Evaporative Cooling Effectiveness Calculator

Calculate effectiveness and performance of direct and indirect evaporative coolers.

Outdoor air dry-bulb temperature.
°F
Outdoor air wet-bulb temperature.
°F
Supply air dry-bulb temperature.
°F
Enter 1 for direct, 2 for indirect.
type

Results

Saturation Effectiveness-%
Cooling per 1000 CFM-BTU/hr
Water Use per 1000 CFM-gal/hr
References: ASHRAE Handbook - HVAC Systems and Equipment, Chapter 40 (Evaporative Cooling)