The depletion of the ozone layer has brought about laws to protect the earth from harmful release of chemicals. Coolants or Freon especially CFC and even HCFC are damaging to the ozone causing the EPA to require Air Condition technicians and others using chemical as a technician would to be certified. The goal of this app is to familiarize you with some of the required information needed to take the EPA Refrigerant Certification.
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