My hubby worked in the air conditioning field for some time but never minded going through the process to get his journeyman's license. He recently completed the paperwork and paid $10 to obtain his apprentice license, which is required to get his journeyman's license. The document provides information about becoming a heating and air conditioning technician in Baltimore, including licensing requirements, apprenticeship programs, and exam fees. Contractors need a license to do HVACR work and licenses are granted by the Baltimore State Board of HVACR Installers. Apprenticeship programs involve working for a contractor for 4 years while taking related training classes twice a week, and wages start low and increase over the 4 years.