1 control cabinet with controller,  2 air inlet with filter,  3 condenser,  4 blower,  5 flow distributor,  6 heater,  7 vapor humidifier,  8 humidification section,  9 standard connection spigot for external ventilation system,  10 inspection flap,  11 inclined tube manometer,  12 ventilation grille with volume adjustment,  13 fire damper,  14 cooling section (direct evaporator)