My father retired recently from the HVAC business after morethan 45 years. He spent one career at Carrier, and a secondat Siemens. At his retirement party, there were a group of industryfriends, some with experience stretching back to the very early daysof the industry. One of these old friends had been a mechanic forthe last 60 years, mostly working on centrifugal chillers. They bothhad a great time reminiscing about the old days.