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This was an article written by John Murphy regarding the benefits of improved foam insulation for use in appliances.

There is both economic and environmental pressure on the Appliance Industry to produce appliances that are energy efficient as well as non-damaging to the environment. The choice of foam blowing agent plays a major role in the efficiency of the appliance and upon its impact on the environment both now and in the future [a legacy of encapsulated BAs and ever tighter restrictions]. The change from CFC to HCFC to HFC has had its challenges, both in efficiency and particularly in cost. HFE conversion will also lead to high cost insulation.