Water heaters; solar collectors (heating); solar collectors (lighting); solar lamps; solar panels for use in heating; apparatus for heating; appliances for heating; installations for heating; water heating installations; installations for lighting; lighting apparatus and installations; apparatus for water supply; hot water supply heaters; installations for water supply; water purification filters; water treatment filters; air cooling apparatus; cooling apparatus; cooling appliances and installations; none of the aforementioned being specifically designed for use with, or being part of, bath and hydrotherapy apparatus, spa baths, spa pools, swimming pools, or swimming spas