Contractor Class
Class Code Class Description

A "class A air-conditioning contractor" means a contractor whose services are unlimited in the execution of contracts requiring the experience, knowledge, and skill to install, maintain, repair, fabricate, alter, extend, or design central air-conditioning, refrigeration, heating, and ventilating systems. Class A Contractors may also execute contracts requiring experience in the installation, maintenance, repair, fabrication, alteration, extension or design of duct work in connection with a complete system but only to the extent that such duct work is performed by the contractor as is necessary to complete an air-distribution system, boiler and unfired pressure vessel systems, and all appurtenances, apparatus, or equipment used in connection with them. A "class A air-conditioning contractor" shall not perform any work such as liquefied petroleum or natural gas fuel lines within buildings, potable water lines or connections, sanitary sewer lines, swimming pool piping and filters, or electrical power wiring. "registered contractor" means any contractor who has registered with the department pursuant to fulfilling the competency requirements in the jurisdiction for which the registration is issued. Registered contractors may contract only in such jurisdictions.