Honeywell Design and Application User Manual

Section 2 - Enthalpy Theory And Controllers
25 Honeywell Economizers 63-8594-02
Relative Humidity and Saturation
Relative Humidity
Relative Humidity is the ratio of the measured
amount of moisture in the air to the maximum
amount of moisture the air can hold at the
same temperature and pressure. Relative
humidity is expressed in percent of saturation.
Air with a relative humidity of 35%, for
example, is holding 35 percent of the moisture
that it is capable of holding at that temperature
and pressure.
Saturation
The point at which the relative humidity
reaches 100% and no more moisture can be
contained in the air is the saturation point. The
relative humidity and saturation lines are the
only curved lines on this psychrometric chart.
40 F
4 C
50 F
10 C
60 F
16 C
70 F
21 C
80 F
27 C
90 F
32 C
100 F
38 C
110 F
43 C
120 F
49 C
35 F
2 C
45 F
7 C
55 F
13 C
65 F
18 C
75 F
24 C
85 F
29 C
95 F
35 C
105 F
41 C
115 F
46 C
F 0 9
) C 2 3 (
B L U B T E W
F 5 8
) C 9 2 (
B L U B T E W
F 0 8
) C 7 2 (
B L U B T E W
F 5 7
) C 4 2 (
B L U B T E W
F 0 6
) C 6 1 (
B L U B T E W
F 5 5
) C 3 1 (
B L U B T E W
F 0 5
) C 0 1 (
B L U B T E W
5 4
F
(
7
) C
B L U B T E W
0 4
F
(
4
) C
B L U B T E W
5 3
F
(
2
) C
B L U B T E W
H R % 0 8
H R % 0 7
H R % 0 3
H R % 0 4
H R % 0 5
H R % 0 6
H R % 0 9
H R % 0 1
H R % 0 2
H R % 0 0 1 - N O I T A R U T A S
F 0 7
) C 1 2 (
B L U B T E W
F 5 6
) C 8 1 (
B L U B T E W
DRY BULB TEMPERATURES
M25279

Honeywell Design and Application Specifications

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Brand	Honeywell
Model	Design and Application
Category	Controller
Language	English