HVAC 101
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HVAC 101

How a Central AC Works  

Facts:

The typical central air conditioning system is a split system, with an
outdoor air conditioning, or "compressor bearing unit" and an indoor
coil, which is usually installed on top of the furnace in the home.
Using electricity as its power source, the compressor pumps
refrigerant through the system to gather heat and moisture from
indoors and remove it from the home.
Heat and moisture are removed from the home when warm air from
inside the home is blown over the cooled indoor coil. The heat in the
air transfers to the coil, thereby "cooling" the air.
The heat that has transferred to the coil is then "pumped" to the
exterior of the home, while the cooled air is pumped back inside,
helping to maintain a comfortable indoor temperature.
Central air conditioning can also be provided through a package unit
or a heat pump.

Benefits:  

Indoor comfort during warm weather - Central air conditioning helps
keep your home cool and reduces humidity levels.
Cleaner air - As your central air conditioning system draws air out of
various rooms in the house through return air ducts, the air is pulled
through an air filter, which removes airborne particles such as dust
and lint. Sophisticated filters may remove microscopic pollutants, as
well. The filtered air is then routed to air supply ductwork that carries
it back to 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.