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...