What type of boiler is used to furnish hot water for external use?

• A. Hot water supply boiler
• B. Steam boiler
• C. Heat exchanger
• D. Condensing boiler

Answer: (A)

The type of boiler used to furnish hot water for external use is a hot water supply boiler. This type of boiler is specifically designed to provide a consistent supply of hot water for various applications, such as heating systems or domestic hot water needs. Unlike steam boilers, which generate steam for heating, a hot water supply boiler directly heats water and maintains it at a set temperature for use.

This functionality is crucial in contexts such as residential buildings or commercial settings where hot water is needed on demand for tasks like washing, space heating, or industrial processes. Hot water supply boilers are typically equipped with features that ensure efficient heating and delivery of water, making them ideal for external applications where quick access to hot water is required.

While heat exchangers can transfer heat between fluids, and condensing boilers are an efficient type of heating system primarily used for heating spaces, they do not specifically fulfill the straightforward function of providing hot water for external use in the same direct manner as a hot water supply boiler. Steam boilers are more focused on generating steam rather than hot water, making them unsuitable for this particular application.