It's a cool field where the job prospects are hot. That's the message that a lot of trade associations and education organizations are trying to get out about heating, ventilation, air conditioning and refrigeration (HVACR), and they have the statistics to back them up. The Occupational Outlook Handbook from the Bureau of Labor Statistics says that, "Opportunities should be very good" for HVACR technicians with technical school or formal apprenticeship training. How good? According to the Air-Conditioning and Refrigeration Institute (ARI), an additional 20,000 technicians and installers are needed each year to meet the demands of the industry. This document contains the job description of heating and air-conditioning technicians, along with information on certification.