| 2007 NAICS | 2012 NAICS | 2017 NAICS | Corresponding Index Entries | |||
| 333414 | 333414 | 333414 | Baseboard heating equipment manufacturing | |||
| 333414 | 333414 | 333414 | Boilers, heating, manufacturing | |||
| 333414 | 333414 | 333414 | Burners, heating, manufacturing | |||
| 333414 | 333414 | 333414 | Fireplace inserts (i.e., heat directing) manufacturing | |||
| 333414 | 333414 | 333414 | Furnaces (except forced air), heating, manufacturing | |||
| 333414 | 333414 | 333414 | Furnaces, floor and wall, manufacturing | |||
| 333414 | 333414 | 333414 | Gas burners, heating, manufacturing | |||
| 333414 | 333414 | 333414 | Gas fireplaces manufacturing | |||
| 333414 | 333414 | 333414 | Gas space heaters manufacturing | |||
| 333414 | 333414 | 333414 | Gas-oil burners, combination, manufacturing | |||
| 333414 | 333414 | 333414 | Heaters, space (except portable electric), manufacturing | |||
| 333414 | 333414 | 333414 | Heaters, swimming pool, manufacturing | |||
| 333414 | 333414 | 333414 | Heating equipment, hot water (except hot water heaters), manufacturing | |||
| 333414 | 333414 | 333414 | Heating units, baseboard, manufacturing | |||
| 333414 | 333414 | 333414 | Hydronic heating equipment manufacturing | |||
| 333414 | 333414 | 333414 | Kerosene space heaters manufacturing | |||
| 333414 | 333414 | 333414 | Logs, gas fireplace, manufacturing | |||
| 333414 | 333414 | 333414 | Oil burners, heating, manufacturing | |||
| 333414 | 333414 | 333414 | Radiators (except motor vehicle, portable electric) manufacturing | |||
| 333414 | 333414 | 333414 | Room heaters (except portable electric) manufacturing | |||
| 333414 | 333414 | 333414 | Solar energy heating equipment manufacturing | |||
| 333414 | 333414 | 333414 | Solar heating systems manufacturing | |||
| 333414 | 333414 | 333414 | Space heaters (except portable electric) manufacturing | |||
| 333414 | 333414 | 333414 | Steam heating equipment manufacturing | |||
| 333414 | 333414 | 333414 | Swimming pool heaters manufacturing | |||
| 333414 | 333414 | 333414 | Unit heaters (except portable electric) manufacturing | |||
| 333414 | 333414 | 333414 | Wood stoves manufacturing |