Cooling Tower Performance Calculator

Cooling Tower
Cooling Tower Performance Calculator

Calculate tower approach, range, and efficiency from condenser-water and wet-bulb temperatures.

Tower temperatures

Use readings from the same stable operating condition.

°F
°F
°F
Calculate Tower Performance Reset
Tower approach
— °F
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Tower range
—
Tower efficiency
—
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Formulas

Tower approach = leaving condenser-water temperature − ambient wet-bulb temperature.

Tower range = entering condenser-water temperature − leaving condenser-water temperature.

Tower efficiency = range ÷ (range + approach) × 100.

Assumptions

All temperatures represent the same stable operating condition. Wet-bulb and condenser-water readings are assumed accurate.

Limitations

This calculator does not verify sensor accuracy, tower design, airflow, water flow, load, fan operation, or root cause. It does not apply universal healthy or unhealthy thresholds.