7 2.0 -5.0 90
0.6 SENSIBLE HEAT Qs 4.0 -2.0 30
TOTAL HEAT Qt - WE
TB
0 .5 -4. UL
5.0 0 B TE 24
-2. 0.0
0.4 0 MP
-1 E RA
.0 TU
80 RE
0.3

4.0
1.0 - °C

-0 .
11 0

5
0.2

-0.2
22
0.1

0 .9
2
3.0

2.0
70 25
2.5

20
ENTHALPY h
HUMIDITY RATIO W
10 0
25 18
60
R
AI

0 .9
RY

0
C
D

-° 16
F
O

E
R
AM

U
AT
R

50
G

20 90
R
LO

PE
KI

M
TE
R

14
PE

N
IO

HUMIDITY RATIO - GRAMS MOISTURE PER KILOGRAM DRY AIR

J
-K

AT

20
R
PY

TU

0 .8
AL

40
SA
TH

8
EN

12

% 80
15 90

% 10
30
80
0 .8
15 6V
%
70 ON COIL AHU
OL

OFF COIL AHU MIX 8

UM

10
SA
E

%
20 60 70
-C
UB
0 .8

10
IC

%
4

50 6

DRY BULB TEMPERATURE - °C

ME

5
T ER

40%
PE
0 .8

10 5
R

4
2

KG

30%
60
DR
0 .8

YA

20%
0

IR

2
0.7

TY
VE HUMIDI
10% RELATI
8

10

15

20

25

30

35

40

45

50
5

10 20 30 40 50
ENTHALPY - KJ PER KILOGRAM OF DRY AIR