| 2007 NAICS | 2012 NAICS | 2017 NAICS | Corresponding Index Entries | |||
| 238220 | 238220 | 238220 | Air system balancing and testing | |||
| 238220 | 238220 | 238220 | Air vent installation | |||
| 238220 | 238220 | 238220 | Air-conditioning system (except window) installation | |||
| 238220 | 238220 | 238220 | Bathroom plumbing fixture and sanitary ware installation | |||
| 238220 | 238220 | 238220 | Blower or fan, cooling and dry heating, installation | |||
| 238220 | 238220 | 238220 | Boiler chipping, cleaning and scaling | |||
| 238220 | 238220 | 238220 | Boiler, heating, installation | |||
| 238220 | 238220 | 238220 | Central air-conditioning equipment installation | |||
| 238220 | 238220 | 238220 | Central cooling equipment and piping installation | |||
| 238220 | 238220 | 238220 | Central heating equipment and piping installation | |||
| 238220 | 238220 | 238220 | Chilled water system installation | |||
| 238220 | 238220 | 238220 | Chimney liner installation | |||
| 238220 | 238220 | 238220 | Commercial freezer installation | |||
| 238220 | 238220 | 238220 | Commercial refrigeration system installation | |||
| 238220 | 238220 | 238220 | Cooling tower installation | |||
| 238220 | 238220 | 238220 | Drain, waste and vent system installation | |||
| 238220 | 238220 | 238220 | Drinking fountain installation | |||
| 238220 | 238220 | 238220 | Dry heating equipment installation | |||
| 238220 | 238220 | 238220 | Duct work (e.g., cooling, dust collection, exhaust, heating, ventilation) installation | |||
| 238220 | 238220 | 238220 | Dust collecting and bag house equipment installation | |||
| 238220 | 238220 | 238220 | Exhaust system (e.g., kitchens, industrial work areas) installation | |||
| 238220 | 238220 | 238220 | Fire extinguisher installation | |||
| 238220 | 238220 | 238220 | Fire extinguisher installation and repair | |||
| 238220 | 238220 | 238220 | Fire sprinkler system installation | |||
| 238220 | 238220 | 238220 | Fireplace, natural gas, installation | |||
| 238220 | 238220 | 238220 | Fuel oil burner installation | |||
| 238220 | 238220 | 238220 | Furnace conversion (i.e., from one fuel to another) | |||
| 238220 | 238220 | 238220 | Furnace humidifier installation | |||
| 238220 | 238220 | 238220 | Furnace installation | |||
| 238220 | 238220 | 238220 | Furnace, forced air, installation | |||
| 238220 | 238220 | 238220 | Gas fitting contractor | |||
| 238220 | 238220 | 238220 | Gas line installation, individual hookup, contractors | |||
| 238220 | 238220 | 238220 | Heat pump installation | |||
| 238220 | 238220 | 238220 | Heating and cooling duct work installation | |||
| 238220 | 238220 | 238220 | Heating and ventilation system component (e.g., air registers, diffusers, filters, grilles, sound attenuators) installation | |||
| 238220 | 238220 | 238220 | Heating boiler installation | |||
| 238220 | 238220 | 238220 | Heating contractors | |||
| 238220 | 238220 | 238220 | Heating equipment installation | |||
| 238220 | 238220 | 238220 | Heating, ventilation and air-conditioning (HVAC) contractors | |||
| 238220 | 238220 | 238220 | Hot water heating system installation | |||
| 238220 | 238220 | 238220 | Hot water tank installation | |||
| 238220 | 238220 | 238220 | Household oil storage tank installation | |||
| 238220 | 238220 | 238220 | HVAC (heating, ventilation and air-conditioning) contractors | |||
| 238220 | 238220 | 238220 | Hydronic heating system installation | |||
| 238220 | 238220 | 238220 | Industrial process piping installation | |||
| 238220 | 238220 | 238220 | Kitchen sink and hardware installation | |||
| 238220 | 238220 | 238220 | Lawn sprinkler system installation | |||
| 238220 | 238220 | 238220 | Mechanical contractors | |||
| 238220 | 238220 | 238220 | Natural gas piping installation | |||
| 238220 | 238220 | 238220 | Oil burner installation | |||
| 238220 | 238220 | 238220 | Pipe fitting contractors | |||
| 238220 | 238220 | 238220 | Plumbers | |||
| 238220 | 238220 | 238220 | Plumbing and heating contractors | |||
| 238220 | 238220 | 238220 | Plumbing contractors | |||
| 238220 | 238220 | 238220 | Plumbing fixture installation | |||
| 238220 | 238220 | 238220 | Process piping installation | |||
| 238220 | 238220 | 238220 | Pumping system, water, installation | |||
| 238220 | 238220 | 238220 | Radiant floor heating equipment installation | |||
| 238220 | 238220 | 238220 | Refrigeration system (e.g., commercial, industrial, scientific) installation | |||
| 238220 | 238220 | 238220 | Sanitary ware installation | |||
| 238220 | 238220 | 238220 | Scrubber, air purification, installation | |||
| 238220 | 238220 | 238220 | Sewer hookup and connection, building | |||
| 238220 | 238220 | 238220 | Sheet metal duct work installation | |||
| 238220 | 238220 | 238220 | Snow melting system (e.g., hot water, glycol) installation | |||
| 238220 | 238220 | 238220 | Solar heating equipment installation | |||
| 238220 | 238220 | 238220 | Sprinkler system, building, installation | |||
| 238220 | 238220 | 238220 | Steam fitting contractors | |||
| 238220 | 238220 | 238220 | Sump pump installation | |||
| 238220 | 238220 | 238220 | Ventilating contractors | |||
| 238220 | 238220 | 238220 | Warehouse refrigeration system installation | |||
| 238220 | 238220 | 238220 | Warm air heating system installation | |||
| 238220 | 238220 | 238220 | Water heater installation | |||
| 238220 | 238220 | 238220 | Water meter installation | |||
| 238220 | 238220 | 238220 | Water softener installation | |||
| 238220 | 238220 | 238220 | Water system balancing and testing contractors | |||
| 238220 | 238220 | 238220 | Waterless fire suppression system installation | |||
| 238220 | 238220 | 238220 | Waterless fire suppression system installation and repair |