The EFG-U swimming pool dehumidifycation air handling units for dehumidification and ventilation of smaller private indoor swimming pools and wellness centers. The EFG-U units reduce the humidity inside the swimming pool area by dehumidification of the air and therefore reduce the chance of structural damages due to humidity and condensation and provide a comfortable air climate. Due to an intelligent control system and a heat pump the EFG-U units can be operated very energy efficient. The EFG-U units are available in 4 sizes between 5 to 16 kg/h dehumidification capacity. EFG-U units with air-recirculation system, an integrated control system, wired ready to connect, including electronic humidity and temperature control as well as heat pump system and swimming pool water heater.