Innokin PRISM T18 CLEAROMIZER User Manual page 43

NOTES & PRECAUTIONS
Sub-Ohm Vaping (Direct Lung Inhalation)
While puffing, the vapor of an e-cigarette is directly inhaled into the lungs.
This puffing technique is referred to as sub-ohm vaping with direct lung in-
halation. To achieve this, there must be low puffing resistance and a strong
air supply to the atomizer head. Both have a positive effect on producing
large quantities of vapor. Atomizer heads that support this puffing technique
in the sub-ohm range (resistance usually < 1 ohm) are often referred to as
DL (direct lung) heads. (other abbreviations include DTL and D2L)
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