Common types of boilers include steam boilers, hot water boilers, and thermal oil boilers. Based on the fuel type, they can be categorized as gas-fired boilers, oil-fired boilers, coal-fired boilers, biomass boilers, and electric boilers.

Industrial boilers are widely used to produce steam or hot water for various industries, including power generation, central heating, food processing, chemical manufacturing, textile production, paper mills, and hospital heating systems.