Central air conditioning (or central A/C) is a system in which air is cooled at a central location and distributed to and from rooms by one or more fans via ductwork. The compressor is what makes the whole process of air conditioning work like magic. The compression of the refrigerant gas enables it to release heat from the house, and in turn, cool air is produced.
Advantages of a central air conditioning unit
Cooling comfort during the heat of summer – Central air conditioning helps keep your home cool and reduces humidity levels.
Cleaner air – As your central air-conditioning system draws air out of the rooms in your house through return air ducts, the air is pulled through an air filter, which removes airborne particles such as dust and lint. Sophisticated filters, like those found in the Lennox Healthy Climate® purification systems, may remove microscopic pollutants, as well. The filtered air is then routed to air supply ductwork that carries it back to the rooms.
Quieter operation – Because the compressor-bearing unit is located outside the home, the indoor noise level from its operation is much lower than that of a free-standing air- conditioning unit.
Types of central air conditioners
There are two types of central air conditioners: a split system or a packaged unit.
In a split-system central air conditioner, an outdoor metal cabinet contains the condenser and compressor, and an indoor cabinet contains the evaporator. In many split-system air conditioners, this indoor cabinet also contains a furnace or an air handler. The air conditioner’s evaporator coil is installed in the cabinet or main supply duct of this furnace or heat pump. If your home already has a furnace but no air conditioner, a split system is the most economical central air conditioner to install.
In a packaged central air conditioner, the evaporator, condenser, and compressor are all located in one cabinet, which usually is placed on a roof or on a concrete slab next to the house’s foundation. Air supply and return ducts come from indoors through the home’s exterior wall or roof to connect with the packaged air conditioner, which is usually located outdoors. Packaged air conditioners often include electric heating coils or a natural gas furnace. This combination of air conditioner and central heater eliminates the need for a separate furnace.
Benefits of ducted AC system in Philadelphia
Indoor comfort during warm weather – Central air conditioning creates consistent temperatures throughout conditioned spaces.
Higher quality of indoor air while circulating through central filtration
Easier user friendly operation – Central air conditioning systems are very easy in operation. Most systems come with programmable advanced controls, which are easy to set up and run.
Noise Reduction – The main reason for this is due to the compressor-bearing unit being located outside your home, thus the noise level from its operation is low.
Ability of most common central air conditioners to run in heating mode – Heat pumps or combinations with gas furnace produce heating for conditioner spaces. Both AC and heat equipment utilize the same blower to move air through the same air duct system. Such central air HVAC combinations help to save money on installation.
Useful info about central air conditioning from Energy.gov
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