An HVAC contractor is typically someone that works on their own. They will look for service contracts, like designing new HVAC systems for new buildings. If the project is small enough, the HVAC contractor will perform the job by themself. If the job is larger and requires more hands, they might hire HVAC technicians to assist with the work. An HVAC technician is either a full-time technician or in the middle of a paid apprenticeship program. If they're an apprentice, they're typically employed full-time by an HVAC contractor or business.