A boiler is a device made from copper, steel or cast iron to transfer heat from a combustion chamber (or electrical coil) to water in the liquid phase vapour phase or both. boiler are classified both by the fuel used and by the operating pressure.fuels includes fuel oil, wood, coal . electricity boiler produce either hot water or stream at various pressure

Hot water boiler is most important part of heating system in home building and industry. The boiler work to applying heat to water. The fuel used is natural gas propane or electricity. Hot boiler is available as small portable unit and large unit used to heat building and industrial use.

Working principle of hot water boiler

The basic working principle of boiler is very very simple and easy to understand. The boiler is essentially a close vessel inside which water is stored.fuel is burn in furnace and hot gases are produce. These hot gases come in contact with water vessel where the heat of these hot gases transfer to the water and consequently steam is produced in the boiler. Then this steam pipe to the turbine of thermal power plant. There are many different type of boiler utilized for different purposes like a running a production unit, sanitizing some area, to warm up the surrounding etc.