sterilization, disinfection and decontamination apparatus, namely, sterilizers, waste sterilizers, [ water sterilizers, air sterilizers, ] disinfectant apparatus for medical purposes, [ apparatus for disinfecting water, ] apparatus for disinfecting biomedical waste; [ and dish disinfectant apparatus for industrial purposes; electric furnaces for heat treatment; water treatment filters; air treatment apparatus, namely, air purifiers, and ionization apparatus for the treatment of air; ] ovens for waste treatment; [ apparatus for the treatment of waste water, namely, waste water purification units and waste water treatment tanks; ] heating apparatus for waste treatment, namely, waste disposal furnaces; [ water softening apparatus and installations; hot air apparatus, namely, hot air blowers, and hot air space heating apparatus; air conditioning apparatus; heat accumulators; steam accumulators; ] disinfectant apparatus, namely, disinfectant apparatus for medical purposes; [ apparatus for disinfecting water, and dish disinfectant apparatus for industrial purposes; steam boilers, other than parts of machines, namely, steam furnace boilers and steam heating boilers; incinerators; heat pumps; steam generating installations; water purification installations; water purifying apparatus and machines; air-purifying apparatus and machines; ] sterilizers [ ; water sterilizers; air sterilizers; thermostatic valves as parts of heating installations ]