MTL vs RDL vs DTL Vaping: What's the Difference?

If you've spent any time looking at vape kits, you've probably come across abbreviations such as MTL, RDL and DTL.

But what do they actually mean?

These terms describe different ways of inhaling vapour, and the difference can have a surprisingly big effect on the type of vape kit, coil and e-liquid that suits you.

For someone new to vaping, the terminology can be confusing. A device might be described as an MTL pod, an RDL kit or a DTL tank, without explaining what any of those terms actually mean.

So, in this guide, we're breaking it all down.

We'll explain the difference between Mouth-to-Lung (MTL), Restricted Direct-to-Lung (RDL) and Direct-to-Lung (DTL) vaping, how each style works, what type of equipment is typically associated with each one, and how to work out which style might suit your preferences.

Please note: Vaping products are intended for adult smokers and existing nicotine users. Nicotine is addictive. This guide is for general product information and does not encourage non-smokers to start vaping.

What Do MTL, RDL and DTL Mean?

The easiest way to understand the three styles is to think about where the vapour goes when you inhale.

MTL – Mouth-to-Lung

MTL stands for Mouth-to-Lung.

With this style, you first draw vapour into your mouth and then inhale it into your lungs.

It's similar to the way many people naturally inhale when smoking a cigarette.

MTL vaping is commonly associated with:

• Smaller pod systems
• Lower-powered devices
• Tighter airflow
• Higher-resistance coils
• 50/50 e-liquids
• Nicotine salts and lower-volume vapour

The draw tends to feel tighter and more controlled, rather than producing a large amount of vapour.

For many people moving away from smoking, an MTL-style device can feel relatively familiar.

RDL – Restricted Direct-to-Lung

RDL stands for Restricted Direct-to-Lung.

As the name suggests, it sits somewhere between MTL and DTL.

Instead of drawing vapour into your mouth first, you inhale it more directly into your lungs, but the airflow is still restricted compared with a full DTL setup.

RDL vaping can provide a compromise between the tighter draw of MTL and the more open airflow of DTL.

Typical RDL characteristics include:

• Moderate airflow
• Medium-powered devices
• Moderate vapour production
• A more open inhale than MTL
• Coils with lower resistance than traditional MTL coils
• A balance between flavour and vapour production

RDL is increasingly popular with vapers who want a little more vapour and airflow without going all the way to a large, airy DTL setup.

DTL – Direct-to-Lung

DTL stands for Direct-to-Lung.

Instead of drawing vapour into your mouth first, you inhale it directly into your lungs.

This generally produces a much more open draw and a larger volume of vapour.

DTL setups are commonly associated with:

• Higher-powered vape devices
• Lower-resistance coils
• Larger tanks
• More open airflow
• Higher-VG e-liquids
• Larger vapour production

DTL vaping is often more popular with experienced vapers who prefer an open inhale and larger vapour production.

MTL vs RDL vs DTL at a Glance

These are general characteristics rather than absolute rules.

Modern vape devices can be extremely flexible, and some kits can accommodate more than one vaping style by changing the coil, airflow or power settings.

Which Vaping Style Is Most Like Smoking?

For adults who already smoke cigarettes and are exploring vaping as an alternative, MTL is generally the style that most closely resembles the mechanics of taking a cigarette puff.

You draw into your mouth first and then inhale.

The tighter airflow can also feel more familiar than the open draw associated with DTL vaping.

That doesn't mean every smoker will automatically prefer MTL, though.

Everyone has different preferences, and some people quickly find that they prefer a more open RDL style.

What Is the Difference Between MTL and RDL?

MTL and RDL are probably two of the most useful styles to understand if you're using a modern pod kit.

The main difference is the airflow and inhalation method.

With MTL, you take a relatively tight draw and inhale the vapour from your mouth into your lungs.

With RDL, the airflow is more open and the vapour is inhaled directly into the lungs.

As a result, RDL generally produces more vapour and gives a less restricted inhale.

Think of it like this:

MTL = tighter and more controlled

RDL = more open and more airy

If MTL feels too restrictive but DTL seems like too much airflow and vapour, RDL can sit comfortably between the two.

What Is the Difference Between RDL and DTL?

RDL and DTL are both direct-to-lung styles, so the difference mainly comes down to how open the airflow is.

RDL provides some restriction.

DTL is much more open.

A DTL setup may allow considerably more airflow through the device, resulting in a larger vapour production and a more airy inhale.

RDL gives you some of those characteristics while retaining more resistance in the draw.

This is particularly useful for people who like direct-lung vaping but don't want an extremely airy inhale.

Does MTL Produce Less Vapour?

Generally, yes.

MTL devices and coils are usually designed for lower vapour production than DTL setups.

That's one reason compact pod systems are so popular for MTL vaping. They can be smaller, simpler and less demanding than larger high-powered devices.

However, vapour production depends on several factors, including:

• Coil resistance
• Power output
• Airflow
• E-liquid composition
• Coil design
• Device design
• How you inhale

So it's impossible to judge vapour production from coil resistance alone.

Does DTL Use More E-Liquid?

It often can.

Because DTL vaping generally involves higher power and produces more vapour, it can consume more e-liquid than a typical MTL setup.

That's not necessarily a problem, it simply means the ongoing cost and e-liquid usage can be different.

If you're moving from a small pod device to a larger DTL setup, don't be surprised if your e-liquid bottle doesn't last as long.

What E-Liquid Is Best for MTL?

There isn't one e-liquid that is universally "best", but MTL devices commonly pair well with 50/50 VG/PG e-liquids.

These liquids are relatively balanced and are commonly used in pod systems and other lower-powered devices.

