What is a Boiler? A boiler is a piece of equipment used to heat water or other liquids. This heated liquid can then be used for various purposes, such as: Space heating: Warming homes, offices, and other buildings.Domestic hot water: Providing hot water for showers, baths, and laundry.Industrial processes: Heating liquids used in manufacturing or processing. Types of Boilers There are several types of boilers, each with its own unique characteristics and applications. Some common types include: Gas-fired boilers: These boilers use natural gas or