Yes it is an airy draw, and designed to be so for 1) keep things cool, 2) for the fact the wicks are constantly in contact with your liquid, not requiring tilting up and such to get them wet. I do notice with mine, when chain
vaping, once the glass starts getting warm, vapor taste does increase on sweeter liquids. However, the EVOD heads can be used with the protank which tightens up the draw, there is also an airflow regulator offered that does so as well, and other end-user tricks to plug 1 or 2 of the air holes to tighten the draw up on it. The biggest advantages of the protank is it is pyrex/stainless so all tank cracking/melting liquids won't affect it. Easy to clean, sturdy as heck, and can handle getting warm via chain
vaping or cranking up the Volts/Watts without batting an eye, though with thicker liquids at 50PG/50VG to 0PG/100VG you have to disassemble the heads to remove flavor wicks to allow it to wick good enough. Another strength is the heads can be rebuilt/rewicked/recoiled if you have the know-how.