Air heaters; Air cooling apparatus; Water purification and filtration apparatus; Filtering units for Water purification and filtration apparatus. The water treatment apparatus uses electrolysis to remove ozone and chlorine from water while enriching it with hydrogen, thereby improving its quality and purity. Because The hydrogen generation process does involve filtration and purification effects: O₃ (Ozone) removal – Electrolysis helps break down ozone. Chlorine reduction – Some dissolved chlorine may be eliminated when hydrogen gas is generated and water is exposed to air. Filtration components - Hydrogen water bottles include basic filtration layers to improve water quality before electrolysis.