What is HVAC class A contractor?

It’s a State issued license, "HVAC contractors" (Abbr: HVA), which certifies those individuals whose work includes the installation, alteration, repair, or maintenance of heating systems, ventilating systems, cooling systems, steam and hot water heaters, boilers, process piping, and mechanical refrigeration systems, including tanks incidental to the system. This classification does not provide for fire suppression installations, sprinkler system installations, or gas piping. A firm holding a HVAC license is responsible for meeting all applicable tradesman licensure standards. This classification may install backflow prevention devices incidental to work in this classification. Locally issued business licenses are not considered a contractor license and to take on a contract under such license solely is a violation of state and local contracting laws.  more