The term, “HVAC” stands for Heating, Ventilation, and Air Conditioning. HVAC contractors are those technicians who specialize in the installation and maintenance of furnace, boilers, heat pumps, central air conditioners and also various other kinds of air conditioners. Besides installing, maintaining, and repairing of HVAC units, these HVAC contractors also help consumers decide on the kind of HVAC unit that is most suitable for their homes. Thus, in this way the HVAC business is a little different from the business of other costly appliances. For example, never is a car mechanic hired before buying a car. Here it needs to be noted that in order to become an HVAC contractor technical skills are a must.