Your home’s heating and cooling play a major role in your family’s
comfort, so choosing the right system is important. If you’re thinking
about upgrading to a
new air conditioner in Portland, then you may have questions about different units. Use this
guide to learn about how central air conditioning works.
To cool a home, a central air conditioning unit uses several processes
which include temperature control, air circulation, and cooling. A thermostat
is located on a wall in the central area of the home, and it is used to
regulate how cool the system should make the home. Once the thermostat
detects that the house is warmer than the programmed temperature, it switches
on the air conditioner.
While individual air conditioning units can vary in their design, each
central air system has several main components that operate in similar
ways. The condensing unit is the part that is located outside of the home
and contains the condenser coils, condenser fan motor, and compressor.
Inside of the home is the part of the unit that houses the evaporator
coils, which are located over an air handler or a furnace. The compressor’s
job is to compress the refrigerant inside the condenser coils, which is
in gas form, into a liquid. This liquid is then pumped into the evaporator
coils, where it expands and turns into a gas, a process which cools the
The air handler or furnace uses a fan to pull air in through the return
vent, blow it over the evaporator coils to cool it, and then push it through
the system’s ductwork and out through vents that are located throughout
the home. This process continues to cool the air in the home until the
thermostat detects that the air has reached the correct temperature. Once
your home’s air is cooled to the right temperature, the thermostat
triggers the fan and condenser unit to turn off.