Printing system

A printing system for performing printing on a print medium, comprising:

• a printing unit configured to perform the printing on the print medium;
• a drying unit configured to dry the print medium on which the printing is performed by the printing unit, the drying unit provided with an air intake port for taking air, and a supply port for performing cooling with air taken from the air intake port and heating the air, taken from the air intake port, to supply the air as warm air to the print medium;
• a casing including therein the printing unit and the drying unit;
• a heat exchanger provided with an outside air inlet through which outdoor air enters, an outside air outlet through which air from the outside air inlet is ejected outdoors, an exhaust gas inlet through which part of the warm air from the supply port is taken as exhaust gas, and an exhaust gas outlet through which air is exhausted whose heat is exchanged between the exhaust gas taken from the exhaust gas inlet and the outside air taken from the outside air inlet;
• a first exhaust duct through which part of the warm air supplied from the supply port is supplied to the exhaust gas inlet;
• a second exhaust duct via which the exhaust gas outlet is in fluid communication with the air intake port;
• a first outside air duct via which the outside air inlet is in fluid communication with the outdoors;
• a second outside air duct via which the outside air outlet is in communication with the outdoors;
• and
• an exhaust pipe through which part of the warm air supplied from the supply port is ejected to an exterior of the casing.