Germicidal lamps for purifying air; Cooling installations for water; Air deodorising apparatus; Ionization apparatus for the treatment of air or water; Air purifying apparatus and machines; Germicidal burners; Coils (parts of distilling, heating or cooling installations); Distillation apparatus; Water conduits installations; Sanitary apparatus and installations; Purification installations for sewage; Water purifying apparatus and machines; Pasteurisers; Disinfectant apparatus; Gas scrubbing apparatus