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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 moderate, 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 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)
General Information about Puffing Techniques while Vaping
