A new generation of contractors and technicians may not know how the industry moved from CFCs to HFCs. To a great measure it was the result of government regulations, but officials merely called on our industry to come up with alternatives to CFCs. The industry responded.

DuPont, for example, has taken part in the search for alternatives from the beginning. The search for acceptable alternatives is not over, stated the Wilmington, DE, company, which is marking its 200th year in business this year.