If you have a gas fireplace, you can adjust the airflow by using the damper. The damper is located at the top of the fireplace, and you can open or close it to adjust the airflow. If you want more airflow, you can open the damper slightly. If you want less airflow, you can close the damper. You can also adjust the airflow by using the vents on the side of the fireplace. The vents are located at the bottom of the fireplace, and you can open or close them to adjust the airflow. If you want more airflow, you can open the vents slightly. If you want less airflow, you can close the vents.