Yes, Dynavaps have a carb. The carb is located on the side of the device, near the mouthpiece. Covering the carb with your finger while drawing on the mouthpiece restricts the air intake and helps build up vapor in the chamber. Releasing the carb by removing your finger from it allows air to flow freely through the device. It clears the chamber, allowing you to take a full vapor hit. The carb is a critical component of Dynavap's design, and it plays a crucial role in helping to regulate airflow and vapor production.