A vacuum boiler is a hot water boiler, also known as a vacuum hot water generator, primarily used for civil heating purposes. It can specifically be applied in places like hotels, residential complexes, and commercial venues for heating and supply of hot water for sanitation.

A vacuum boiler forms a vacuum environment within a sealed furnace body, fills it with heat transfer fluid, heats the fluid through combustion or other methods, then the heated fluid evaporates and condenses on a heat exchanger, where it heats the water that requires heating.

Vacuum boilers are free from risks of expansion, explosion, or cracking, ensuring safety and reliability. They are versatile, capable of providing heating water, domestic hot water, and swimming pool heating simultaneously with a single unit. Designed for a lifespan of over 20 years, they can be placed in basements or rooftops without restrictions from national authorities. Vacuum boilers are cost-effective, free of scale and corrosion issues, and are smaller in size compared to conventional boilers. They can be modularly并联 arranged for more efficient and rational boiler operation. Any one unit can be activated independently when the rated heat is not required. With high levels of automation and building automation connectivity, they can be managed without personnel. Even if attended, no operation license is necessary for the attendants; basic training is sufficient.