Expertise of people is one of the essential needs to construct and operate a clean, safe, dependable, and efficient plant. It plays a significant role in all aspects of plant setup, from functional requirements for daily operations and maintenance to the establishment of an organizational-wide system and structure for efficient energy management. The comprehensive boiler guide on Knowledgepedia is its goal. It provides fundamental ideas, theory, and useful information for each component of the boiler system in order to improve working knowledge.