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9
Psychrometric chart
.025
.024
.023
.022
.021
.020
.019
.018
.017
.016
.015
.014
.013
.012
.95
.90
.85
.80
.75
.70
.65
.60
.55
.50
.45
.40
.35
.011
.010
.009
.008
.007
.006
.005
.004
.003
.002
.001
0
Sensible
heat
factor
Pounds of moisture
per pound of dry air
7
8
9
10
11
12
32
33
34
35
36
37
38
39
40
41
42
43
44
45
47
48
49
46
27
28
29
30
31
19
20
21
22
23
24
25
26
12
13
14
15
16
17
18
Wet Bulb,
Dewpoint or
Saturation
Temperature F
Dry Bulb
Temperature F
20
Below 32˚F, properties and enthalpy deviation lines are for ice.
25
25
30
35
40
45
50
55
60
65
70
75
80
30 35 40
85
90
95
100
105
180
170
160
150
140
130
120
110
100
90
80
70
60
50
40
30
20
10
0
45
50
55
60
65
70
75
80
85
90
95
100
105
110
Enthalpy at saturation, Btu per pound of dry air
Grains of moisture
per pound of dry air
14.0 cu ft
14.5 cu ft per pound of dry air
13.5 cu ft
13.0 cu ft
12.5 cu ft
90% Relative Humidity
80%
70%
60%
50%
40%
30%
20%
10%
-.02 BTU
-.01 BTU
-.02 Btu
-.04 Btu
-.06 Btu
-.08 Btu
+0.1 Btu
+0.2 Btu
+0.3 Btu
+0.4 Btu
+0.5 Btu
80%
60%
40%
20%
Btu per
pound of dry air -0.3 Btu
Enthalpy deviation
HRV