South Dakota to Arkansas: master HVAC technician license reciprocity

Arkansas's highest HVAC credential is the HVACR license issued in four classes by the HVACR Licensing Board: Class A (unlimited), Class B (systems up to 25 tons cooling, 1,000,000 BTUH heating or 15 hp refrigeration), Class D (sheet metal ductwork) and Class E (refrigeration); Act 746 of 2025 repealed Class C and moved active Class C licenses to Class B. It is treated here as the master level because Ark. Code §17-33-303(a) issues it to the individual who designs, installs or services HVACR systems, and that person becomes the 'designated license holder' responsible for the work and for registering employees. A new applicant with no licensing background must be 18, show two years of experience as an HVACR contractor or employee (Board-approved education may substitute) through notarized employer affidavits, and pass the open-book class exam administered by Prov ($100, 70% to pass); the annual license fee is $200 for Class A and $150 for B, D and E, with $250,000 liability insurance and eight hours of continuing education per International Mechanical Code cycle. The Board states it has no reciprocal agreements with any other state, but its rules direct it to approve, without examination, apprenticeship, education or training, any applicant holding a license in good standing from a jurisdiction whose HVACR licensing laws are 'substantially similar', meaning one that has adopted a national model mechanical code and uses a comprehensive exam created and proctored by a national examination agency. Under §17-33-104 a state licensee needs no city or county license.

South Dakota does not issue a master HVAC, mechanical or refrigeration license and has no state board for the trade; only the State Fire Marshal's boiler inspection program exists at state level, and it certifies boilers, not installers. The master-level credential exists only in cities that license mechanical contracting. In Sioux Falls the person-held credential is the Master Mechanic, earned by documenting four years of experience (2,000 hours per year) with a licensed mechanical contractor and passing the city's four-hour open-book exam on the International Mechanical and Fuel Gas Codes ($75, 75% to pass); the master mechanic then qualifies a Mechanical Contractor license ($200 for two years, $10,000 compliance bond, liability insurance), and a separate Refrigeration Contractor license is earned by a shorter IMC exam. In Rapid City the Mechanical Contractor (Class C trade) license is issued to a firm whose designated license holder has six years of verifiable experience, passes the city exam, and carries $1,000,000 liability insurance; it runs three years with six hours of continuing education. Neither city recognizes out-of-state licenses: Sioux Falls says it does not reciprocate any license and requires its exam of everyone, and Rapid City's code recognizes other agencies' licenses only for general building contractor classes. An out-of-state master or HVAC contractor should expect to sit the local exam in each city where they contract.