Central air conditioning systems make use of ductwork for distribution of air to the various rooms in a building. There is a unit that contains the cooling and heating elements called air handling unit. From this unit, cool air is blown into the rooms through a system of ducts. The amount of the air should be appropriate to room size according to calculations. Cool air moves to the rooms via the supply duct, supplying a particular amount of air into a room. An equal amount of warm or hot air is extracted from the rooms. The warm air moves via the return duct back to the air handling unit. As the air gets into the air handling unit, cooling elements present in the unit treat the air. Thereafter the air goes back into circulation as cool air. The process repeats itself to achieve continuous cooling
Split central air conditioning system
Central air conditioning system comes in two forms, split system or packaged system. The split system consists of an indoor and outdoor unit. The indoor unit house the evaporator while the outdoor unit houses the compressor and the condenser. A furnace or heat pump may also be part of the indoor unit. Similarly, during winter the reverse process can occur to warm up the rooms
Packaged central air conditioning systems
Packaged central air conditioners are popular especially for cooling large rooms or more than two rooms. The condenser, compressor, evaporator and expansion valve are housed in one unit. Sometimes the condenser and compressor may be in one unit. This allows gas to flow to individual units which have expansion valve and cooling coil in the rooms. These air conditioners are ideal for offices and small commercial buildings. The air conditioner is usually located at the rooftop or on a slab near the foundation of the building.
Most air conditioning service providers in Johannesburg and Gauteng air conditioning companies at large provide central aircon system support services.
Effectiveness & Costs
Central air conditioners are the most efficient air conditioners. The need for ductwork, however, makes the installation costs more expensive. However, this is non the less a once off cost. As such, over time, central air conditioning systems are actually cheaper given their energy saving quality. Furthermore, if ducting already exists in a building, or a furnace is already present, the installation costs become much less. Therefore in such situations, the central air systems is best both for installation costs and long term energy saving.
If you are thinking of installing or upgrading your central air conditioner, consider calling an experienced technician.
In spite of the high installation costs, central air conditioners continue to be popular for large rooms.