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What is the difference between vaping Mouth-to-Lung (MTL) and Direct-Lung (DL) inhalation and which is suitable for you

by Martin Smith

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Starters often don’t understand what vaping Mouth-to-Lung (MTL) and Direct-Lung (DL) are, what is the difference between them? In fact, these are the two most common inhalation methods for vaping, and different inhalation methods will bring vapers a different experience. The Direct-Lung (DL) is very similar to our daily smoking techniques when using traditional cigarettes, while Mouth-to-Lung (MTL) is closer to the way of inhaling when using hooka shisha. For more detailed distinctions and details, here we go.

Direct-Lung (DL)

The DL inhalation is the same as our daily smoking method. The user first inhales smoke from the atomizer and then inhales additional air to bring the smoke into the lungs. Compared with the MTL inhalation, the smoke will be in the user’s mouth for a long time, so those accustomed to MTL tend to enjoy the more detailed and subtle flavor of the vape juice.

Those MTL vapers would switch to vaporizers with high coils resistance whose output power is generally controlled below 15W. In order to match these devices, vapers are accustomed to choosing from PG, E-liquid with higher nicotine content to enjoy an inhalation experience similar to the throat hit of cigarettes.

1. Advantages of Direct-Lung

Due to the slow inhalation and the relatively slow evaporation rate of the e-liquid, the same amount of e-liquid can be used for a longer time.

The device does not need excessive output power during direct-lung vaping, which prevents the device from overheating during use.

Because it is used in the same way as cigarettes, the way of inhalation is more popular among those substitute cigarettes.

Direct-Lung is conductive to the smoke staying in the vaper's mouth for a longer period of time, which helps the vaper to obtain a more delicate taste experience of the e-liquid.

Second, the disadvantages of DL

Due to the low output power of the device during oral inhalation and the smaller amount of smoke, the throat hit produced by the smoke on the user is also weaker than that of MTL.

At present, dripping atomizers and high-power atomizers have gradually occupied the mainstream of the market, and DL is outdated.


As the name suggests, the Mouth-to-Lung is that the vaper inhales smoke directly from the atomizer into the lungs, just like daily deep breathing. The dense smoke fills the lungs instantly, similar to the experience of using hookah shisha.

MTL gives vapers a stronger impact experience since big smoke contributes to a richer and fuller taste experience. At the same time, due to the instantaneous evaporation of a large amount of e-liquid, the cooling design of the atomizer has also become very important. Because of the big cloud, the throat hit will be more obvious when inhaling the lungs. Those accustomed to Direct-Lung tend to choose from e-liquid with lower nicotine content.

As mentioned above, most MTL vapers choose from dripping atomizers or Sub-ohm atomizers. At the same time, when it comes to the choice of e-liquid, they are more inclined to choose VG E-liquid with higher content and lower nicotine content to reduce the impact of the throat hit.

1. Advantages of Mouth-to-Lung
Smoke is directly inhaled into the lungs, which contributes to a stronger throat hit while getting a fuller and richer vaping experience. Direct-Lung is the best way for those enjoying big smoke.

Second, the disadvantages of Mouth-to-Lung
Pay more attention when choosing e-liquid. Excessive PG and nicotine content would give you an unbearable throat hit. At the same time, dry cotton burning caused by poor oil conduction will make things worse.

All in all, how long you vape, what devices, atomizers, and output power you use determine whether Mouth-to-Lung (MTL) or Direct-Lung (DL) inhalation is your choice; generally speaking, those beginners are inclined to choose from DL, and most the heavy vapers prefer MTL


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