RT-PRC031-EN 37

Table 6 Enthalpy of Saturated Air

Wet Bulb
Temperature Btu per Pound
41 15.70
43 16.66
42 16.17
43 16.66
44 17.15
45 17.65
46 18.16
47 18.68
48 19.21
49 19.75
50 20.30
51 20.86
52 21.44
53 22.02
54 22.62
55 23.22
56 23.84
57 24.48
58 25.12
59 25.78
60 26.46
61 27.15
62 27.85
63 28.57
64 29.31
65 30.06
66 30.83
67 31.62
68 32.42
69 33.25 Figure 18. Air Density Ratios
70 34.09
71 34.95
72 35.83
73 36.74
74 37.66

Table 7 Cooling Capacity Altitude Correction Factors

Altitude (Ft.)
Sea Level 1000 2000 3000 4000 5000 6000 7000
Cooling Capacity Multiplier 1.00 0.99 0.99 0.98 0.97 0.96 0.95 0.94
Sensible Heat Ratio Correction Multiplier 1.00 .98 .95 .93 .91 .89 .87 .85

Table 8 Gas Heating Capacity Altitude Correction Factors

Sea Level To 2000 2001 to
2500 2501 to
3500 3501 to
4500 4501 to
5500 5501 to
6500 6501 to
7500
Capacity Multiplier 1.00 .92 .88 .84 .80 .76 .72
Performance Adjustment Factors

Altitude/TemperatureCorrection

AirDensity

Ratio (Density

at New

Air Density)

Condition/Std.

Air Handler Leavin

g

AirTem

p

erature (de

g

rees F)