Hydrochlorofluorocarbon (HCFC), known as R-22, has been used as a refrigerant for more than 40 years by HVAC manufacturers. While HCFC’s are considered safe for the environment they do contain chlorine which is classed as an ozone-depleting chemical. The Clean Air Act set a target date of January 1, 2010 after which HVAC manufacturers can no longer build products that use R-22. Manufacturers of refrigerants will still be allowed to produce R-22 until January 1, 2020 after which time only recovery and recycling will provide R-22 for servicing older installed systems.
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