Abstract
New, more stringent electrical efficiency standards for refrigerated home appliances will go into effect in 1993. In order to meet these new standards, manufacturers of appliances may have to use foams for insulation that have lower thermal conductivity values than their current production foams. In 1994, the substantial tax increase on CFC-11 used in insulating foams will likely result in the replacement of CFC-11 blown foams with HCFC blown foams. It is well known however, that HCFCs have about 25% higher thermal conductivity values than CFC-11, and drop in replacement foams with HCFCs have about 5 to 10% higher values. Miles Inc. has developed and previously published data [1] on microcell HCFC polyurethane foams that offered about 2 to 3% lower thermal conductivities than conventional CFC-11 blown production foams
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