Single machine achieves three core functions: air dehumidification, pool water heating, and indoor space heating. Replace independent dehumidifiers, pool heaters, and air heating equipment, saving equipment investment and machine room space. The dehumidification process recovers latent heat from humid and hot air, and the recovered heat is used to heat pool water and indoor air. Compared to split type heating and dehumidification equipment, it significantly reduces energy consumption and long-term operating electricity costs. Continuously and stably control indoor air humidity to avoid condensation on glass windows, walls, ceilings, and metal components; Inhibit mold growth, metal corrosion, wall paint peeling, and protect buildings and interiors. Balance and control indoor temperature and humidity, reduce pool water evaporation, decrease the spread of chlorine odor, improve indoor air quality, and provide a comfortable experience for swimmers. Equipped with a complete set of protection mechanisms such as high and low pressure, overheating, water flow monitoring, anti freezing, and fault self checking, timely alarm for abnormal working conditions, ensuring long-term stable and safe operation of the unit.