Inside air conditioning systems is liquid/gas refrigerant.There are two types of this refrigerant available for use,R-22 (more commonly known by its brand name Freon),and a new alternative R-410A. Refrigerant is a substance whichabsorbs heat by changing states (evaporating) from liquid to gas. It releases heat by changingstates (condensing) from gas back to liquid.An air conditioning system does not consume refrigerant, but reuses it.As long as there are no leaks in the refrigerant circuit, there is no need to ever add morerefrigerant to an air conditioning system.Although R-22 is an effective refrigerant, if it is released into the atmosphere it cancontribute to the depletion of the Earth’s ozone layer.The EPA has mandated the phasing out the use of R-22.It is being replaced by the now-available R-410A.As of 2010, manufacturer's are required to make all new air conditioners with R-410A.Units using R-22 are still available for sale. However, they no longer are sold containingrefrigerant, and will require your technician to fully charge the system after installation.R-22 refrigerant is becoming increasingly expensive, and at the current and expectedfuture cost of R-22, it is often more cost effective to install equipment containing the new R-410A.By 2020, R-22 will no longer be manufactured, but will still be recycled and available for sale.
As of 1993, R-22 refrigerant can only be handled by technicians who are EPA certified.While 90 percent of an air conditioning installation can be performed by the average homeowner, if the equipment uses R-22 refrigerant, part of the installation requires the work of an EPA-certified technician. This is mandated by federal law.Any maintenance, service, repair, or disposal of equipment that could be reasonably expected to release R-22 refrigerants into the atmosphere by violating the integrity of the refrigerant circuit must be handled by an EPA-certified technician.Only an EPA-certified technician can attach and detach hoses and gauges from your R-22 condensing unit to measure pressure within the appliance. Only an EPA-certified technician can add or remove R-22 refrigerant from the system. To service the compressor of a condensing unit, the refrigerant must first be captured and then recycled by an EPA-certified technician.Activities such as painting the appliance, re-wiring an external electrical circuit, replacing insulation on a length of pipe, or tightening nuts and bolts on the appliance are not reasonably expected to violate the integrity of the refrigerant circuit and can be performed by a homeowner.Need a contractor? We'll help you get one.Click herefor details on our Contractor Assistance Program.
When installing central air, an EPA-certified technician will:
It is recommended that you allow a skilled contractor to also:
For more information on installing central air and what aspects of the installation the average homeowner can and can’t perform, please click here