Yes! Since a table fan draws in air from one side and removes cool air from the other side, a table fan can be used as an exhaust fan. It can suck in the odour from your kitchen or washroom and can be vented out into the open air. The condition that needs to be followed is that the fan needs to be very robust and strong in nature, else it will not be able to function as an exhaust fan. Thus, proper care must be taken before using it as an exhaust fan, else things might not work as expected.