So how should solve this situation ?
One approach is to maintain negative pressure: Use an exhaust fan to continuously draw air from the closed doors and windows, creating an indoor air pressure lower than the outdoor pressure. The exhaust fan serves as the power source for negative pressure, not the purpose of ventilation. Airflow is the biggest source of temperature drop in swimming pools. The biggest difference between indoor negative pressure and ventilation lies in the number of exhaust fans and vents. More exhaust fans and fewer vents create negative pressure, while more vents and fewer fans result in ventilation. The benefit of indoor negative pressure is that it allows for air circulation and exchange, increasing oxygen levels and improving air quality. Negative pressure lowers the dew point of indoor air, preventing water vapor from condensing into dew. It also allows gaseous trichloramine to escape outdoors, reducing indoor chlorine odor.
(1). Dehumidification: Lower humidity reduces the specific heat of the air, making it easier for the body to dissipate heat, reducing sweating, and creating a more comfortable, less stuffy feeling. This is one of the main functions that has led to the recent surge in popularity of heat pumps in indoor swimming pools. Besides humidity control, heat pumps also efficiently recover heat from the corresponding enthalpy values of humidity, making it one of the most worthwhile methods to promote.
(3). Eliminating the Source of Chlorine Odor: Another major reason why the air in indoor swimming pools feels stuffy and polluted is due to bound residual chlorine, also known as chloramine. In this case, the stuffiness and pollutant smell originate from the pool water, and the pool water should be treated to improve it. Therefore, it is important to make good use of residual chlorine testing to confirm the content of bound residual chlorine in the pool water. Generally, 0.4 ppm is already enough to cause problems for swimmers. As a result, chlorine odor elimination agents such as ozone powder and superchlorinating agents are indispensable pool water agents for controlling air quality and play an important role in indoor swimming and leisure water use.