Air-Conditioning Contractor

Class A air-conditioning contractor (CA and RA):
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.

Class B air-conditioning contractor (CA and RA):
A contractor whose services are limited to 25 tons of cooling and 500,000 BTU of heating in any one system 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, including duct work in connection with a complete system. A "class B 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.

Class C air-conditioning contractor (CA and RA):
A contractor whose business is limited to the servicing of air-conditioning, heating, or refrigeration systems, including any duct cleaning and equipment sanitizing which requires at least a partial disassembling of the system, and whose certification or registration, issued pursuant to this part, was valid on October 1, 1988. NOTE: No person not previously registered or certified as a "class C air-conditioning contractor" as of October 1, 1988, shall be so registered or certified after October 1, 1988.