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NOTES & PRECAUTIONS
When vaping, a distinction is made between two puffing techniques:
Moderate Vaping (Mouth-to-Lung)
The vapor from an e-cigarette is first collected in the oral cavity for the entire duration
of the puff and then inhaled into the lungs. This puffing technique is referred to as mo
-
derate, mouth-to-lung vaping and is similar to smoking. To achieve this, there must be
a noticeable resistance when puffing on the e-cigarette. Evaporator heads that support
this puffing technique in the moderate range (resistance usually > 1 ohm) are often
referred to as MTL (mouth to lung) heads. (Other abbreviations include ML and M2L)
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 inhalation. To achieve this,
there must be low puffing resistance and a strong air supply to the evaporator head. Both
have a positive effect on producing large quantities of vapor. Evaporator heads that sup-
port 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)
General Information about Puffing Techniques while Vaping
