AltitudeFeet In. Hg

Pressure

-1000-500

500100020003000400050006000700080009000

10000

31.0230.4729.9229.3828.8627.8226.8225.8424.9023.9823.0922.2221.3920.58

29.92

29.92

29.92

3

20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105

10

20

30

40

50

60

70

80

90

100

110

120

130

140

150

160

170

180

10

15

20

25

30

35

40

45

10%

20%

30%

40%

60%

70%

80%

90%

20

25

2530

3035

35

40

40

45

45

50

5055

5560

6065

65 70

7075

75

80

85

12.5

13.0

14.0

PSYCHROMETRIC CHART

PSYCHROMETRIC CONVERSION FACTORS

BAROMETRIC PRESSURE

TEMPERATURE HUMIDITY RATIO

3

3

3

AIRFLOW

PSYCHROMETRIC CORRECTIONS FOR ALTITUDE

Complete humidity control