Central heating is designed to provide heat to all areas within a structure rather than just to one small portion of the structure like other heat sources do. The majority of the people who wish to have this type of warming appliance also have other systems to cool the entire structure or to ventilate the whole building. Because these things are often grouped together the devices that do all of the necessary climate control for a buildings are commonly referred to as HVAC. The HVAC stands for heating system, ventilation, and air conditioning, as a combined system to control temperatures, and climates inside a building.
Central heating takes place in one area inside the home or building using a combustion fuel in a furnace or in a boiler to create the warmth. The warm air that is produced is then forced through duct work so that it can be evenly distributed to all of the rooms. Sometimes the warmth is spread throughout by using water that is being circulated through piping. Some of the lager buildings will use steam being forced through the pipes to distribute the warm air.
Do not let the name of this type of system fool you. It is called a Geen warm water central heating system but it is not necessarily located at the central position in the house. The largest difference between this particular means of heating your house is that it is done in one place instead of in several heaters spread throughout the various rooms. This is what gives the unit its name. Generally in a commercial application these units will be located in a mechanical room, but in a single family dwelling they will normally be found in a furnace room.
The central heating system is all that is required in homes located in areas like northern Europe. They are also the only system that most of the residents of urban Japan have in their domiciles. The climates in these places are so mild that air conditioning is just not required for the people to live in comfort. Most of the new construction in these areas includes the warming units as part of the main construction.
The most commonly installed combination unit for places that have mild climates is the heat pump. With a heat pump you get a central heating appliance and you get the air conditioning you desire as well. The heat pump does not do well in climates that have temperatures that drop below freezing frequently. They are designed for the places that have cold, but not freezing nights and they are very adept at maintaining a comfortable interior temperature in the places that have high humidity, and high summer temperatures.
The type of central heating you will require to supply adequate warmth to your house will be dependent on several things. The size of the dwelling will be the most important, and the average temperatures in the place that you live, and the available fuels for the appliance will need to be considered as well.