Apparatus for heating, steam generating, cooking, refrigerating, drying, ventilating and water distribution, as well as sanitary installations, namely, steam rooms, steam generators, water heaters, steam tables for food serving and keeping; laundry dryers; steam booths in the nature of steam generating installations for drying clothing; refrigerators and freezers; chest freezers; ice making machines; refrigerated counters, display units in the nature of merchandise cabinets and display cases;...