Boilers are classified into different types based on their working pressure and temperature, fuel type, draft method, size and capacity, and whether they condense the water vapor in the combustion gases. Boilers are also sometimes described by their key components, such as heat exchanger materials or tube design.

What are the three types of boilers?

There are three main types of boilers you can install into your home: combi boilers, heat only (regular boilers) and system boilers.

How boilers are classified in thermal engineering?

The boilers may be classified as follows:

Horizontal, Vertical and Inclined Boilers. Externally Fired and Internally Fired. Fire-tube boiler and Water-tube boiler. Natural circulation and Forced Circulation.