Air conditioning system

An air conditioning system comprising:

• an air passage having a first passage and a second passage, wherein outdoor air flows to an inside of a room in the first passage and room air flows to an outside of the room in the second passage;
• a heater that is disposed in the air passage and heats air;
• a cooler that is disposed in the air passage and cools air;
• and
• a first adsorbent member and a second adsorbent member that are disposed in the air passage and can adsorb moisture in air and release moisture into the air,
• wherein:
• the air passage is constructed so as to be able to switch between a first operating state and a second operating state, wherein air flowing from the outside of the room to the inside of the room passes through the cooler and the first adsorbent member or the second adsorbent member and air flowing from the inside of the room to the outside of the room passes through the heater and the second adsorbent member or the first adsorbent member in the first operating state, and the air flowing from the outside of the room to the inside of the room passes through the heater and the first adsorbent member or the second adsorbent member and the air flowing from the inside of the room to the outside of the room passes through the cooler and the second adsorbent member or the first adsorbent member in the second operating state, and
• wherein:
• a dehumidifying operation mode and a humidifying operation mode performed by switching a flow of air at specified intervals in each operating state;
• a cooling operation mode and a heating operation mode performed not by switching but by fixing the flow of air in each operating state;
• and a ventilating operation mode performed by flowing air through the air passage in a state where the heater and the cooler are stopped can be performed.