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.
totalpics/iStock/Getty Images. Heating, ventilation and air conditioning technicians repair, maintain, install and remove heating, cooling and ventilation systems in residential and commercial settings. Some HVAC technicians get additional training and certification to work on refrigeration systems.The Bureau of Labor Statistics says that those wishing to become HVAC technicians generally must become licensed to practice, but getting certification can improve employment opportunities.owever, entering a certificate or degree program can provide the education that an aspiring HVAC technician needs to pass the certification exam. Those who complete a formal degree program can also take the exam with only two years of work experience, as opposed to three.