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ARLINGTON, VA--Building owners in the United States last year replaced or converted 2594 comfort cooling chillers that use chlorofluorocarbons (CFCs), leaving an estimated 38,800 of the units that still rely on CFC refrigerants. The United States banned CFCs from production because of concerns about depletion of the Earth's protective ozone layer.
A survey of chiller manufacturers released annually by the Air-Conditioning and Refrigeration Institute (ARI) showed the impact of the weak U.S. economy in 2002 as the pace slowed from earlier years. ARI said 379 conversions and 2215 chillers replaced non-CFC equipment using alternative refrigerants.
There were approximately 80,000 large tonnage liquid chillers using CFCs in the early 1990s when phase out of the units began in preparation for an end to production of CFCs on December 31, 1995. Stockpiled virgin CFC refrigerants and CFCs reclaimed from chillers no longer in service are the only sources of supply of CFCs available to building owners.
According to the survey, ...