1 The way your foot is shaped puts too much pressure on your big toe joint. Because bunions can run in families, some experts believe that the inherited shape of the foot makes some people more likely to get them.  Your foot rolls inward too much when you walk. A moderate amount of inward roll, or pronation, is normal.
Step 3: Route 2: Earn a Certificate or Degree. Enroll in an HVAC certificate or associate's degree program at a community college, trade school or technical academy. The programs can take between six months and two years to complete.
1 An associate's degree in HVAC Technology costs $15,000-$35,000 and can be completed in two years. 2  The Refrigeration School in Phoenix, AZ, offers HVAC training via a one-year certificate program for $19,125 or a two-year associate's degree for $29,420.