Additional materials
Video
Working with Refrigerants
After Billy Durant purchased the Guardian Refrigerator Company with his own money in 1918, he incorporated the business into General Motors (GM) and renamed it Frigidaire. By 1929, Frigidaire had sold over one million refrigerators, the only trouble was, the nasty nature of refrigerants like sulfur dioxide, methyl chloride and even ammonia, kept Billy awake at night. Thus, GM created a subsidiary company designed to monitor the exploration of alternative refrigerants. Read more