(1) Class A -- Entitles the licensee to perform HVACR work without limitation to BTUH or horsepower capacities;

(2) Class B -- Entitles the licensee to perform HVACR work on air conditioning systems that develop a total of not more than 15 tons cooling capacity per unit or 1 million BTUH heating input per unit and refrigeration systems of 15 H.P. or less per unit; or

(3) Class C -- Entitles the licensee, who is in the business of servicing and repairing heating, ventilation, air conditioning or refrigeration equipment for the public to service, repair or replace components of HVACR equipment and to perform HVACR work on air conditioning systems that develop a total of not more than 15 tons cooling capacity per unit or 1 million BTUH heating input per unit and refrigeration systems of 15 horsepower or less per unit. A Class C license holder shall not install any original HVACR equipment or replace any existing HVACR equipment.

(4) Class D -- Entitles the licensee to perform “Sheetmetal” work as it relates to ductwork for HVACR systems without regard to or limitation of horsepower of the system to which the duct connects. The licensee in this category is prohibited from the sale, installation and service of HVACR equipment and systems.

(5) Class E -- Entitles the licensee to perform “Refrigeration” work as defined in Ark. Code 17-33-101 without regard to or limitation of horsepower. The licensee in this category is prohibited from the sale, installation and service of heating and air conditioning equipment used for the treatment of air for human comfort requirements.

(6) Class L -- Entitles the license holder to a “Lifetime” license to perform HVACR service and maintenance work on air conditioning systems that develop a total of not more than 15 tons cooling capacity per unit or 1 million BTUH heating input per unit and refrigeration systems of 15 H.P. or less per unit only. A Lifetime license holder shall not install any original equipment or replace any existing HVACR equipment.