Cool mist humidifiers effectively moisturize a room, while an air conditioner is designed to keep a room or home cool, temperature-wise. The two appliances can, however, be used simultaneously to achieve an optimal, climate-controlled effect. Consider that:
Air conditioners dry out the air in a room, but when used with a cool mist humidifier, the humidity returns to a comfortable level without affecting the temperature.
Both cool mist humidifiers and air conditioners are used with the windows closed, working in harmony to cool and re-moisturize a space.
The air conditioner fan or vent will work to spread the cool mist around a room if the humidifier is positioned accordingly.
Some newer air conditioners include a humidifier setting.