Ventilating apparatus, and method for controlling the ventilating apparatus

A ventilating apparatus comprising:

• a ventilating unit having a heat exchanger for making discharge air being discharged from a room to heat exchange with draw-in air being drawn-in from outdoors, an air draw-in fan, and an air discharge fan;
• a humidifying unit having a water supply tank for holding water, a humidifying member for absorbing water from the water supply tank for the draw-in air to pass therethrough for humidifying the same, and a drain pan for draining the water dropped from the humidifying member, wherein at least one of the water supply tank, the humidifying member, and the drain pan has an antibacterial coating applied thereto;
• and
• a submerged discharge sterilizing unit provided to the water supply tank to make selective submerged discharge in the water.