Evaporative Cooler Formulas

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Evaporative Cooler Formulas

Evaporative Cooler Effectiveness:

E = T_edb – T_ldb
T_edb – T_ewb x 100

Where:

T_edb = Dry Bulb Temperature Entering Media, °F

T_ldb = Dry Bulb Temperature Leaving Media, °F

T_ewb = Wet Bulb Temperature Entering Media, °F

Water Evaporation Rate Estimate:

Gallons per minute = V x (T_edb – T_ldb)
500,000

Where:

V = Air Volume in cubic feet per minute, cfm

T_edb = Dry Bulb Temperature Entering Media, °F

T_ldb = Dry Bulb Temperature Leaving Media, °F

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