| Class 2821: Manufacture of ovens, furnaces and furnace burners |
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| This class includes:
- manufacture of electrical and other industrial and laboratory furnaces and ovens, including incinerators - manufacture of burners - manufacture of permanent mount electric space heaters, electric swimming pool heaters - manufacture of permanent mount non-electric household heating equipment, such as solar heating, steam heating, oil heat and similar furnaces and heating equipment - manufacture of electric household-type furnaces (electric forced air furnaces, heat pumps, etc.), non-electric household forced air furnaces |