Apparatus, namely, air conditioners, air conditioning installations, hot air cereal dryers, gas burners, fuel oil burners, industrial gas cookers, electric fans, ventilation exhaust fans, industrial gas water heaters, industrial hot water heaters, heating furnaces, heating installations, steam accumulators, industrial steam boilers, steam generating installations, gas stoves, electric stoves, fuel oil stoves, industrial water heaters. All of the aforesaid goods used for heating, steam generat...