Typical Convection Coefficients to Estimate Thermal Transfer
| Fluid and Convection Mode | BTU / (hr * sq. ft. * F) | W / (sq. m * K) |
| Air, Free Convection | 0.1 to 0.5 | 0.5 to 2.5 |
| Water, Free Convection | 0.5 to 20 | 20 to 100 |
| Air, Forced Convection | 0.1 to 5 | 0.5 to 30 |
| Water, Forced Convection | 50 to 2,000 | 300 to 10,000 |
| Oil, Forced convection | 10 to 300 | 50 to 2,000 |
| Boiling Water | 500 to 10,000 | 3,000 to 60,000 |