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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
ENTHALPY
-
BTU
PER
POUND
OF
DRY
AIR
10
15
20
25
30
35
40
45
50
E
N
T
H
A
L
P
Y
-
B
T
U
P
E
R
P
O
U
N
D
O
F
D
R
Y
A
I
R
S
A
T
U
R
A
T
I
O
N
T
E
M
P
E
R
A
T
U
R
E
-
°
F
20
25
25
30
30
35
35
40
40
45
45 50
50 55
55 60
60
65
65
70
70
75
75
80
80
85 WET BULB TEMPERATURE - °F
85
90
10% RELATIVE HUMIDITY
20%
30%
40%
50%
60%
70%
8
0
%
9
0
%
1
2
.
5
1
3
.
0
1
3
.
5
1
4
.
0
S
P
E
C
I
F
I
C
V
O
L
U
M
E
f
t
³
/
lb
O
F
D
R
Y
A
I
R
1
4
.
5
1
5
.
0
HUMIDITY
RATIO
-
GRAINS
OF
MOISTURE
PER
POUND
OF
DRY
AIR
PSYCHROMETRIC CHART
BAROMETRIC 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
VAPOR
PRESSURE
-
INCHES
OF
MERCURY
-20
0
10
20
25
30
35
40
45
50
55
60
65
70
75
80
85
DEW
POINT
-
°F

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Psychrometric chart 29in_hg

  • 1. 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 ENTHALPY - BTU PER POUND OF DRY AIR 10 15 20 25 30 35 40 45 50 E N T H A L P Y - B T U P E R P O U N D O F D R Y A I R S A T U R A T I O N T E M P E R A T U R E - ° F 20 25 25 30 30 35 35 40 40 45 45 50 50 55 55 60 60 65 65 70 70 75 75 80 80 85 WET BULB TEMPERATURE - °F 85 90 10% RELATIVE HUMIDITY 20% 30% 40% 50% 60% 70% 8 0 % 9 0 % 1 2 . 5 1 3 . 0 1 3 . 5 1 4 . 0 S P E C I F I C V O L U M E f t ³ / lb O F D R Y A I R 1 4 . 5 1 5 . 0 HUMIDITY RATIO - GRAINS OF MOISTURE PER POUND OF DRY AIR PSYCHROMETRIC CHART BAROMETRIC 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 VAPOR PRESSURE - INCHES OF MERCURY -20 0 10 20 25 30 35 40 45 50 55 60 65 70 75 80 85 DEW POINT - °F