What are the different functions of a condensing tumble dryer?

One function of a condensing tumble dryer is that dry air is heated within it to dry the clothes inside. Instead of passing through a vent after that, the air is recycled back into the drying unit after the water has been removed. A secondary function of this type of dryer is that the hot air from the dryer will heat up the space around it while the dryer completes its cycle.