A ventless dryer is a type of clothes dryer that does not require an external vent to expel hot air. Instead, it uses a closed-loop system to dry clothes by recycling air within the machine. This makes it ideal for small spaces or apartments where venting is not possible. These dryers typically use either a heat exchanger or a condensation process to remove moisture from clothes. As the dryer operates, it collects water from the damp air and drains it away, allowing for efficient drying without the need for ductwork.