Forced circulation boiler
![Comparison between Natural Circulation and Forced Circulation](/Images/godic/202501/13/NCFC_Comparison5922.jpg")
A forced circulation boiler is a boiler where a pump is used to circulate water inside the boiler. This differs from a natural circulation boiler which relies on current density to circulate water inside the boiler. In some forced circulation boilers, the water is circulated twenty times the rate of evaporation.