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.
Complete an accredited HVAC program (6 months to 2 years). While this step can be waived in some states for candidates with extensive experience or an apprenticeship*, it may be advisable to complete a more formal HVAC training program at a community college or trade school, especially for those seeking certification.