NEW YORK -- Retailers are challenging the wisdom of changing all refrigerant systems to carbon-free coolants and insist that a short-term strategy centered on interim gases remains the industry's best course. Many retailers are converting their systems primarily to interim hydrochlorofluorocarbon (HCFC) gases, also known as R-22s. HCFCs are now the cheapest coolant on the market -- down to less than $2 per pound in some areas last week -- while the prices of chlorofluorocarbon gases have ...

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