Ventilation apparatus

A ventilation apparatus comprising:

• a housing having an inner space, the housing including:
• a front cover, the front cover having an indoor air inlet and an air discharge opening;
• a rear cover, the rear cover having an outdoor air inlet and an indoor air outlet;
• and
• a side cover configured to connect edges of the front cover and the rear cover to define the inner space;
• a separation wall configured to divide the inner space of the housing into a ventilation portion and an air conditioning portion;
• a total heat exchanger located in the ventilation portion;
• a supply-side mullion located in the air conditioning portion and adjacent to a first inner side of the side cover to define an outdoor air supply passage between the supply-side mullion and the first inner side of the side cover;
• a discharge-side mullion located in the air conditioning portion and adjacent to a second inner side of the side cover to define an indoor air discharge passage between the discharge-side mullion and the second inner side of the side cover;
• and
• an evaporator located in the air conditioning portion and between the supply-side mullion and the discharge-side mullion.