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All toolsCalculatorsMechanicalHeat Exchanger Sizing

Heat Exchanger Sizing

Size a heat exchanger both ways: duty and temperatures to LMTD and required UA, or UA and flows to outlet temperatures via effectiveness-NTU.

Mode

Duty & temperatures

kW
°C
°C
°C
°C

Flow arrangement

1 = true counterflow. For multi-pass / cross-flow arrangements read F (< 1) from the F-charts for the geometry.

Enter a heat duty (kW)
ensign.software · 28 October 2026The Ensign Toolbox