20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120
DRY BULB TEMPERATURE - °F
10
20
30
40
50
60
70
80
90
100
110
120
130
140
150
160
170
180
190
200
210
10 15 20 25 30
35
40
45
50
55
55
60
60
65
EN
TH
AL
PY
- B
TU
PE
R P
OU
ND
OF
DR
Y A
IR
10
15
20
25
30
35
40
45
50
EN
TH
ALP
Y - B
TU
PER
PO
UN
D O
F D
RY A
IR
SATU
RATIO
N T
EM
PER
ATU
RE - °
F
20
25
2530
3035
3540
4045
45 50
50 55
55 60
6065
65
70
70
75
75
80
80
85 WET BULB TEMPERATURE - °F
85
90
10% RELAT IVE HUM ID ITY
2 0 %
3 0 %
4 0 %
5 0 %
6 0 %
7 0 %
80%
90%
12.5
13.0
13.5
14.0
SP
EC
IFIC
VO
LU
ME
ft³/lb O
F D
RY
AIR
14.5
15.0
HU
MID
ITY
RA
TIO
- G
RA
INS
OF
MO
IST
UR
E P
ER
PO
UN
D O
F D
RY
AIR
PSYCHROMETRIC CHARTBAROMETRIC PRESSURE 29.921 inches of Mercury
Linric Company Psychrometric Chart, www.linric.com
.1
.2
.3
.4
.5
.6
.7
.8
.9
1
1.1
1.2
1.3
VA
PO
R P
RE
SS
UR
E -
IN
CH
ES
OF
ME
RC
UR
Y
-20
0
10
20
25
30
35
40
45
50
55
60
65
70
75
80
85
DE
W P
OIN
T -
°F