Bath tubs; spas in the nature of heated pools; electrical boilers; furnace boilers; coils in the nature of evaporators for use in air heating and cooling units and in water distilling units; air conditioners; water coolers; walk-in coolers for tobacco; dish disinfectant apparatus for industrial purposes; disinfectant dispensers for toilets; distilling units; drinking water filters; cooling evaporators; furnaces; heat exchangers not being parts of machines; heat pumps; electric heaters for baby bottles; electric space heaters; hot water heaters; electric heaters for commercial use; industrial boilers; humidifiers for central heating installations; laundry room boilers; refrigerating machines; water filtering devices, namely, water purification installations for waste water and sewage consisting of curtains and textile fabrics; showers; steam radiators for heating buildings; swimming pool chlorinating units; refrigerated dispensing units for drink water; electric bath-water purifying apparatus for household purposes; filtering units for water filtering; gas water heaters; hot water tanks; water filters; water heaters for domestic, commercial and industrial use; water purifying apparatus; water softening units; water sterilizers not for medical purposes; whirlpools; whirlpool jets | Treatment of waste water; water treatment; oil refining; fuel refining
