When using lower airflow, you’ll gain more flavor from your vape. When less air encounters the coils, it forces the vapor out quicker as well as becomes warmer. When it’s forced out quicker, the flavor comes out fuller and thicker than when using a larger airflow. This is due to the “Joule-Thomson effect”. The Joule-Thomson effect explains that when air passes through a reduced orifice size, it causes a drop in the temperature. The speed of air flow affects the cooling efficiency, which also affects the overall flavor of the vapor. With an increased airflow, you will experience less flavor, less of a harsh throat hit and more vapor (with a cooler and looser draw). With a decreased airflow, you will experience more flavor, more of a harsh throat hit, and less vapor (with a hotter and tighter draw).