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.
HVAC Certification. HVAC, or Heating, Ventilation and Air Conditioning technicians are people specializing in the installation, maintenance and repair of our HVAC systems. They are required by the State Licensing Board (most of the state) and employers to obtain certification or licensure before they can practice as an HVAC technician.