| Naics index | Naics index description |
|---|---|
| 333414 | Baseboard heating equipment manufacturing |
| 333414 | Boilers, heating, manufacturing |
| 333414 | Burners, heating, manufacturing |
| 333414 | Fireplace inserts (i.e., heat directing) manufacturing |
| 333414 | Furnaces (except forced air), heating, manufacturing |
| 333414 | Furnaces, floor and wall, manufacturing |
| 333414 | Gas burners, heating, manufacturing |
| 333414 | Gas fireplaces manufacturing |
| 333414 | Gas space heaters manufacturing |
| 333414 | Gas-oil burners, combination, manufacturing |