Master Restricted: A master restricted license entitles the licensee to provide installation and maintenance work in one or more areas of HVACR work. The categories of HVACR work are air conditioning, full heating, forced air, heating, hydronic heating, refrigeration and ventilation. License Requirements
Limited Contractor: A limited contractor license entitles the licensee to exclusively maintain and repair one or more HVACR systems. The categories of HVACR work are air conditioning, full heating, forced air heating, hydronic heating, refrigeration and ventilation. License Requirements
Journeyman: A journeyman license entitles the licensee to perform HVACR services while under the direction and control of a licensed contractor. License Requirements
Journeyman Restricted: A journeyman restricted license entitles an individual to perform one or more specialized HVACR services while under the direction and control of a licensed contractor. License Requirements
Apprentice: Anyone who is entering the trade of HVACR work must obtain an apprentice license. There are no prerequisites for an apprentice license. Online license application.
Maryland Department of Labor
1100 North Eutaw Street, Baltimore, MD 21201
Dial 7-1-1 to place a call through Maryland Relay