Class Code: 5537

Per NCCI's Scopes Code Description:

This classification applies to the installation, service, and repair of forced-air heating, ventilation, air-conditioning, refrigeration systems, and any combination of one or all of these forced-air systems. In terms of an HVAC system, “refrigeration” means the refrigerant in an air-conditioning system. The installation, service, and repair of commercial refrigeration units such as grocery store coolers and walk-in coolers, which are not connected to an HVAC system, are classified in accordance with the refrigeration classifications in NCCI’s Basic Manual.

Code 5537 is an all-inclusive classification for nonportable forced-air heating, ventilation, air-conditioning systems, and evaporative cooling systems. It includes any electrical wiring, cleaning, oiling and adjusting, and plumbing or sheet metal work connected with the operations at the same job site when performed by the same Code 5537 contractor.

Code 5537 applies to the installation of various types of HVAC forced-air systems. This includes installing the indoor and outdoor equipment, refrigerant lines, supply air outlets and returns, duct runs, control system, and gas furnace vent pipes. It also applies to charging the refrigerant system.

Special Conditions:

•    Specialist subcontractors performing only a specialty trade part of the installation on an HVAC contract (e.g., electrical, plumbing, and sheet metal) must be separately rated to the appropriate construction classification applicable to their work.

Related Operations Not Classified to Code 5537:

•    Hydronic systems must be assigned to Code 5183.
•    Solar systems—installation of plumbing must be assigned to Code 5183.
•    Solar systems—panel installation on roofs must be assigned to Code 5551.
•    Duct cleaning operations are separately rated to Code 9014.
•    Portable air-conditioning units are separately rated to Code 9519.
•    Refer to Code 9519—Household and Commercial Appliances—Electrical—Installation, Service or Repair & Drivers for the installation, service, and repair of refrigeration appliances.
•    Refer to Code 3076 if employer operates a sheet metal shop wherein various products are manufactured for others.
•    Refer to Code 8601 for risks that engage exclusively in airflow balancing and testing of nonportable air-conditioning units.

Rate per $100. of Renumeration: $ 3.40

Construction Exemption Required: Yes