When you are shopping for vapes, you are going to come across mouth-to-lung and direct-to-lung, not to mention sub-ohm. But what do they mean? 


What is Mouth-to-Lung inhaling?

When you take a draw on your vape, you will experience one of two things. A vapour that you hold in your mouth before transferring to your lungs. Or one that heads straight down to your lungs. 

The mouth-to-lung inhale is closer to a cigarette. With this type of in method, you are likely to get a much bigger throat hit, which many people prefer. 

For mouth-to-lung vaping you take a smooth, steady drag, then hold the vapour in your mouth before inhaling into your lungs. For mouth-to-lung vaping it is better to use a high PG ratio, as this gives a nice throat hit. Anything with a 50:50 ration will be fine. 


What is Direct-to-Lung inhaling?

Unlike mouth-to-lung inhaling, you take this type directly to your lungs. It is closer to taking a deep breath than smoking a cigarette. 

Direct-to-lung vaping needs a more significant airflow to cool the vapour down quicker, so direct-to-lung devices are designed to pull air over the coil quickly. 

Direct-to-lung can be referred to a direct-lung, and straight-to-lung inhaling. 

In order to direct-to-lung vape, you twist the airflow wide open. And take a deep pull similar to taking a deep breath. This allows the vapour to hit the lungs straight away. For direct-to-lung you should be looking for a higher VG ratio. So 80:20 VG/PG.


Is Both Possible?

There is a crossover point between mouth-to-lung and direct-to-lung vaping techniques. Suppose you consider that all vapour needs to pass through your mouth first on the way to the lungs, so technically it is possible. The terms are both widely used to distinguish different kinds of vaporisers, so you should know what they mean for your vaping experience before you buy anything. 

What is Restricted Direct-Lung Vaping?

This relatively new term, which can be abbreviated to RDL, is a firm nod to that crossover just mentioned. It refers to a vape which is airier than a typical mouth-to-lung vape but not as airy as a direct-to-lung vaporise is. 

With this you don’t get the big throat hit of mouth-to-lung, you get a much lighter one, but it is still there, and you inhale the same way as with a direct-to-lung vaporiser. 


Mouth-to-Lung vs Direct-to-Lung

Many people are most comfortable with mouth-to-lung when they first start vaping, as generally, they are most used to this mechanism. This style is perfect for a higher nicotine level, tighter draw and a throat hit. 

Many people feel this is the closest style to smoking cigarettes. Direct-to-lung can be more intense, and if you are new to vaping, it can make you cough a little. 



One of the great things about vaping is the sheer amount of flavours that you have to choose from. Many vapers believe that they get the most flavour from a mouth-to-lung technique than from a direct-to-lung method. This is likely due to the extra air that you inhale with the direct-to-lung technique. So while you get more initial flavour with a mouth-to-lung vape, with direct-to-lung, the vapour is designed to be milky and intense in terms of flavours. 

In general when it comes down to it, mouth-to-lung or direct-to-lung depends on how you smoke, and the flavour you want from your clouds.