Heating systems can be categorised into one of two main types these are; indirect heating systems and direct heating systems. The differences between the two systems will be outlined below

 

Direct heating systems

Direct heating systems use individual stand alone heaters in each room where heating is required. The most common form of direct heating is the use of gas, coal or electric heaters in a domestic property. The capital and installation costs of any heating system are determined by size and complexity. For small systems direct heating has a low initial cost and can be easily expanded at a later date. Control of individual heaters is simple to achieve but group control, because of the physical separation, is more complex. Each heater must be provided with its own fuel supply and flue. Direct heating is extensively used as a cost effective form of heating in domestic, industrial and commercial buildings.

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Indirect heating systems

Indirect heating systems are known as central heating systems in houses because they generate heat at a central location, the boiler. The heat must then be removed from the boiler and delivered to each room. It is carried there by a heat transfer medium, which can be water, steam or air. Pipes are used to direct the flow of steam and water and ducts guide the movement of warm air. Heat emitters such as radiators are required in the rooms to "hand over" the warmth from the heating system to the room air.