11 Air reheaters for commercial purposes, air conditioning fans, air conditioning units and systems, namely, air handling units, air cooled condensers, and self-contained air conditioners for military land vehicles and sea vessels; electric fans for commercial and industrial purposes, namely, boiler draught fans, circulators for pumping gas around a closed circuit, circulators for gas cooled nuclear reactors, cooling tower fans, ventilating fans, exhaust fans, fans for blowing hot air, pelletizing plant fans, propeller fans and sinter plant fans, fans for heating and cooling systems, fans for combustion plants and heavy-duty industrial fans and fans for ventilating gases in steel works and chemical plants