Central Heating Through The Ages
Central heating is very much thought of as a modern-day convenience. However it has been dated back to the ancient Greeks. A system of central heating provides heat to the interior of (or a portion of) a house or factory etc.
Central heating is believed to have been invented around the 350 BC mark to warm the Great Temples and the homes of the wealthy. Their systems worked by circulating warm air through flue systems in the floor. In todays systems, we can power blowers with electricity, therefore billions of homes around the world are heated by forced air systems.
These forced air systems draw air into their pipes through to a furnace where the air is warmed and sent back into the room. There are different sizes of each model system so as to provide for every size room.
These forced-air systems are sometimes used together with a humidifier, an air filter and/or an air-conditioning unit. The piping in the system will usually be metal wrapped in an insulating foam of some kind to keep maximum heat in.
Central heating is different to local heating because the generation of heat happens in one place, such as a furnace room. The most commonly found way of generating heat involves combusting fossil fuels in a furnace or boiler. The heat then gets circulated, usually by air that is being forced through pipe work, by steam thats being pushed through piping or by water thats being forced through piping.
In many parts of northern Europe, where most people do not need air conditioning in their homes because of the fairly cold weather they have there anyway. Most new houses come with installed central heating. Areas like this will usually use district heating, oil-fired systems or gas heaters.
Steam heating systems, heated by oil, coal or gas can be found in the USA, Russia and Europe, usually in the bigger buildings. Electric systems are found less and are practical only with cheap electricity or where geothermal heating pumps are used.
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