Evaporator

Coil Temperature Difference (TD)
Important: to determine space humidity level


Coil TD     Air entering Evap. Minus Ref. Sat. Temp.


Normal Coil TD’s             Relative Humidity

8 – 10 F                             90% +

10 - 12                               85 to 90%

12 to 14                             80 to 85 %

14 to 18                             70 to 80%






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