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Page 29
2008-10-01
Table 9. Typical Absorption Distances, Single Distributor, 100 lbs/hr Humidifier
FPM °F °C % RH FT CM
Typical System
(V) (T) (H) (D)
500 70 21 30 3.0 91 Air handler before coils
500 55 13 80 4.5 137 Air handler after cooling
900 70 21 30 3.5 107 Supply air duct, on cool, no heat
900 55 13 70 6.0 183 Supply air duct, on cool
1000 55 13 90 8.0 244 Supply air duct, on cool with high humidity
1000 110 43 10 2.5 76 Supply air duct, on heating with low humidity
1000 70 21 45 4.0 123 Return air duct conditions
2000 55 13 45 10.0 305 Supply air duct higher pressure system
5000 140 60 10 2.0 61 After operating heating coil
(V) = Velocity at distributor location (T) = Temperature at distributor location
(D) = Absorption distance (visible steam) (H) = Humidity level after steam is absorbed
NOTE: This chart is for reference only; multiple distributors can reduce absorption distances.
Figure 3. Steam Distributor Location