Nicotine salts are also commonly associated with MTL vaping because they can provide nicotine in a smooth format.

The most important thing is to make sure the e-liquid you're using is suitable for your particular coil and device.

Always check the manufacturer's recommendations.

What E-Liquid Is Best for DTL?

DTL devices commonly use e-liquids with a higher VG proportion.

VG, or vegetable glycerine, is a thicker component of e-liquid that contributes to vapour production.

Higher-VG liquids are generally more suited to devices and coils designed to handle thicker e-liquid.

The important part is matching the e-liquid to the equipment.

Using a thick e-liquid in a small pod designed for thinner liquid can result in poor wicking or performance.

Likewise, using an unsuitable e-liquid can contribute to leaking or coil problems.

Always check what your coil and device manufacturer recommends.

What About RDL E-Liquid?

RDL sits in the middle, so the ideal e-liquid depends heavily on the particular coil and device.

Some RDL setups are perfectly suited to 50/50 or balanced liquids, while others are designed for higher-VG blends.

This is why looking at the recommended e-liquid type for the specific coil is more useful than choosing an e-liquid based purely on whether you're calling your vaping style "RDL".

Which Coil Should You Use for MTL?

MTL coils are generally higher resistance and designed to operate at relatively low power.

For example, you may see coils around or above 1.0Ω used in MTL-focused devices, although lower-resistance coils can also be used depending on the design.

The exact resistance isn't the only factor.

Coil construction, airflow, recommended wattage and the device itself all matter.

The safest option is always to use a compatible coil recommended for your specific vape.

Which Coil Should You Use for DTL?

DTL setups commonly use lower-resistance coils.

Sub-ohm coils coils with a resistance below 1.0Ω are particularly common in DTL vaping.

They're generally designed to operate at higher power and produce significantly more vapour.

Again, lower resistance does not automatically mean "better".

The right coil is the one designed for your particular tank or pod system and your preferred way of vaping.

Can One Vape Kit Do MTL, RDL and DTL?

Some devices can accommodate more than one style.

A device with adjustable airflow and multiple compatible coils may allow you to move from a relatively tight draw towards a more open one.

For example, you could potentially use one coil configuration for a tighter MTL-style draw and another for a more open RDL experience.

However, not every device is designed to do this.

A small MTL pod isn't necessarily going to become a true DTL device simply because you open the airflow.

The coil, power output and overall design all matter.

How Does Airflow Affect Your Vape?

Airflow is one of the easiest ways to change how a vape feels.

Closing the airflow generally makes the draw tighter.

Opening it generally makes the draw more airy.

A tighter airflow can create an experience that feels more concentrated and controlled.

A more open airflow can make the inhale feel smoother and less restricted while increasing vapour production.

This is why adjustable airflow is such a useful feature.

Small changes can make a noticeable difference.

Why Does My Vape Feel Too Tight?

If you're struggling to inhale through your vape, several things could be causing it.

Your airflow may simply be too restricted.

Your coil may also be designed for a tighter MTL experience.

A blocked airflow path, condensation or a damaged pod can also affect the draw.

Start by checking your airflow setting and making sure the device and pod are clean and correctly assembled.

If the problem continues, check whether the coil or pod needs replacing.

Why Does My Vape Feel Too Airy?

The opposite problem can happen too.

If your vape feels like you're drawing almost nothing but air, your airflow may be too open for your preference.

Try reducing the airflow gradually.

If you're using an adjustable device, small changes are often all that's needed.

The coil you're using can also affect the amount of airflow and vapour you experience.

Can MTL, RDL and DTL Change the Flavour?

They can.

The way a device operates can affect how an e-liquid tastes and feels.

Different coils, power levels and airflow settings can all alter flavour delivery.

A tighter MTL setup may produce a more concentrated-feeling draw.

A higher-powered DTL setup can produce much larger volumes of vapour and may present flavours differently.

This is one reason two people can use the same e-liquid and have noticeably different experiences.

Their devices, coils and settings may be completely different.

Which Vaping Style Should You Choose?

There isn't one style that is right for everybody.

Instead, think about what you actually want from your device.

Choose an MTL-style setup if you prefer:

A tighter inhale, smaller devices, lower vapour production and a draw that feels closer to taking a cigarette puff.

Consider RDL if you prefer:

A little more airflow and vapour than MTL without the very open draw of a typical DTL setup.

Consider DTL if you prefer:

A very open inhale, larger vapour production and a higher-powered device with more control over airflow and performance.

What If You're Not Sure?

That's completely normal.

The terminology can sound much more complicated than it really is.

A useful way of thinking about it is:

MTL = tight

RDL = restricted direct lung

DTL = open

Once you've understood that basic difference, choosing between different devices and coils becomes much easier.

MTL, RDL and DTL: The Bottom Line

MTL, RDL and DTL aren't different types of vape products they're different styles of using a vape.

MTL means Mouth-to-Lung and generally gives you a tighter, more cigarette-like draw.

RDL means Restricted Direct-to-Lung and sits between MTL and DTL.

DTL means Direct-to-Lung and generally provides a much more open inhale and greater vapour production.

The important thing isn't finding the "best" style.

It's finding the style that works with your device, your e-liquid and your personal preference.

At LJVapes, you'll find a wide selection of pod kits, vape kits, e-liquids, coils and pods, making it easier to build a setup around the way you prefer to vape.

Whether you prefer a tight MTL draw, a more relaxed RDL inhale or the open airflow of DTL, always check the manufacturer's recommended coil, wattage and e-liquid compatibility before using a new setup.

And remember: vaping products are intended for adults and existing nicotine users. Nicotine is addictive, so use nicotine products responsibly and according to the manufacturer's instructions.