A boiler, also known as a furnace in British English, is an electrical heating device usually used to heat an entire building including homes. Boilers are typically used as part of a primary heating system. The word comes from Latin for “oven” which in turn comes from the word for “oven”. In the old days, homes that didn’t have proper furnaces were known as ‘ovens’. However, it is not a true word as furnaces are generally made of metal and other materials, not wood.this link
Different types of furnaces can be used to provide heat. Gas furnaces or oil furnaces work on burning fuels and the resulting hot air or steam is turned into heat. Electric furnaces are similar to gas furnaces but do not require any fuel or electricity. A thermostat controls how much air or steam is produced. The most common type of heating appliance is the gas-fired furnace. It is considered the most effective and efficient way of heating because of its efficiency. However, it is more expensive than the electric type and requires maintenance.
There are various styles of furnaces available. A traditional boiler has a bowl-shaped opening in front. The bowl shape can be either rectangular or circular. It is placed above a water reservoir or cistern and is surrounded by an internal firebox that serves as the main venting point for the heating mechanism. Most of the time, these boilers are fitted with either a cylinder or pipe that can be used to channel the gas inside the cylinder or pipe. If you have a traditional boiler then it is likely to use the old fashioned method of circulating heated air and steam through the chimney. However, if you are looking for a more modern, clean and efficient heating system, then a modern boiler is your best bet.