TWINVAC QUALITY HEAT TREATMENT

This sub-class includes manufacture, repair and/or maintenance of: - electrical and/or other industrial and/or laboratory furnaces and/or ovens, including incinerators - burners - permanent mount electric space heaters, electric swimming pool heaters - permanent mount non-electric household heating equipment, such as solar heating, steam heating, oil heat and/or similar furnaces and/or heating equipment - electric household-type furnaces (electric forced air furnaces, heat pumps etc.), non-electric household forced air furnaces - mechanical stokers, grates, ash dischargers, etc.