The EFG swimming pool dehumidification air handling units for dehumidification and ventilation in public indoor swimming pools, private indoor swimming pools and wellness centers. The EFG 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 units can be operated very energy efficient. The EFG units are available in 7 sizes between 15 to 99 kg/h dehumidification capacity. EFG units with 2-step heat recovery, 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.