MTL or DL ?
How do vaper's take in the
when using a PV ?
There are two distinct styles.
MTL = Mouth To lung
DL = Direct to Lung
What's the difference ?
ALL real tobacco smokers start out as Mouth To Lung.
It is very rare that real cigarette smokers migrate to DL.
Therefore these smokers would have never experienced DL
except for those who have tried other devices such as a
1. In MTL, the vapour is first sucked using the
2a. The vapour can either be exhaled immediately (from
the mouth or through the nose)
2b. The vapour can be sucked again into the lungs (from the
mouth) and exhaled after.
Direct To Lung is used for devices which require a greater
rate of air-intake.
1. In DL, the vapour is sucked directly into the lungs from
the beginning of the puff.
2. The vapour is exhaled (either via the mouth or nose).
The reason why real cigarette smokers don't DL is because of
the overwhelming intensity of the smoke and because the filter
on the cigarette doesn't allow for a great amount of
The first time a vapor user uses DL, he is likely to feel
sick. This is due to the user not being used to the intensity
of the vapour. It is not recommended for a first-time DL user
to use a strong e-liquid, i.e one with concentrated flavour
and/or nicotine. The e-liquid should be diluted to weaken it's
The need for DL for the majority of moden PVs is mainly for
vapour production. The atomisers you find these days can only
produce sufficient vapour if the air-intake rate is high and
volume is large. This can only be achieved with DL (the lungs
hold more volume than the mouth). Using MTL on these atomisers
will result in very little vapour.
Having said that there are still atomisers and tank
combinations which are designed for MTL. Using DL on these
devices will not produce the desired affect because the
air-intake flow is restricted in the design.