CFC’s (Chlorofluorocarbons) contain chlorine, fluorine and carbon. CFC’s are used as refrigerants in small appliances and automobiles. CFC’s are very stable and do not break down in the lower atmosphere. They can remain in the atmosphere for 100 years or more. Because HCFC’s contain hydrogen, they can break up quickly and have a short life span.
The government called for a phase out of CFC’s by 1996. Under the federal Clean Air Act, HCFC’s will be phased out by 2030. Because the new units use HCFC’s, they will be available until 2030.
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.